bowtienut

iTrader: (1)

It won't do it with a mild stall.
Mine didn't do it with the Yank 3000, which was a soft hitting TC.
The Edge 3400 hit more like your typical 3600; that's when it reared its head.

And I should have paid more attention to what EW said earlier.
The OBD1 fix for mine was NOT disabling the VSS error (too many years and bad memory!). Moving the 1-2 WOT shift threshold down to 1 mph and letting it shift on the rpm trigger was the fix. Edited post above.

Ed Wright

iTrader: (1)

That will fix a fairly low stall like that, takes a code hack to make it shift with a 4000 + converter.

96capricemgr

iTrader: (1)

Sounds like a shitty tranny builder is your problem. I don't think anyone actually any good uses kevlar in this tranny. Even without a tune for a stall wall the 3-clutches would not be what is hurt unless you put it into stall wall constantly and drive around in only third.

There are a lot of shops who will take your money to "rebuilt" a 4L60E and relatively few who actually do a good job.

bowtienut

iTrader: (1)

Well.....it works just fine for my 8" ATI, even flashing to 5600 with the little shot of juice.

NewOrleansLT1

Works for my 9.5" 4000 also..

Ed Wright

iTrader: (1)

Guess your lucky. That won't fix a lot of them. My 8" ATI needed the code hack.
And, after that setting the up shift MPH to 1 MPH was not needed.

TwoFast4Lv

iTrader: (8)

My 3L80MTB Shift every time I push the shifter even coming out of the hole at 5,600-5,800