Power Master Cylinder

[jocko]

They should have both. I like to buy this kind of stuff local also - much easier to return, which seems to be necessary all too often. I believe the only difference between power and manual mc for a given configuration is the depth of the pushrod hole in the piston. If I recall, the power mc has the shallow hole and the manual mc has the deeper one, but it’s been awhile... How did you determine the one you got was a manual rather than power? I’m pretty sure last one i did this I got it at OReilly - for a 71 C20.

[LockDoc]

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This Raybestos master cylinder (RMC39075) is listed as being for a 3/4 ton with power brakes. Here are the cross reference numbers for other suppliers. I don't know how current this list is or if part numbers are still good.

[rcazwillis]

Originally Posted by LockDoc

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This Raybestos master cylinder (RMC39075) is listed as being for a 3/4 ton with power brakes. Here are the cross reference numbers for other suppliers. I don't know how current this list is or if part numbers are still good.

So the 3/4 ton should be the same? I was wondering if there was a difference.

[rcazwillis]

Originally Posted by jocko

How did you determine the one you got was a manual rather than power? I’m pretty sure last one i did this I got it at OReilly - for a 71 C20.

The deep hole in the plunger. Oreilly said they would order them to see what works. May go with that option.