Quote:
Originally Posted by kevingross
Good luck with that. The problem is that it is pretty much impossible to inspect many of the bearing races without destructively disassembling the bearing. But if you're doing the work yourself, and willing to go back in there in a couple years when the bearing(s) really start to fail, you can take that chance.
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When I rebuilt my 915 I took the disassembled transmission to a friend who owned a shop and (years ago) raced IMSA. He guided me through which components to replace, which included the expected wear items but also two specific bearings on the pinion shaft (999-052-043-00 cylindrical roller bearing and 999-110-146-01 four-point bearing). Per Kevin's point, he didn't attempt to inspect these and I don't remember why he singled these out, but he knew the transmission had been club raced and would continue to be used on track. So, maybe it was a preemptive measure, given the high loading on these bearings. I also installed the Wevo one-piece bearing retainer plate.