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4L80E loses 1st when warm/slow reverse engagement
Posted to Transmission Forum on 5/22/2005 2 Replies

Hello all,

My friend is a MAC Tool guy and has a '97 GMC Step Van with a 6.5 diesel/4L80E tranny. He has a problem with the tranny that started with slow reverse engagement, no downshifts unless done manually, and now he has lost 1st gear when warm. When the... Login to read more.

2 Replies Received (View Replies)