
Yup, you guessed it.... the time has finally come to give Moby a little boost in power! We weren't planning on it but, with all the headaches we've been having with our transmission, we decided to stop throwing money at it, take the plunge and do a motor swap... but not a HEMI. After a lot of research, we decided to go with an GM LS 6.2L V8 (L94) and 6L80 automatic transmission using the MoTech LS kit with a heavy duty radiator. We hope to run this with a 3:1 Atlas 2-speed and brand new Dynatrac ProRock 80 rear axle to soak up all the additional power. This thread has been started to document the process of our Jeep JK Wrangler LS swap and we hope that you'll enjoy the build.

THE PLAN:
- LS 6.2L V8 (L94)
- 6L80 6-Speed Automatic Transmission
- MoTech LS Basic Kit
- Heavy Duty Radiator
- Advance Adapters 3:1 Atlas 2-speed Transfer Case
- Dynatrac ProRock 80 Rear Axle
- ATX Slab Bead Lock Wheels
- NITTO 40x13.50 K-Spec Trail Grapplers
LS SWAP UPDATES:
THE PROCESS:
- DAY 1 - TEARDOWN
- DAY 2 - OUT WITH THE OLD
- DAY 3 - GETTING THE LS READY
- DAY 4 - IN WITH THE NEW LS
- DAY 5 - ATLAS TIME
- DAY 6 - BODY TOUCHDOWN
- DAY 7 - WIRING AND INITIAL FIRE-UP
THE PARTS:
- LS 6.2L V8 (L94)
- 6L80 6-Speed Automatic Transmission
- MoTech LS Kit
- MoTech Cruise Control and Tap Shift
- Heavy Duty Radiator
- Advance Adapters 3:1 Atlas 2-speed Transfer Case
- Parts Sent to MoTech
- Parts Back from MoTech
- Exhaust Manifolds
- Wiring Harness from MoTech
- GM Cats
- GM Sensors
THE COST:
(so far - not including tax or shipping)

VIDEOS:
Let the SUPERSIZING Begin : Short Timelapse Video of Moby's LS Swap
Just for fun, here are the listed horsepower and torque numbers for a stock Jeep JK Wrangler 3.8L V6 and 3.6L V6 Pentastar motor compared to a 6.2L V8 motor:
Jeep JK Wrangler - 3.8L V6
205 hp @ 5,200 rpm
240 ft-lbs. @ 4,000 rpm
Jeep JK Wrangler - 3.6L V6
285 hp @ 6400 rpm
260 ft-lbs. @ 4800 rpm
GM Vortec L94 - 6.2L V8
403 hp @ 5700 rpm
417 lb-ft @ 4300 rpm
Time to Start Shopping
First on our list was to find a used LS engine/transmission from a 2007+ Silverado, Yukon or Escalade. From what we were told, it would also have to be from a truck/SUV that was a 4WD. After doing some searching, we finally found what we were looking for, a 2011 Yukon Denali 4WD 6.2L motor and transmission and if you can believe it, it only had 12,000 miles on it! Here are a few pics of it at the junkyard we found it at:
After checking it out, we agreed it was too good to pass up and so, we went ahead and bought it.
We've got more parts on order and will be posting them up as they come in. Be sure to check back for updates