If your car is a 2018, it has the A8 and not the A10. The latest transmission fluid (Mobil 1 Synthetic LV ATF HP, part number 19417577, blue stripe on the bottle and not black) that actually fixes the problem came out in Jan 2019 as part of TSB 18-NA-355, so unless your A8 was flushed with this specific fluid, it can develop the shudder. Shudder TSB 18-NA-355 has been updated 7/19. I just caught wind of a very important update to the transmission shudder TSB. Apparently, as of July 9th, the TSB has been revised to no longer require diagnostic procedures. This is obviously big news for those of us who have had to jump through dealer hoops to get anything done.Page 2 March, 2019 Bulletin No.: 18-NA-355 Shudder Test Refer to the table below for conditions pertaining to specific applications. In each vehicle, constant throttle input on a smooth grade is desirable. PicoScope Measured Frequency is the approximate vibration frequency where TCC Shudder can be found, discussed in detail below. Page 2 March, 2019 Bulletin No.: 18-NA-355 Shudder Test Refer to the table below for conditions pertaining to specific applications. In each vehicle, constant throttle input on a smooth grade is desirable. PicoScope Measured Frequency is the approximate vibration frequency where TCC Shudder can be found, discussed in detail below. Jan 4, 2022 · They were not willing to admit that this is a widespread problem. I showed them the TSB 18-NA-355 that describes the problem. They said a new TSB was released in 2022, TSB 16-NA-361, where it states that this is normal operation and replacing any transmission components will not resolve the problem. Jul 29, 2019 · Shudder TSB 18-NA-355 has been updated 7/19. 96258 Views 354 Replies 83 Participants Last post by DieselDrax , Sep 26, 2022 Jump to Latest. B. BevyofChevys Discussion starter · Jul 29, 2019. I just caught wind of a very important update to the transmission shudder TSB. Apparently, as of July 9th, the TSB has been revised to no longer require ... Aug 30, 2019 · The latest revision of the shudder TSB (July 8 2019 : 18-NA-355 TSB) now states to go ahead and just do the flush if it has not yet been performed. This is good news, and what GM should have done from the beginning with this latest fluid if they were so confident in it. BigTallVandy said: TSB's are simply guidance documents to assist service personnel in quickly diagnosing and repairing previously identified issues. They are not related to a vehicle's warranty. If a problem is addressed by a TSB and the vehicle is still under warranty, it is repaired free of charge to the owner.Dec 13, 2018 · Hi John. My local GM dealer recently (1/24/19) diagnosed my 2016 Camaro SS with the same code as your Corvette (18-NA-355). I google searched it and found your post. They flushed and changed my transmission oil (13K miles) and the shudder has greatly improved. However, I am noticing some new hesitations as the transmission shifts in lower gears. Sep 18, 2019 · C7 General Discussion - LATEST TSB 18-NA-355 for AUTO TRANS SHUDDER - I found and attached the latest TSB 18-NA-355 regarding automatic transmission shudder. It was on the NHTSA website. The latest update is July 29, 2019. I also found another bulletin that applies, see attached TSB 19-NA-142 Apr 13, 2020 · TSB 18-NA-355 was updated July 2019 negating the need for the picoscope diagnosis (see the bottom section in your link), and dealerships were directed to flush their existing stock. Both versions of 18-NA-355 used the same exact Mobil 1 fluid (or the TSB would have had a different number), which my dealership began using Jan 2019. June 27, 2022 Sponsored by Lubegard General Motors has published multiple technical service bulletins pertaining to torque converter clutch shudder issues in their 8-speed transmissions. This problem currently affects 11 different models across 3 different OEM brands for the model years between 2015 and 2019.For further information and the fluid exchange procedure, refer to GM corporate Technical Service Bulletin (TSB) 18-NA-355, available in Service Information. The Kit includes: • DT-52263-1 Block Assembly (with 10 foot long fluid drain hose and spring clamp)I've read 18-NA-177 and the older 16-NA-175 and now have found that an updated version of 16-NA-175 has this cryptic advice: Important: Do NOT replace the torque converter or transmission assembly for this condition. Engineer reviews have proven that replacing the torque converter does not provide a long-term solution to TCC shudder. As of August 7th, GM dealers should also be flushing all potentially affected new vehicles on the lot. According to TSB (Technical Service Bulletin) 18-NA-355, the latest update addresses “torque converter clutch (TCC) shudder conditions on 8L45 and 8L90” eight-speed automatic transmissions, RPO codes M5N, M5T, M5U, and M5X.If TCC shudder is present, a vibration peak will appear within +/- 2 Hz of the frequency listed in Bulletin #18-NA-355. Refer to the bulletin for additional information, including required shudder test conditions for each vehicle being diagnosed as well as the fluid exchange procedures. Fig. 11 Fluid ExchangeJul 29, 2019 · Shudder TSB 18-NA-355 has been updated 7/19. 96258 Views 354 Replies 83 Participants Last post by DieselDrax , Sep 26, 2022 Jump to Latest. B. BevyofChevys Discussion starter · Jul 29, 2019. I just caught wind of a very important update to the transmission shudder TSB. Apparently, as of July 9th, the TSB has been revised to no longer require ... TSB 18-NA-355. Note: Required tool kit DT-52263 is shipping from Bosch. All DT-52263 tool kits will ship from Bosch no later than February 14, 2019. If you encounter a vehicle with Torque Converter Clutch (TCC) Shudder prior to receiving tool kit DT-52263 please postpone the repair until you receive your tool kit. Performing repairs otherRudy's bundled a complete 8L90 Transmission service kit for your GM Truck and SUV. Keep your transmission operating at top notch with all the necessary filters and fluids! Service your transmission with the new updated transmission fluid per GM TSB 18-NA-355. All filters and gaskets are genuine ACDelco parts.Service Bulletin Bulletin No.: 18-NA-355 Date: May, 2019 TECHNICAL Subject: Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed Attention: This Bulletin only applies to vehicles sold in the U.S., Canada and Middle East Operations (MEO). Sep 1, 2020 · #18-NA-355 is the procedure that fixed my shudder issue. It took me three trips to the Dealership, and a test drive by the Service Manager for them to perform the TSB. 2017 Colorado Z71 V6 4WD Crew Cab -Leer bed cap. Shudder TSB 18-NA-355 has been updated 7/19. I just caught wind of a very important update to the transmission shudder TSB. Apparently, as of July 9th, the TSB has been revised to no longer require diagnostic procedures. This is obviously big news for those of us who have had to jump through dealer hoops to get anything done.The TSB 18-NA-355 states that General Motors knew about the Transmission Shudder as early as 2015, but only created the TSB in August 2019, "and this shows that General Motors suppressed information and decided to send vehicles to consumers anyway. According to the TSB Cadillac, Camaro, and GMCPI1178F warns Service Technicians about premature ...According to TSB (Technical Service Bulletin) 18-NA-355, the latest update addresses “torque converter clutch (TCC) shudder conditions on 8L45 and 8L90” eight-speed automatic transmissions, RPO codes M5N, M5T, M5U, and M5X. Affected vehicles include Chevrolet, GMC and Cadillac vehicles, as follows.Has the TSB 18-NA-355 Transmission Fluid Exchange fix your transmission shutter issues. We've linked to so many versions of TSBs it's easy to be looking at one when you think it's the other. I believe the one dated August 2019 is the most recent, with the last revisions in July, unless someone has found one that's even more recent.May 20, 2019 · Repeat steps 2 and 3, clean the transmission oil pan and magnet....." (3rd time the pan gets dropped) Version 1 dtd Jan 17, 2019: View attachment TSB # 18-NA-355 Part 1.pdf View attachment TSB # 18-NA-355 Part 2.pdf (this is the one with Corvette specific procedure, pg 25) TSB #18 NA 355 was I've read 18-NA-177 and the older 16-NA-175 and now have found that an updated version of 16-NA-175 has this cryptic advice: Important: Do NOT replace the torque converter or transmission assembly for this condition. Engineer reviews have proven that replacing the torque converter does not provide a long-term solution to TCC shudder. Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed. Attention: This Bulletin only applies to vehicles sold in the U.S., Canada and Middle East Operations (MEO). Mexico and Export Regions should follow Bulletin 19-NA-018.Join Date: Jun 2013. Location: Hackettstown, NJ. Posts: 209. After TSB 18-NA-355 Was Performed. 2018, 2SS Camaro with K&N cold air intake, flowmaster american thunderaxle back exhaust and AFM range finder. I just had the Transmission flush TSB 18-NA-355 performed today. I swear my engine and exhaust sound noticeably quieter after the flush.Jun 23, 2017 · Additionally, Hyundai increased the warranty for the engine “short block” (cylinder block, crankshaft, pistons, and connecting rods) to 10 years/120,000 miles for both original and subsequent owners of 2011 and 2012 Sonatas manufactured at Hyundai Service Bulletin Bulletin No.: 18-NA-355 Date: August, 2019 TECHNICAL Subject: Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed Attention: This Bulletin only applies to vehicles sold in the U.S., Canada and Middle East Operations (MEO).Chevrolet TSB 18-NA-355 Make: Chevrolet Number: 18-NA-355 Title: Shake And/Or Shudder During Light Throttle Acceleration Between 25 And 80 Mph (40 And 128 Km/H) At Steady Speed Date: 1/17/2019 Models: 2017-2019 Camaro LS; 2016-2019 Camaro LT; 2016-2019 Camaro SS; 2017-2019 Camaro ZL1; 2017-2019 Colorado; 2017-2019 Colorado LT; 2017-2019 ...The issue about the TCC shudder that many of us have experienced, and apparently carried over to a variety of GM models with the same trans assembly, seems to pretty accurately described in TSB #18-NA-355 (22 pages). I got the TSB number, because the dealer printed it in my service invoice (N/C, since I am under the powertrain warranty).The auto manufacturers had no legal obligation to repair the cars. Technical Service Bulletins are issued by manufacturers when there is a problem found in a number of cars which does not have an ...Shudder TSB 18-NA-355 has been updated 7/19. I just caught wind of a very important update to the transmission shudder TSB. Apparently, as of July 9th, the TSB has been revised to no longer require diagnostic procedures. This is obviously big news for those of us who have had to jump through dealer hoops to get anything done.My car was due for an oil change so I thought I would get the Thunk taken care of. I went in armed with the TSB #18-NA-355 dealing with the triple flush of fluids. However, the Corvette Tech specialist at the dealer said he would perform a complete diagnostic test before considering the TSB.Jul 29, 2019 · TSB-NA-355 was reference on the paperwork. All is good for now Bill 2023 GMC Canyon Denali | 1-20 - 1100 ordered | 2-24 - 3800 Built | 4-27 - 6000 Delivered 2023 Chevy Camaro 2SS 1LE 2018 GMC Canyon Denali Crew Cab 4WD V6 (sold) 2015 GMC Canyon SLT Crew Cab 4WD (sold) 2004 Chevy Colorado Z71 Crew Cab 4WD (sold) According to the Technical Service Bulletin (TSB 18-NA-355), flushing factory-used transmission fluid and swapping it for Mobil 1 Synthetic LV ATF HP fluid may improve the situation. If there is no noticeable improvement after transmission fluid flush, the torque converter could be glazed, especially if it was used with this issue for a long time.#18-NA-355 is the procedure that fixed my shudder issue. It took me three trips to the Dealership, and a test drive by the Service Manager for them to perform the TSB. 2017 Colorado Z71 V6 4WD Crew Cab -Leer bed cap.The GM 8L45 eight-speed automatic transmission. According to TSB (Technical Service Bulletin) 18-NA-355, the latest update addresses “torque converter clutch (TCC) shudder conditions on 8L45 and ...Service Procedure outlined in TSB 18-NA-355 for all models except the 2019 Chevrolet Silverado 1500 and GMC Sierra 1500 (New Body Style). For the 2019 Chevrolet Silverado 1500 and GMC Sierra 1500 (New Body Style), refer to bulletin 19-NA-121. Helpful websites. 18-NA-177 - RevBase - Chevrolet Bulletin RE: Procedure to confirm that shudder in Chevy Colorados and GMC Canyons is transmission related and if confirmed, directive to effect ...mitch22 Discussion starter · Sep 20, 2020. Cadillac Dealership here in AZ is wanting to do a full transmission service, flush, change the filter and reflush the trans on my 2016 escalade. He said it'd be about 20qts of the new Mobil 1 oil, pan gasket and filter.Apr 27, 2020 · Which revision of 18-NA-355 was followed and which fluid was used? It matters. Reply. steven says: May 5, 2020 at 6:42 am #16-NA-361 Document ID:4605342 The latest fluid was used. Reply. Jul 29, 2019 · TSB-NA-355 was reference on the paperwork. All is good for now Bill 2023 GMC Canyon Denali | 1-20 - 1100 ordered | 2-24 - 3800 Built | 4-27 - 6000 Delivered 2023 Chevy Camaro 2SS 1LE 2018 GMC Canyon Denali Crew Cab 4WD V6 (sold) 2015 GMC Canyon SLT Crew Cab 4WD (sold) 2004 Chevy Colorado Z71 Crew Cab 4WD (sold) Had New TSB #18-NA-355 (A8 Shudder) Done. FYI, if paying out of pocket for this it is 3 hours of labor versus the 1.6 in the bulletin. It took every bit of those 3 hours. I watched. GM evidently doesn’t reimburse dealers for full labor time on warranty work; hence the 1.6 hrs in the bulletin vs 3 if paying out of pocket.Apr 27, 2020 · Which revision of 18-NA-355 was followed and which fluid was used? It matters. Reply. steven says: May 5, 2020 at 6:42 am #16-NA-361 Document ID:4605342 The latest fluid was used. Reply. If TCC shudder is present, a vibration peak will appear within +/- 2 Hz of the frequency listed in Bulletin #18-NA-355. Refer to the bulletin for additional information, including required shudder test conditions for each vehicle being diagnosed as well as the fluid exchange procedures. Fig. 11 Fluid ExchangeService Bulletin Bulletin No.: 16-NA-175 Date: February, 2019 TECHNICAL Subject: Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at a Steady State Important: Follow the service procedures outlined in TSB 18-NA-355. Note: Required tool kit DT-52263 is shipping from Bosch.Shudder TSB 18-NA-355 has been updated 7/19. I just caught wind of a very important update to the transmission shudder TSB. Apparently, as of July 9th, the TSB has been revised to no longer require diagnostic procedures. This is obviously big news for those of us who have had to jump through dealer hoops to get anything done.Service Bulletin Bulletin No.: 18-NA-355 Date: August, 2019 TECHNICAL Subject: Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed Attention: This Bulletin only applies to vehicles sold in the U.S., Canada and Middle East Operations (MEO).Aug 18, 2020 · My 2015 is torn down as we speak for the torque converter flood back. There are two different TSB's here. The fluid flush to address the shudder is 18-NA-355. Mine is in for the delayed engagement issue where after sitting overnight, when going into drive there is a 3 second delay followed by a harsh "bang" as it engages. That tsb is 16-NA-014. The TSB 18-NA-355 states that General Motors knew about the Transmission Shudder as early as 2015, but only created the TSB in August 2019, "and this shows that General Motors suppressed information and decided to send vehicles to consumers anyway. According to the TSB Cadillac, Camaro, and GMCPI1178F warns Service Technicians about premature ...Technical Bulletin - #18-NA-355 - Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed - (Mar 30, 2020) - For 2017 Cadillac CT6. This bulletin is found in the CT6 Service Manual (Europe, Korea, N America, Other IO).The issue about the TCC shudder that many of us have experienced, and apparently carried over to a variety of GM models with the same trans assembly, seems to pretty accurately described in TSB #18-NA-355 (22 pages). I got the TSB number, because the dealer printed it in my service invoice (N/C, since I am under the powertrain warranty).It's also possible you will have some warranty left on the 2018. If it was a certified pre-owned, the powertrain warranty covers transmission/TC for 6 years 100k miles, otherwise I think the 2018 was 5 years 60k miles. I would personally get the '18 with zero hesitation. Just make sure you insist on them doing the flush per TSB 18-NA-355.This video is just a walk through of what you might be dealing with if you feel an unusual shudder.Subject: Shake and/or Shudder During Light Throttle Acce...I've read 18-NA-177 and the older 16-NA-175 and now have found that an updated version of 16-NA-175 has this cryptic advice: Important: Do NOT replace the torque converter or transmission assembly for this condition. Engineer reviews have proven that replacing the torque converter does not provide a long-term solution to TCC shudder.Apr 13, 2020 · Has the TSB 18-NA-355 Transmission Fluid Exchange fix your transmission shutter issues. We've linked to so many versions of TSBs it's easy to be looking at one when you think it's the other. I believe the one dated August 2019 is the most recent, with the last revisions in July, unless someone has found one that's even more recent. Jul 29, 2019 · TSB-NA-355 was reference on the paperwork. All is good for now Bill 2023 GMC Canyon Denali | 1-20 - 1100 ordered | 2-24 - 3800 Built | 4-27 - 6000 Delivered 2023 Chevy Camaro 2SS 1LE 2018 GMC Canyon Denali Crew Cab 4WD V6 (sold) 2015 GMC Canyon SLT Crew Cab 4WD (sold) 2004 Chevy Colorado Z71 Crew Cab 4WD (sold) 18-NA-355 18-NA-355 Shake And/Or Shudder During Light Throttle Acceleration Between 25 And 80 Mph (40 And 128 Km/H) At Steady Speed 1/17/2019 ATS Luxury ATS Premium Luxury ATS Premium Performance ATS-V CT6 Luxury CT6 Platinum CT6 Plug-In CT6 Premium Luxury CTS Luxury CTS Premium Luxury CTS Vsport CTS Vsport Premium CTS Vsport Premium Luxury CTS-VJan 17, 2023 · For example, the GM service bulletin 18-NA-355 for the 8-speed 8L90 transmission recommends flushing the transmission to fix 'Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH'. If you have the 6-speed transmission check if the TSB 21-NA-199 has been done to your truck, as it helps to keep the transmission cooler. TSB #18-039-20 Date Announced: APR 21, 2020 NHTSA ID: #10175733. Possible Driveability Issues due to the Winter-Blend Fuel into the Warmer Season Read More » TSB #18-089-19 Date Announced: NOV 01 ...Cost to replace the torque converter in a Camaro SS with the 8-speed automatic transmission. It was replaced due to the shudder as per TSB 18-NA-355💠My Inst...TSB-NA-355 was reference on the paperwork. All is good for now Bill 2023 GMC Canyon Denali | 1-20 - 1100 ordered | 2-24 - 3800 Built | 4-27 - 6000 Delivered 2023 Chevy Camaro 2SS 1LE 2018 GMC Canyon Denali Crew Cab 4WD V6 (sold) 2015 GMC Canyon SLT Crew Cab 4WD (sold) 2004 Chevy Colorado Z71 Crew Cab 4WD (sold)GM issued a Technical Service Bulletin TSB 18-NA-355, with updates that address the “torque converter clutch (TCC) shudder conditions.” The problem was identified by many customers who reported the transmission shuddering frequently and shifting harshly between first and second gear.TSB-NA-355 was reference on the paperwork. All is good for now Bill 2023 GMC Canyon Denali | 1-20 - 1100 ordered | 2-24 - 3800 Built | 4-27 - 6000 Delivered 2023 Chevy Camaro 2SS 1LE 2018 GMC Canyon Denali Crew Cab 4WD V6 (sold) 2015 GMC Canyon SLT Crew Cab 4WD (sold) 2004 Chevy Colorado Z71 Crew Cab 4WD (sold)I've read 18-NA-177 and the older 16-NA-175 and now have found that an updated version of 16-NA-175 has this cryptic advice: Important: Do NOT replace the torque converter or transmission assembly for this condition. Engineer reviews have proven that replacing the torque converter does not provide a long-term solution to TCC shudder.Sep 18, 2019 · C7 General Discussion - LATEST TSB 18-NA-355 for AUTO TRANS SHUDDER - I found and attached the latest TSB 18-NA-355 regarding automatic transmission shudder. It was on the NHTSA website. The latest update is July 29, 2019. I also found another bulletin that applies, see attached TSB 19-NA-142 Here is the tsb Bulletin #18-NA-355. Yes for both 8 speeds with shudder. The complains have declined much since this came out. There have been a few that it did not work for but they may have had ...Noticed the shudder at just under 1200 miles, Dec '18, purchased car new 2/18. Had oil change and 18-na-355 done 2/19 at about 1400 miles. 5575 miles now, still no shudder. Shifts perfectly, quick, crisp.In fact, 16-NA-175 refers readers to 18-NA-355 for service instructions. 18-NA-355 lists the PN for Mobil 1 Synthetic LV ATF HP as 19417577 for quart containers and 19417904 for 55-gal. drums but, as you stated above, both numbers are incorrect. The correct PN for the quart containers is 19353429.Helpful websites. 18-NA-177 - RevBase - Chevrolet Bulletin RE: Procedure to confirm that shudder in Chevy Colorados and GMC Canyons is transmission related and if confirmed, directive to effect ...This video is just a walk through of what you might be dealing with if you feel an unusual shudder.Subject: Shake and/or Shudder During Light Throttle Acce...Bulletin No.: 18-NA-355 April, 2020 Page 3 4733125 • DT-45096-31 TransFlow Adapter (one of two pieces from DT-45096-30) Service Procedure Initial TransFlow Flush Machine Setup Important: The prepping procedure only needs to be completed if the DT-45096 supply reservoir has DEXRON VI fluid in it and has not been converted to In January 2019, GM issued TSB 18-NA-355 entitled, “Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed.”Shudder TSB 18-NA-355 has been updated 7/19. I just caught wind of a very important update to the transmission shudder TSB. Apparently, as of July 9th, the TSB has been revised to no longer require diagnostic procedures. This is obviously big news for those of us who have had to jump through dealer hoops to get anything done.Mar 16, 2021 · Started experiencing the Transmission Shudder. GM refers to it as SERVICE BULLETIN 18-NA-355. Chevrolet Colorado 2017-2019. Condition: may be described as driving over low rumble strips or Highway with rough expansion joints. Cause: may be due to Torque Converter Clutch Shudder. Correction: Should have the appropriate fluid exchange procedure ... After implementing several fluid revisions, GM’s latest solution (TSB 18-NA-355) is lengthy, complicated and expensive. It requires 20 quarts/19 liters of costly ATF (the average retail, online price for this fluid is $18.10 per quart ) be flushed through the system to replace as much fluid as possible, yet, it still has not corrected the ...Apr 13, 2022 · Norcalace · #17 · May 6, 2022. MrYgrmstr said: My car is at the dealer for the next several days to fix the dreaded A8 shudder and a flaky infotainment screen. Man I hope it all gets resolved. As the title states, fingers crossed 🤞🏻. There is a Service Bulletin that covers your issue. It’s Bulletin # 18-NA-355. Aug 5, 2019 · Shudder TSB 18-NA-355 has been updated 7/19 I just caught wind of a very important update to the transmission shudder TSB. Apparently, as of July 9th, the TSB has been revised to no longer require diagnostic procedures. Jan 17, 2023 · For example, the GM service bulletin 18-NA-355 for the 8-speed 8L90 transmission recommends flushing the transmission to fix 'Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH'. If you have the 6-speed transmission check if the TSB 21-NA-199 has been done to your truck, as it helps to keep the transmission cooler. If your car is a 2018, it has the A8 and not the A10. The latest transmission fluid (Mobil 1 Synthetic LV ATF HP, part number 19417577, blue stripe on the bottle and not black) that actually fixes the problem came out in Jan 2019 as part of TSB 18-NA-355, so unless your A8 was flushed with this specific fluid, it can develop the shudder. Jan 17, 2019 · 18-NA-355 18-NA-355 Shake And/Or Shudder During Light Throttle Acceleration Between 25 And 80 Mph (40 And 128 Km/H) At Steady Speed 1/17/2019 ATS Luxury ATS Premium Luxury ATS Premium Performance ATS-V CT6 Luxury CT6 Platinum CT6 Plug-In CT6 Premium Luxury CTS Luxury CTS Premium Luxury CTS Vsport CTS Vsport Premium CTS Vsport Premium Luxury CTS-V TECHNICAL. Subject: Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed. Attention: This Bulletin only applies to vehicles sold in the U.S., Canada and Middle East Operations (MEO). Mexico and Export Regions should follow Bulletin 19-NA-018. Brand: If I am reading the 18-NA-355 that you posted for the c-7 corvette right, it looks likes if your corvette was made AFTER Feb. 1st of 2019 you should have the new fluid in it ? Yes, that's correct. Also 18-NA-355 TBS I posted is the latest version dated April 2020 which replaced the August 2019 version that was also posted above.Jan 4, 2022 · They were not willing to admit that this is a widespread problem. I showed them the TSB 18-NA-355 that describes the problem. They said a new TSB was released in 2022, TSB 16-NA-361, where it states that this is normal operation and replacing any transmission components will not resolve the problem. If I am reading the 18-NA-355 that you posted for the c-7 corvette right, it looks likes if your corvette was made AFTER Feb. 1st of 2019 you should have the new fluid in it ? Yes, that's correct. Also 18-NA-355 TBS I posted is the latest version dated April 2020 which replaced the August 2019 version that was also posted above.
The issue about the TCC shudder that many of us have experienced, and apparently carried over to a variety of GM models with the same trans assembly, seems to pretty accurately described in TSB #18-NA-355 (22 pages). I got the TSB number, because the dealer printed it in my service invoice (N/C, since I am under the powertrain warranty).. Jared
May 20, 2019 · Repeat steps 2 and 3, clean the transmission oil pan and magnet....." (3rd time the pan gets dropped) Version 1 dtd Jan 17, 2019: View attachment TSB # 18-NA-355 Part 1.pdf View attachment TSB # 18-NA-355 Part 2.pdf (this is the one with Corvette specific procedure, pg 25) TSB #18 NA 355 was For further information and the fluid exchange procedure, refer to GM corporate Technical Service Bulletin (TSB) 18-NA-355, available in Service Information. The Kit includes: • DT-52263-1 Block Assembly (with 10 foot long fluid drain hose and spring clamp) Bulletin No.: 18-NA-161 October, 2019 Page 3 Correction 1 Important: The following steps must be completed in order. Grasping or attempting to rotate cables could affect readings and should be doneafter performing the voltage drop measurement. Note: When checking voltage drop, the voltage drop should be performed with the fuelJul 29, 2019 · Shudder TSB 18-NA-355 has been updated 7/19. I just caught wind of a very important update to the transmission shudder TSB. Apparently, as of July 9th, the TSB has been revised to no longer require diagnostic procedures. This is obviously big news for those of us who have had to jump through dealer hoops to get anything done. Aug 18, 2020 · My 2015 is torn down as we speak for the torque converter flood back. There are two different TSB's here. The fluid flush to address the shudder is 18-NA-355. Mine is in for the delayed engagement issue where after sitting overnight, when going into drive there is a 3 second delay followed by a harsh "bang" as it engages. That tsb is 16-NA-014. Feb 12, 2023 · You are correct in generally the blue label isn't used on the 6-speed transmissions. 18-NA-355 applies specifically to the RWD 8-speed transmission, I had it performed on my Colorado. I have not seen any suggestion the blue label fluid would be detrimental to the 6 speed, but I don't think it's the answer. Page 2 March, 2019 Bulletin No.: 18-NA-355 Shudder Test Refer to the table below for conditions pertaining to specific applications. In each vehicle, constant throttle input on a smooth grade is desirable. PicoScope Measured Frequency is the approximate vibration frequency where TCC Shudder can be found, discussed in detail below. Apr 27, 2020 · Which revision of 18-NA-355 was followed and which fluid was used? It matters. Reply. steven says: May 5, 2020 at 6:42 am #16-NA-361 Document ID:4605342 The latest fluid was used. Reply. Received 34 Likes on 25 Posts. A8 Flush, TSB 18 NA 355 Cost $408.48. 2016 Z06 Z07 with 20800 miles. Experienced the shudder. Mild and intermittent, but there. I searched everywhere for the reference for this service to be done at no charge but no luck. I paid $408.48.Apr 13, 2020 · Took to Chevy dealership in Dec. of 2019 (@30,000 mi.) to have TSB 18-NA-355 performed. The. Mobil 1 Synthetic LV ATF HP transmission fluid swap was successful until last week when I hit around 52,000 mi. and the same problems began to emerge.. Just took the truck back in for service today. For example, the GM service bulletin 18-NA-355 for the 8-speed 8L90 transmission recommends flushing the transmission to fix 'Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH'. If you have the 6-speed transmission check if the TSB 21-NA-199 has been done to your truck, as it helps to keep the transmission cooler.Helpful websites. 18-NA-177 - RevBase - Chevrolet Bulletin RE: Procedure to confirm that shudder in Chevy Colorados and GMC Canyons is transmission related and if confirmed, directive to effect ...Posts: 23. TSB 18-NA-355 - After effects. Just recently had the 18-NA-355 service bulletin for my 17 SS A8 and noticing the transmission is acting much better but slightly different? The shudder is gone completely which is awesome but i am noticing the RPMs are idling a bit higher around 1800-2000 rpm in 8th at 65-70 vs 1500ish prior to the TSB.It's also possible you will have some warranty left on the 2018. If it was a certified pre-owned, the powertrain warranty covers transmission/TC for 6 years 100k miles, otherwise I think the 2018 was 5 years 60k miles. I would personally get the '18 with zero hesitation. Just make sure you insist on them doing the flush per TSB 18-NA-355.Transmission flush fixed the shudder. (Tsb 18-NA-355) Took my 2018 Colorado WT in for the flush at the Chevy service center I get all my routine work done at. It was all covered under warranty as I only have 18,900 miles on it. Glad the flush fixed the issue. Runs smooth now, and the shifting is like night and day. The whole process took about ...Assuming the A8 (not the A10 because your sig says you have a 2016 Camaro), it did receive a service bulletin about the first shift after a cold start, see below. Also make sure you have the latest transmission fluid that introduced in Jan 2019 to prevent transmission shudder, the service bulletin for that issue is 18-NA-355, flushing the A8 ...Title: #18-NA-355 - Shake and/or Shudder During Light Throttle Acceleration Between 25 and 80 MPH (40 and 128 KM/H) at Steady Speed - (Mar 30, 2020) Vehicle: 2016 Chevrolet Silverado - 4WD The document preview is shown on the right. To view the entire document you need to have a subscription. SubscribeAug 30, 2019 · The latest revision of the shudder TSB (July 8 2019 : 18-NA-355 TSB) now states to go ahead and just do the flush if it has not yet been performed. This is good news, and what GM should have done from the beginning with this latest fluid if they were so confident in it. Aug 5, 2019 · Shudder TSB 18-NA-355 has been updated 7/19 I just caught wind of a very important update to the transmission shudder TSB. Apparently, as of July 9th, the TSB has been revised to no longer require diagnostic procedures. If your car is a 2018, it has the A8 and not the A10. The latest transmission fluid (Mobil 1 Synthetic LV ATF HP, part number 19417577, blue stripe on the bottle and not black) that actually fixes the problem came out in Jan 2019 as part of TSB 18-NA-355, so unless your A8 was flushed with this specific fluid, it can develop the shudder..