1999 Dodge Truck lock up torque

1999 DODGE TRUCK
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RANDY DUSTIN
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Transmission problem
1999 Dodge Truck V8 Four Wheel Drive Automatic

i have had past experince rebuilding transmissions this one has me a little stumped its stays in overdrive ok but somedays not everday it will shift in and out of lockup way way to often help
Mar 20, 2009 at 6:34 PM
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CARADIODOC
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The torque converter will unlock at wide-open-throttle and at minimum throttle. A dropout from the throttle position sensor can happen so fast that it doesn't set a fault code, but it's enough to command the converter to unlock. Try a new throttle position sensor.

If your transmission uses a throttle cable, it could be slightly mis-adjusted, although it would act up much more often. Engine rpm is one of the enabling conditions for converter lockup. At lockup around 40 mph, engine rpm could drop too low. Converter unlocks, . . . rpm goes up, . . . lockup occurs. This problem occurs around 40 - 50 mph. The throttle position sensor problem occurs based on throttle position, not engine load or vehicle speed.

caradiodoc
Mar 26, 2009 at 9:52 PM