When I am reversing this truck, usually with a load and in a turn, it likes to jolt in speed all of a sudden. If the stick is kept in the same position during and after this jolt, the speed is on rabbit (so to speak). If I release the stick into neutral after the jolt, everything returns to normal until I put the truck under load and reverse.
Forward works as expected.
We have had several repair companies come out to diagnose this problem but they all left without fixing or offering any solution.
What would cause this sort of behavior?
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