Cseybert
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I was checking your tracking sheet my 22 3500 HO was built in March 2022. I noticed on your sheet there is only one failure before March 2022. Am I correct in saying that?I have it in good authority that the issue started at Aisin. It wasn’t an assembly error but rather a batch of snap rings that were out of spec. Somehow made it past quality control. They fail internally and fall out of position on the K1 drum. When this happens you lose 1-4 gears instantly.
They initially were rectifying the failed transmissions by installing completely new transmissions but that was suspended starting around 1/11/23 when they released the TSB (21-002-23) for this particular issue. There have been numerous cases where trucks that received replacement transmissions suffered another failure of the same type and are subsequently out of service again. The current method to address the issue is ordering a “parts kit” that includes all necessary components to fix the failed transmissions. Some of the parts in the kit are on extended backorder causing significant delays.
If you would like, I can add your truck to the tracking spreadsheet I have going. There are currently 132 trucks on there with confirmed K1 failures.


