...i found that the 6.6L LB7 puts out 520 ft-lbs and the ZF S6-650 is rated to handle a max of 520 ft-lbs. to me this sounds like i need to find a different six speed transmission that is made for more torque. However, the manufacturer used the 6.6l Duramax with ZF S6-650 configuration from 2001 to 2006 i guess there just must be something i am not understanding here.
thanks
Jonathan
If I remember right the trucks with manuals didn't have the HP and torque of the ones with the Allison, probably detuned by the computer to make the transmission survive, that's my guess.
I don't know if you have any other manual transmission options behind the Duramax, what else bolts up?
I'd also look in the medium duty trucks, I bet some of those had 3000 series Allison's which should have an SAE bellhousing, and if that is the case then with a flywheel that may not exist you could use a number of different medium duty 5 and 6 speed manual transmissions that should hold the full power and then some.
Grigg
