Quote:
Originally Posted by Wide Open
I assume you are keeping the 4L80E behind it when you swap?
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There's no reason to not keep the 4l80e. It was behind the 8.1 in 01 and 02 3500HD trucks(15,000 GVW) and the 3/4 ton suburban and avalanche.
And an Allison won't fit without a body lift.