H3 i5 with 4L60e swapping to 6.0

[kerrige]

Swapping a 2008 6.0 from a 2008 2500hd into a 2008 H3 i5 keeping the original 4L60e. Swapped the bell housing, but hit a snag. The factory trans has no speed sensor. So now I am trying to figure out how to control the factory transmission.

[1364838952]

Are you keeping it 4x4? If so your OSS (output speed sensor) is actually in the transfer case NOT in the transmission. If you are dropping the t-case and going to 2wd, or rear wheel drive only, then your trans is going to have to be modified with a 2 wheel drive output shaft, 2 wheel drive extension housing, and a speed sensor in the ext. housing.

Also, you CANNOT just swap the bell housing! The I5 Hummer H3 trans uses a different PUMP, INPUT SHAFT/INPUT DRUM, and TORQUE CONVERTER. Measure the bolt spacing on your old torque converter. Now compare that to the bolt holes on the flywheel on the 6.0 engine.. Different? Yea, I thought so. They WILL NOT bolt together. And NO!! You cannot just slap in a different torque converter and be done.. You will be swapping the parts I've listed above into the 60E in order for it to function behind that 6.0.