4l80E intermittent "rev" when on hills

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4l80E intermittent "rev" when on hills

Home > Discussion Forum > Mechanic's Corner - Transmissions

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All Messages in Thread	Author	Date
4l80E intermittent "rev" when on hills	Charles	4-26-07
1992 34'Southwnd MH. Had tranny redone 1000 miles ago, after driving for an hour or so, when I pull a long hill under load(and the vacumn gauge goes to zero for awhile)there will be a momentary "rev". Sometimes once, but it has been as often as 3 times a hill. I can't tell if torque converter is unlocking or if the pressures drop, or what it is. It's not throwing any code. Shop wants to charge me to "Upgrade" the wiring harness, but I think it's internal. Ideas?