So, if we leave as is and don't repair it, the grinding synchro rings will grind themselves down smooth.I got mine back today after having the TSB done. My service manager previously said that the -C revision had been superseded by the -D revision part and told me that I would be receiving the new part. Upon checking the invoice at pickup, I noticed they installed a new -C part. He told me that he checked with his parts manager and they confirmed that it still showed the -C rings as being correct for my build date and the -D rings were applicable for later build dates. It doesn’t even seem that the model years are the delineating factor but rather build date ranges. Additionally, the service manager said that the old parts appeared to not be machined smoothly on the edges, almost like there were raw metal imperfections on the synchro rings that nobody filed down prior to installation. He said that the new parts they installed looked much better than the old ones and were smooth on the edges. His guess is that all of the bad synchro rings installed at the MAP had the same issue as they were installed as-received and not smoothed out prior to installation. I obviously can’t confirm or deny that but it makes sense.
All of that being said, for the afternoon I’ve had it back, I haven’t heard any noises and the transmission seems to shift smoother than before. Mine was one of the transmissions making the grinding noise at all temps, hot or cold. Time will tell how it holds up but I like how it feels so far. There were times prior to the TSB being done that it shifted so rough that I began to believe I had forgotten how to drive a manual. How it felt today seems like how it should have felt the entire time.
Best of luck to all of you in this journey!
Warmer weather her in MN I don't hear the grinding now. 44 this morning and no grinding sound. Will have to wait until next winter now to have the dealer listen...
Sponsored