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4L60E to 6L80E swap, can it be done?

4L60E to 6L80E swap, can it be done?

Postby Desert Mad Man [OP] » Nov 15 2010, 7:29pm

Ok, since I just recently came out of a car that had a 6L80 in it, and I know the 2008+ trucks have 6 spds in them, what would it take and how difficult would it be to swap out the 4 spd in my 2007 GMC 4x4 (new body style) for the 6 spd box? Could I use the same transfer case, drive shafts and mounting hardware that I currently have in the truck, or would I have to relocate the trans support cross member and get a shorter rear drive shaft and longer front shaft to account for the potentially longer trans case? What about electronics for the trans? Would I require a new computer so that it knows I have 2 more gears now?

I know this would be expensive to do, but I was just wondering if some of the folks with more knowledge than I have about these trucks could weigh in and let me know if I am nuts in my thought process.
2007 GMC Sierra Crew Cab, 6" Fabtech suspension lift, LT285/65R20 BFG A/T's, Magnaflow muffler with dual 3" stainless exhaust. 3" stainless Creative Innovations full length tube steps.
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Re: 4L60E to 6L80E swap, can it be done?

Postby katjar503 » Nov 16 2010, 4:02am

Not sure my self but i will look into it for you.
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