Brand New 4L80e 4wd

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Originally Posted by kbracing96

A 4x4 60 to 80 swap is more involved as the tranny/transercase is moved back about 1 11/16. A stock front drive shaft from a 2500/3500 truck (you must tell them its for a 5speed trans to get the right one from a junk yard) will fit and you have to shorten the rear shaft 1 11/16, as well as cutting the cross-member and moving it back. Also, as stated the input gear on the transfer case must be changes out the the 4l80 gear on the autotrack and a special made one for the AWD tranfercases. It also uses a different adapter between the tranny and transercase then the 60 does. It is much more involved then 2wd swaps.

PS, Would be nice to have this tranny for a spare, ;) You should hold it for me until the LS1truck track day in case history repeats its self, :lol:

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Man that is some good good info. Let me make sure I am seeing this right.
AWD truck SS or RCSB should not matter either one will use a 4l80 and a 5 speed 2500hd shaft? I am so excited. No 300 dollar shaft for me. Woooo Hooooooooooo. Thanks for posting that.

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Originally Posted by zeake

Man that is some good good info. Let me make sure I am seeing this right.
AWD truck SS or RCSB should not matter either one will use a 4l80 and a 5 speed 2500hd shaft? I am so excited. No 300 dollar shaft for me. Woooo Hooooooooooo. Thanks for posting that.

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Yep, it should. I just had to get one ($50) from a junkyard (while on a PT.net GTG trip, lol) to replace my expensive one I got when i first did my swap that was custom made with a stupid CV joint that failed, that it didn't NEED!

The first junk yard one I got I told then I needed one for a 3/4 ton 4 speed tranny and it was too short. They said it should fit 1/2, 3/4, 1 ton. Had him look up the shaft for a 5 speed trans and it was for 3/4 and 1 ton only. Got that shaft and it was perfect length, just like the custom made one.

So now I have both the custom front and rear shaft I had made for my truck are sitting in my shop with about $600 into them and they are useless (rear shaft has a vibration that 2 different shops can't get out of it) and my shortened stock rear drive shaft (didn't know he could shorten and balance a 5" aluminum shaft) and a $50 stock front shaft are in the truck, lol.