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I'm amazed to hear all of these stories of bad experiences.</div>
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Many production cars and race cars have used these for years. Saab used them for ~40 years.</div>
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Many aftermarket manufacturers make them. Tilton, QuarterMaster, PowerTrain, ...</div>
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Are people using poor quality units, or are they being installed incorrectly?</div>
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Remember that aftermarket/race clutches often require 50-100% more force to disengage than the stock clutch, especially the smaller units.</div>
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Has anyone observed or measured the twist and bend on the stock cross shaft when paired with a race clutch?</div>
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I guess if your bushings are worn enough, then the assembly can tolerate this distortion.</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Fot <fot-bounces@autox.team.net> on behalf of Mike Harmuth via Fot <fot@autox.team.net><br>
<b>Sent:</b> Monday, August 19, 2024 8:01 AM<br>
<b>To:</b> Bert Brown <moosehd2@pacbell.net><br>
<b>Cc:</b> Friends of Triumph Group Email <fot@autox.team.net><br>
<b>Subject:</b> Re: [Fot] TR6 Race Clutch Release Bearing - Hydraulic or Standard wSlave Cylinder?</font>
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<div dir="ltr">Sebring 2020, internal throwout bearing leaking.
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<div dir="ltr" class="x_gmail_attr">On Mon, Aug 19, 2024 at 1:14 AM Bert Brown via Fot <<a href="mailto:fot@autox.team.net">fot@autox.team.net</a>> wrote:<br>
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<div dir="ltr">I was just at the Monterey Historics this weekend hanging out with 2 racer friends and one of their friends pops into our pit space with the news that his internal hydraulic release bearing leaked in the Friday session and the clutch was inoperable.
He had a Cobra and pulling a trans in one of those cars is an absolute bitch! He wanted to know what our experience was with these bearings and if we had a replacement. Everyone said they have had many problems with hydraulic leaks with these internal release
bearings and "no", they didn't have a spare. </div>
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<div dir="ltr">Everyone's vote at our pit was to use the external linkage and slave cylinder. When I used to go to the track with my car I always carried spare hydraulics and the external cylinder on my Spit was a snap to change.</div>
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<div dir="ltr">By the way the Cobra guy couldn't find a replacement at the track and loaded his car on his trailer and missed his race. All because of a damn internal hydraulic release bearing that he never thought he would have to replace! Racing is fun!</div>
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<div dir="ltr">Bert Brown</div>
<div dir="ltr">ex GP Spitfire</div>
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<div>On Sunday, August 18, 2024 at 07:59:48 PM PDT, Charly via Fot <<a href="mailto:fot@autox.team.net" target="_blank">fot@autox.team.net</a>> wrote:
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<div dir="ltr">Mark, I have always run the 'stock' style T.O. bearing. I've run several different clutches, from Laycock to Tilton, and have always had good luck with it.<br>
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<div dir="ltr">I've known several TR racers who have used the 'hydraulic' type mechanism and have always had problems at the track and have been difficult if not impossible to fix.<br>
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<div dir="ltr">My vote is the stock linkage and a Tilton clutch, <br>
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<div dir="ltr">BTW, car is still for sale.<br>
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<div dir="ltr">Charly Mitchel<br>
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<div dir="ltr">TR6 #44<br>
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<div dir="ltr">On Sun 18/08/24 7:05 PM , Mark Cook via Fot <a href="mailto:fot@autox.team.net" target="_blank">
fot@autox.team.net</a> sent:<br>
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<div dir="ltr">> So, I one of my TR6s has a close ratio transmission with Mcleod hydraulic<br>
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<div dir="ltr">> release bearing, which is leaking. While there, trying to decide on<br>
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<div dir="ltr">> whether to go back to a stock bearing, yoke etc, with an external slave<br>
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<div dir="ltr">> cylinder. For reference, as part of the engine rebuild, going with the<br>
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<div dir="ltr">> Racetorations Arrow billet crank, 7 1/4" lightweight flywheel, cover<br>
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<div dir="ltr">> and four paddle clutch disc. <br>
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<div dir="ltr">> Not keen on having to remove the transmission for seal leaks related to the<br>
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<div dir="ltr">> hydraulic release bearing. At the same time not familiar enough to know if<br>
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<div dir="ltr">> a hydraulic release bearing's failure rate is any worse than a standard<br>
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<div dir="ltr">> release bearing. Everything I have read makes the hydraulic bearing seem<br>
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<div dir="ltr">> more sensitive to initial set up as well.<br>
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<div dir="ltr">> Thoughts?<br>
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<div dir="ltr">> Thanks,<br>
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<div dir="ltr">> Mark Cook<br>
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<div dir="ltr">> <a href="mailto:arly@mitchelplumbing.com" target="_blank">arly@mitchelplumbing.com</a><br>
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