Quote:
Originally Posted by slick copper
You know that's something I'd like to know myself. Do you know how to tell? Someone told me it was the Allison. Sorry about the upside down pic btw. I'll have to fix that later tonight.
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If your 2500HD 8.1L truck is auto, It has an Allison 1000 5 speed.
Do Not run Dexron VI ATF it this trans!! Run a Allison approved ATF
http://www.allisontransmission.com/p...highway-fluids