Originally Posted by Lankness
From what I've read/seen, the transfer case/axles are ok with that level. The upgraded 8 speed would handle the power as well. I'm not sure of any showstoppers on the current SRT...would be interested in other thoughts there though.
If you go look at Mopar transmission sites for after market nag-1 transmissions, there is typically a 75 lb-ft disparity between recommended Jeep SRT rating and LC/LX rating (ie: 700 lb-ft LC/LX and same trans is only rated 625 lb-ft for The Jeep).
Therefore the new 8-speed wouldn't handle the full motor based on this logic. 650 lb-ft is 881 nm, and the 8hp90 is rated for 900 nm of torque.
I personally wouldn't want that motor in a heavier Jeep with 625 hp / 575 lb-ft... Not that it wouldn't be nice or fast, but this would not do the bigger vehicle justice. BTW with 18% loss this is roughly 507 at the wheels, and every supercharger company for the wk2 has beaten that figure. Hmmm pay 90k, and lose money on your current WK2, I think most wouldn't...