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4L80E shifting problem

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New User

Jul 8, 2005, 7:27 PM

Post #1 of 4 (9019 views)
4L80E shifting problem Sign In

I have a 1996 Chevy 3500 dullaly with the 4L80e transmision. The tranny will pull fine shift great most the time, but sometimes it will act as though the converter has just disengaged. The RPM will race up unchecked and the tranny will not hook back up until I completly let off the throttle. Any ideas? Please help!
Ed Keck

Tom Greenleaf
Ultimate Carjunky / Moderator

Jul 9, 2005, 5:37 AM

Post #2 of 4 (8997 views)
Re: 4L80E shifting problem [In reply to] Sign In

First - make sure it's full of fluid and if not find out why!

Next - check color of fluid on white paper. If you don't say "red" then it's probably toast!
Long retired now

New User

Jul 9, 2005, 9:39 AM

Post #3 of 4 (8995 views)
Re: 4L80E shifting problem [In reply to] Sign In

fluid is fine, good red color, level fine what now? The tranny does not slip pulling a load 1st through 3rd. I just don't understand!
Ed Keck

Tom Greenleaf
Ultimate Carjunky / Moderator

Jul 9, 2005, 11:29 AM

Post #4 of 4 (8987 views)
Re: 4L80E shifting problem [In reply to] Sign In

Both good signsSmile From here I would take the veh to a reputable trans shop for a test drive and their asessment with the veh in front of them and a quote on a fix. This should be free.

Never hurts to do a check for wiring and vacuum leaks yourself.
Long retired now

4L80E shifting problem

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