[Fot] TR6 Race Clutch Release Bearing - Hydraulic or Standard w Slave Cylinder?

[Robert Lang]

 Hi,
As others have already mentioned, the annular throw out bearing setup can have issues and resolving them at the track is a PITA. For that reason, I've stayed with the stock setup and external hydraulics. I just do a few things to make sure the weak spot for the stock setup won't fail - namely, drill and pin the clutch fork to the cross shaft. Use a 3/16 or 1/4 inch roll pin. With that setup, you can easily remove the taper pin and the roll pin to get the cross shaft out. You want this because there's a good chance at some point you'll need to access the front layshaft cover for leaks or layshaft replacement. But, I've been using this setup for years with excellent reliability and EASY maintenance on the track or on the road.
This also assumes a stock transmission... or at the very least a stock-derived bell housing. If you have Toyota or other, you may have different options.
The key for the annular bearings is to get the clearances set so you can over-operate the hydraulic bearing and it's probably best to do that on the bench and then document what you did for future reference.
Regards,Bob Lang



    On Sunday, August 18, 2024 at 10:15:41 PM EDT, Mark Cook via Fot <fot at autox.team.net> wrote:  
 
 So, I one of my TR6s has a close ratio transmission with Mcleod hydraulic release bearing, which is leaking.  While there, trying to decide on whether to go back to a stock bearing, yoke etc, with an external slave cylinder.  For reference, as part of the engine rebuild, going with the Racetorations Arrow billet crank, 7 1/4" lightweight flywheel, cover and four paddle clutch disc. 

Not keen on having to remove the transmission for seal leaks related to the hydraulic release bearing.  At the same time not familiar enough to know if a hydraulic release bearing's failure rate is any worse than a standard release bearing.  Everything I have read makes the hydraulic bearing seem more sensitive to initial set up as well.

Thoughts?

Thanks,

Mark Cook




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