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Username Post: hydraulic slave cylinder        (Topic#352072)
Mmo 
Gold Supporting Member
Posts: 11
Mmo
Age: 51
Loc: Toronto, west side
Reg: 09-24-17
07-17-18 03:14 PM - Post#2740323    

for my 1972 Blazer: has hydraulic clutch conversion. the Wilwood puller style barely works and leaks quick, twice. have played with adjustment and it likely doesn't throw far enough. i aim changing the slave to a push style. but... can't find one. few plastic aftermarkets, dealer is no help nor the local part shops. Howe and Wagner might work.
i think, getting one that would fit the last year or so of the external slave cylinders from a chev pick up truck. bell housing the same.
Saginaw 4 speed tranny
wilwood master cylinder
would like a real GM one, hopefully with mounting bracket.

thoughts, rude comments or suggestion?
cheers



Thanks Fellas
mighty copper Blazer


 
Ecklers

raycow 
Honored Member
Posts: 27764
raycow
Loc: San Francisco, CA
Reg: 11-26-02
07-17-18 03:35 PM - Post#2740325    
    In response to Mmo

I agree. A stock 60-62 truck bellhousing will do exactly what you want, and I believe new slave cylinders may still be available for them. If not, I know you can get the rebuild parts for a used slave because that's what I did on mine. You won't need a separate mounting bracket. The slave bolts directly to the bell. Make sure to get the fork, too. They are different from the mechanical linkage forks.

One minor hiccup: Depending on what trans you are running, you may need to open up the center hole in the bell. This is not a difficult job and any machine shop should be able to do it. GM truck bellhousings were 4-5/8" through 1967 and 5-1/8" 68-up.

Ray

Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.


 
Mmo 
Gold Supporting Member
Posts: 11
Mmo
Age: 51
Loc: Toronto, west side
Reg: 09-24-17
09-13-18 10:44 AM - Post#2746041    
    In response to raycow

hey Ray
so my troubles continue, as the Wildwood hydraulic slave leaks. likely due it being a puller style. tried different O rings, welded custom bracket but likely the geometry of the moving clutch fork puts side pressure on the plunger rod.

want a more stock pusher style slave but won't fit due the headers. so looking at shorty headers, then getting the stock like slave cylinder installed.

its actually a 1972 blazer with a 454 crate engine, but the 73 and up blazer former didn't respond.

so your thoughts on the correct shorty headers (found some Flo Tech ones that appear correct) and more importantly the best brand of slave cylinders for Chev/Saginaw 4 speed trannys?

real problem.
sincerely,
Markus



Thanks Fellas
mighty copper Blazer


 
raycow 
Honored Member
Posts: 27764
raycow
Loc: San Francisco, CA
Reg: 11-26-02
09-13-18 01:13 PM - Post#2746046    
    In response to Mmo

Markus, you didn't say what kind of bellhousing you have. If it is a stock 72 truck bell and you are using the stock crossmember mounts, this places some fairly narrow limits on what other bell you can use.

A stock 60-62 truck bell has the same mounts and is designed to mount a push-type slave on its right side. This would give you the easiest install, and you can still get a new slave for it from Rockauto. Unfortunately, I can't offer any help regarding header clearance issues.

If you want to keep your stock 72 bell, Advance Adapters, Novak, and probably other Jeep engine swap vendors sell a bracket to mount a push-type slave using two of the existing holes for the bell to engine bolts. Those vendors will be happy to sell you a slave which fits their bracket, but I don't know if they will tell you what OE application the slave was taken from. Here again, I haven't got a clue about header clearance.

The trucks went back to hydraulic linkage for 1984-95, again using a push-type slave mounted on the bell, but on the left side this time. If you don't need the stock 72 crossmember mounts, one of those bells might be an acceptable choice, but they do come with a few hiccups you may want to know about first. This is a full-circle aluminum bell with no bottom cover (meaning you can't even see the clutch unless you pull the bell off the engine), and it requires you to use a block-mounted starter. Also, the bell has a 5-1/8" center hole, so you will need a spacer ring if your Saginaw has a 4-11/16" front bearing retainer.

Finally, if your headers won't clear ANY push-type slave, you could use a hydraulic release bearing as an absolute last resort. These were used on the trucks starting with 1996, and there are several aftermarket versions available for rod builds. However these bearings can be more finicky than an external slave, so please don't take this as a personal recommendation.

If you have questions about any of the above, feel free to ask.

Ray

Those who choose an automatic transmission want transportation. Those who choose a manual transmission want to drive.


 
Ecklers

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