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

Thank you both for responding. I've just finished draining the transfer case and it wasn't full and what little oil was in the case came out very slow. When it was just about done draining I could see pieces and particles blocking the drain hole. I then went t... Login to read more.

 

car Vehicle Data

2003 GMC Sierra 2500 HD SLE 6.6L

Engine6.6 L
Trans5-speed Automatic (Electronic)

car Vehicle Data

2003 GMC Sierra 2500 HD SLE 6.6L

Engine6.6 L
Trans5-speed Automatic (Electronic)