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Re: 6 speed Allison??
Posted to HD/Fleet Forum on 2/15/2001 1 Reply

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Is the shifter set up as follows: 1-2, 3-4, 3-5, 3-6? If so, MT40. Also the valve is a hydraulic retarder that is run by the pedal on the floor. If the retarder valve sticks, the trans will be extreme... Login to read more.

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