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Old 06-20-2018, 10:06 AM
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Throwout bearing shaft play

I'm setting up a conventional external slave/clutch fork throwout bearing on a Tremec TKO xmsn. What would be considered normal radial play between the throwout bearing and the xmsn input shaft bearing retainer outer surface the t/o bearing rides on? Thanks.

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Old 06-20-2018, 10:50 AM
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make sure you check your bellhousing/block/crank as an assembly for concentricity and parallelism (using a dial indicator. Most Tremec sellers really like roller pilot bearings, which dont tolerate misalignment well, and neither do the bearings in the gearbox itself.

Whoever sold you the hyd. kit and your TKO should be able to supply you with the amount of radial play they (both) deem acceptable, this also keeps you from running afoul of any warranty issues with the hyd clutch or gearbox. Cover-your-butt 101.
If the gearbox seller and the hyd master/slave both give you the same're good.
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Old 06-20-2018, 01:03 PM
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Thanks, Autogear. I've done the checks you mention and all is within limits. Just didn't see any reference to the play I enquired about. Incidentally, I did contact Tremec about recommended pilot bearing vs bushing for their recommendation. Tremec said they have no preference. I went with bushing (oilite, confirmed non magnetic).
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