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2003 GMC 2500HD 6.6 and Allison falls out of 5th
Posted to Transmission Forum on 1/23/2018 3 Replies

I've got a good one here. I'd love some help or direction if anyone could spare some of their thoughts. This truck is 4WD and has 190K miles. Motor runs fine, trans shifts great but after a few miles of being in 5th gear it may buck for a split second or two o... Login to read more.

3 Replies Received (View Replies)