I am have been researching a Tremec T56/T6060 swap in the Jeep SRT8 on and off for the past few years.
There are no documented swaps on the internet. My "mechanic" has found a source that tells him it has been done a couple times in the WK1 and maybe a WK2. We are trying to get a hold of the guy(s) that was doing the swaps.
I don't own a GCSRT8 yet. I would prefer to go with a WK2 if we can do the swap on it. If not I will go with a WK1.
This is the info I have so far:
Transmission: RS Gear Magnum TZ Trans. Challenger parts for clutch, flywheel, etc. Options for 650 and 850ft/lbs and a few gear ratio options (starts at $3995 for T56 650ft/lb, $4395 for T6060 850ft/lb) Versions in 27 and 32 spline (t6060 is 32 spline only)
www.rsgear.com/products/transmissions/tremec-t56.aspx
The transmission includes RSGear adapter plate for TC mount.
Tranzilla 4 X 4 Adaptor Plate for Tremec T56 and Magnum 6-Speed Transmissions ID11152 - YouTube
NP242HD Transfer Case (has 2hi, 4hi, Fulltime High, N, 4lo) Several Dodge/Jeep models had this TC. Need to research input/output shafts to know if there is difference. Rated at 2000ft/lb torque, so good for around 680 crank tq with a 2.97 first gear ratio.
Could also use NP242AMG (Hummer H1 rated at 2300ft/lb, but would have to modify to have 2wd) I believe this is 32 spline
Remanufactured can be had for around $1000
For tuning apparently they used a Challenger SRT8 Manual Base tune in ECU. The WK2 has more electronics so it would be more challenging that WK1 I would think.
Lots of details needed for fabrication (trans and TC mounts) and additional parts like drive shafts, clutch pedal, sorting of electronics.
Working on a budget, So far at under $10k for parts including estimates for additional parts.
I think $20k might be achievable with labour, fabrication and Tuning...
I will update as I get more info.