4l60e no shift

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Dec 2, 2007 | 01:06 PM

vegachevy

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Joined: Dec 2007

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4l60e no shift

I have a 94 4l60e and it wont shift unless you let up on throttle and will not shif to overdrive at all?

Dec 2, 2007 | 01:52 PM

sofakingdom

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Car: Yes

Engine: Usually

Transmission: Sometimes

Axle/Gears: Behind me somewhere

Re: 4l60e no shift

e = electronically controlled

Meaning, if it EVER shifts, the trans is fine. It's just doing what it's being told.

Sounds like the ECM is confused. Probably the MAP sensor vacuum line is disconnected, so the ECM thinks the driver has the car 100% floored 100% of the time, and is commanding the transmission accordingly.