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4L80E shifts hunting
This truck shifts very rapidly between gears under moderate to heavy loads. The more throttle you give it the worse it gets. I can see that the PCM appears to be commanding these shifts but I don't understand why. Not sure what to make of these waveforms. As y... Login to read more. ![]()
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| Engine | 6.5 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
1998 Chevrolet C3500 Cheyenne 6.5L
| Engine | 6.5 L |
| Trans | 4-speed Automatic (Electronic) |

9 Replies Received
9 Replies Received