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Old 02-28-2016, 11:44 PM   #14
clinebarger
Senior Member
 
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
Re: Bought this beast today

Quote:
Originally Posted by 65standard View Post
Engine is L18
Trans is M74.
That's the code for a 5 speed Allison 1000, 4L80E=MT1, 4L85E=MN8.

I have never seen a Allison in a GMT400 3500HD cab & chassis before, But I like seeing things I've never seen before....
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