apix17
Contributor
Posts: 155
Loc: San Francisco Area
Reg: 12-22-07
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10-05-20 07:08 PM - Post#2804921
I am just discovering hydraulic throw out bearings. Would like to know if anyone has experience with them and if so what is your opinion as to operation and reliability. Thanks.
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 beagrizzly
"12th Year" Gold Supporting Member
Posts: 2183
Age: 70
Loc: south texas
Reg: 08-04-12
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10-06-20 06:24 AM - Post#2804947
In response to apix17
apix,
The factory has been using hydraulic throwout bearing for over 50 years. The first one I has was in 62 half-ton, 292 I owned. They are used in everything from said pickup to F-350 Diesels. There was one in my 96 Z-28.
They used brake fluid, so you had to be careful if you topped it off. If you used ATF, you were in trouble.
As far as reliability, I had no issues with any of them. 250,000 miles on the F-350.
Hope this helps.
Griff
if you're gonna be a bear..................
1960 Biscayne (the 6T)
2005 Yukon XL
2007 GMC Sierra Classic 8.1
2009 Silverado
2011 Escalade ESV |
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Rick_L
Member #409
Posts: 27814
Loc: Katy, Tx, USA
Reg: 07-06-00
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10-06-20 05:13 PM - Post#2805001
In response to apix17
There's more than one way to do a hydraulic clutch. I don't think the factory used a hydraulic throwout bearing until the 90s.
Anything prior to that was a slave cylinder rather than a hydraulic throwout bearing, including the 93-97 Z-28. All the truck deals from the 60s on were master/slave setups. A master/slave setup uses a clutch fork. A hydraulic throwout bearing does not.
To me, fitting a clutch master cylinder to a car that doesn't have one is a PITA. The only reason to do it is because the car has been modified so much (or butchered) so that stock mechanical linkage can't be used - or that you have a transmission setup like a T56 6 speed that used a hydraulic TOB from the factory and using mechanical linkage would be very difficult because of the way the bellhousing is built.
The aftermarket hydraulic TOBs had a reputation for leaking prematurely for many years. I don't know if they are any better recently.
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beagrizzly
"12th Year" Gold Supporting Member
Posts: 2183
Age: 70
Loc: south texas
Reg: 08-04-12
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10-08-20 11:54 AM - Post#2805118
In response to Rick_L
Rick,
You are correct. I was just referring to the hydraulics, and that they were pretty dependable. I have never run an aftermarket tob. so cannot speak to the leak issues.
I replaced a clutch in a Ford Ranger that had one. I believe it was a late 80's.
Personally, I have no love for mechanical linkage clutches. I know.........I know. DZ will probably jump in here. As much as I respect his opinions, I stll have mine. I love the hydraulic setups.
Griff
if you're gonna be a bear..................
1960 Biscayne (the 6T)
2005 Yukon XL
2007 GMC Sierra Classic 8.1
2009 Silverado
2011 Escalade ESV |
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