4l80e

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4l80e

Home > Discussion Forum > Mechanic's Corner - Transmissions

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All Messages in Thread	Author	Date
4l80e	larry mount	7-29-09
I have a 1993 ck3500 4x4 Chevy p/u that has a 4l80e transmission attached to a 454 7.4l engine. In recent months when going up a hill, passing while at speed or increasing throttle when already at 2000 rpm the transmission will, instead of downshifting from overdrive into high gear, will shift into no gear and the engine will quickly overrev. If I press the accelerator all the way down it will kick into gear and hold. I can also move the gear selector to 3rd and it will hold. I changed the trans fluid and filter but the problem remains. There was no debries in the pan and the fluid was not burnt.

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