|Originally posted by fierofinatic84se:|
I read the thread on the ls4 with the pcs controller for the transmission and how the biggest issue wasn't torque per say but the torque management, and the transmission was still holding up, and if torque management was the biggest issue, the 6t70 and 75, I've also been doing some more research and I've found that the xts actually uses the 6t70 for the fwd version and the 6t80 is actually the awd version, from what I have found, which is why I'm not able to find much on it but if the 6t70 is holding up to that twin turbo, it should be able to hold up to the v8 with proper torque management
From what I can see, the engine/trans pairings are as such:
LTG - 6t70
LFX - 6t75
LF3 - 6t80
The LFX is available in AWD or FWD. The LF3 is only avaialble with AWD. The LTG is not available in the US. The comparison page on the Cadillac web site also doesn't list the 3.16 axle ratio as available for the Premium model, which has AWD as an option, but only the 2.77 ratio, so I think
the only difference in the transmissions between AWD and FWD, is that the AWD transmissions have the extra output housing added, to support a driveshaft for the rear wheels.
I expect even the 6t80 won't hold up to full abuse from the LF3 engine, with torque management fully disabled. The factory programming for the torque management tends to be conservative though, to protect the transmissions. A built trans with the torque management pulled back a bit, or all the way out, should be able to handle the power though.