The Technical Service Bulletin (TSB) #17-01-046 for this recall was published on June 3, 2017.2 Refer to . Hyundaitechinfo.com for the latest TSB.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.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 ...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.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.Note: a copy of the GM service bulletin 18-NA-355 can be found online. Local Transmission Shop to the Rescue! The problem with the 8L90 and 8L45 transmissions is certainly not unique, and really points out the importance of using the right transmission fluid!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 ExchangeIf 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.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 Drives: 17 2SS, 8L90, Cam, Heads, E85. Join Date: Dec 2016. Location: US. Posts: 1,156. Anyone done the 18-NA-355 TSB Themselves? I am way out of warranty and had the first TSB done, but not the final 855 tsb with the new Mobil1 LV fluid (19417577) and machine flush. I kind of don't even want to know how much the dealer would want, and yeah I ...Feb 24, 2021 · 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... 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). 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-142Repeat 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 wasAccording 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. 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.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. 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 just took my vehicle into the dealership and they performed the testing required per TSB 18-NA-355. They could not get the pco-scop to register a high enough vibration so they would not warranty the repair. I believe this was because the last TSB 16-na-175 fixed most of the vibration and the small vibrations would not register per 18-na-355.Aug 14, 2019 · 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. 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.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.”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 ... The Technical Service Bulletin (TSB) #17-01-046 for this recall was published on June 3, 2017.2 Refer to . Hyundaitechinfo.com for the latest TSB.18-NA-355 TSB (Technical Service Bulletin) which I think is for the transmission fluid flush, 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.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...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 diagnostic procedures. This is obviously big news for those of us who have had to jump through dealer hoops to get anything done. 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 ... Jun 18, 2019 · 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 ... GMC TSB 18-NA-355 Make: GMC 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: 2017-2019Canyon 2018-2019Canyon All Terrain 2017-2019Canyon Denali 2017-2019Canyon SL 2017-2019Canyon SLE 2017-2019Canyon SLT 2015-2018Sierra 1500Jul 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. 18-NA-355 and 19-NA-121 have been updated effective July 9, 2019 to eliminate the diagnostics portion within the TSB's and the labor times have been updated to reflect the removal of the diagnostic procedures. Vehicles presented with suspected shudder within the published build dates should have the prescribed fluid exchange procedure performed.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 fuel 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. Illinois. Oct 25, 2021. #16. AngryScientist said: 18 Chevy Colorado V6/8-sp trans. 29000 miles. Just developed the dreaded, well known shudder issue on light acceleration. There is a TSB out there to flush the trans with new Mobil 1 Synthetic LV ATF HP fluid; which allegedly corrects the issue in the torque converter clutch area if the wear is ...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 ExchangeHad 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.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.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. SubscribeService 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). 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 ...Jul 13, 2020 · Note: a copy of the GM service bulletin 18-NA-355 can be found online. Local Transmission Shop to the Rescue! The problem with the 8L90 and 8L45 transmissions is certainly not unique, and really points out the importance of using the right transmission fluid! 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.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. Subscribe 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.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.18-NA-355 and 19-NA-121 have been updated effective July 9, 2019 to eliminate the diagnostics portion within the TSB's and the labor times have been updated to reflect the removal of the diagnostic procedures. Vehicles presented with suspected shudder within the published build dates should have the prescribed fluid exchange procedure performed.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-VMar 29, 2023 · 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 ... 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.Sep 6, 2019 · 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. Aug 5, 2021 · 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. 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.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). 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.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 ...Technical Service Bulletins. Technical Service Bulletins (TSBs) are recommended steps and procedures for repairing vehicles. A TSB is issued by an automaker when there is a growing trend with an unanticipated problems. The Silverado 2500 has been assigned 4536 TSBs, the most of any Chevrolet vehicle. 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.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 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. 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. 18-NA-355 TSB (Technical Service Bulletin) which I think is for the transmission fluid flush, 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.Oct 16, 2022 · 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... 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.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.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 ...Evidently that one and 18-NA-355 have just been updated with the new information and keep their #s. 2017 GMC Canyon Denali V6 CCSB 4X4 [/QUOTE The TBS # on the work order for my 2019 Colorado was 18-NA-355. 20 qts triple flush 7/29/2019The 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 ...Feb 20, 2019 · 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. 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.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 ...Dec 13, 2018 · 18-NA-355 and 19-NA-121 have been updated effective July 9, 2019 to eliminate the diagnostics portion within the TSB's and the labor times have been updated to reflect the removal of the diagnostic procedures. Vehicles presented with suspected shudder within the published build dates should have the prescribed fluid exchange procedure performed. Sep 6, 2019 · 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. 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...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).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 ...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.Jul 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. This problem currently affects 11 different models across 3 different OEM brands for the model years between 2015 and 2019. After implementing several fluid revisions, GM’s latest solution (TSB 18-NA-355) is lengthy, complicated and expensive. ItAug 14, 2019 · 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. Bulletin No.: 18-NA-355 August, 2019 Page 15 5181401 18.4. Shut the engine off once 16 quarts of fluid have been collected. 18.5. Properly dispose of the collected transmission fluid. 19. Raise the vehicle. 20. Remove the DT-52263-2 Cooler Line Plug from rear differential and install the transmission oil cooler line using a new retainer clip. 21.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 ...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.The Technical Service Bulletin (TSB) #17-01-046 for this recall was published on June 3, 2017.2 Refer to . Hyundaitechinfo.com for the latest TSB.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).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 ...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 diagnostic procedures. This is obviously big news for those of us who have had to jump through dealer hoops to get anything done. . Shudder TSB 18-NA-355 has been updated 7Chevrolet TSB 18-NA-177. Some customers may comment on 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. 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. Jun 23, 2017 · Additionally, Hyundai increased the 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. If you do not get it done by then, you will have to pay for ...
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