4l60e 550 hp
Just Friday on my way to work the truck chewed up the sun shell, car is still kicking though.
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GM part# 15724745 is the 4L80E T-Case adapter (Round 6-bolt) you will need.
I use 2wd 4L80E cores with fully splined output shafts & cut the output to the correct length for the application using a band saw.
Section the crossmember & use some 1/4 plate to extend the mount area of crossmember back.
Trans cooler lines off/for a '01-'06 GMT800 2500HD will fit a GMT900 truck.
Add a external neutral safety switch over the manual shift shaft, One for a 2007/2008 GMT900 truck will work, You need the Connector/Pigtail as well.
Some wiring required.....It's not that much! If you decide to do this, PM me & I can help.
You may be able to reprogram your existing T42 trans controller, If not.....Used one's are not expensive
Both driveshafts reworked.







