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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend> T-350 Forward/Direct Clutch Piston Seals
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Topic Review (Newest First)
03-29-2013 07:21 PM
Crosley
Quote:
Originally Posted by zardiw View Post
OK....Thanks Crosley!.......Yeah.....they both move...the Forward one hisses less and airs up better.....holds.

The Direct one moves/airs up......then settles back down...using 30PSI, but when I first hit it with the air there's more pressure (using a pressure regulator that leaks a little)......at 30 it won't stay aired up.......but it moves, so thanks!..

z


the bore area the sealing rings run in , need to be smooth, no ridges , grooves , burrs. Often the direct drum has a groove or 3 in it.
03-29-2013 06:44 PM
zardiw
Quote:
Originally Posted by Crosley View Post
you will hear some hissing with air check.

If the clutch pack piston applies with low psi air pressure (30) you are fine.

Air gets by things easier than oil does
OK....Thanks Crosley!.......Yeah.....they both move...the Forward one hisses less and airs up better.....holds.

The Direct one moves/airs up......then settles back down...using 30PSI, but when I first hit it with the air there's more pressure (using a pressure regulator that leaks a little)......at 30 it won't stay aired up.......but it moves, so thanks!..

z
03-29-2013 06:31 PM
Crosley you will hear some hissing with air check.

If the clutch pack piston applies with low psi air pressure (30) you are fine.

Air gets by things easier than oil does
03-29-2013 05:06 PM
zardiw
T-350 Forward/Direct Clutch Piston Seals

Are these really touchy or something.......I lubed them well and put them in the bore......tried that wire deal to guide them in but that really didn't do much.....they actually pushed in halfway easily.......but when I air test them there's a hissing.......

Took the direct clutch apart and looked at the seals.......they looked pretty good....but there's still hissing......

Kind of stuck here.....don't know why or where it's leaking.

Double checked to see the lips point the right direction...

Also, the hissing changes when I rotate them.....

Again...are these seals really fragile or something to where it's really easy to screw them up?

Anybody got any other ideas of where it's leaking?

All the rings on the pump shaft are now new......and they seem to be OK too......

z

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