Clai9

iTrader: (3)

What causes the lugs for the retainer ring on the input shaft drum of 3-4 clutches on a 4l60e to shear off ? This is the second time it has happen and I need a fix.

performabuilt

iTrader: (25)

Line to high, excessive clutch clearance have been the issues I have noted.

big wally 55

I have seen that happen when a very thin retaining ring is used to try to get "just 1 more clutch " in the drum !! The retaining ring will flex up and break the lugs . But yes too high line pressure will do it also .
John

flynlow3

iTrader: (2)

Ok. Too high line pressure? Now im worried...I was talked into going with a servo bigger than the corvette servo as well as going with a shift kit. I was told higher line pressure=good. Nothing was mentioned about cause and effect of too high line pressure!

Should i be worried?

big wally 55

Any time you increase line pressure you put more stress on "hard parts " . That's why you go with a better sun shell and band and also friction material in clutches ! The shift kit will not normally increase line pressure to a problem level . When you hear of guys turning the screw on the force motor and addind shim to the pressure regulator valve is when you risk blowing parts up !

FLT

iTrader: (1)

I have also seen the things above case this failure. Another thing that I believe will case this is when the feed hole for the 3rd clutch is to large along with the info stated above. I have been working on this issue for a bit now and in the last 2 years we have not seen this failure. It really is a matter of finding a good balance in the unit. Good luck, Vince.

Clai9

iTrader: (3)

Will the line pressure fluctuate if you have a high rpm miss (about 6000 rpm) and cause this to happen? My car has a miss and trans broke after a couple of passes down the track

Brian

usd2sing

iTrader: (15)

this is very interesting.
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