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I. Atlas T/C - JL Wrangler

Jeep JL & JT to Atlas 2 speed: The Jeep JL with the 850RE 8-speed automatic with the 3.6L V6 or the turbo 4 cylinder  and the D478 manual 6 speed with the turbo 4 cylinder, coupled to a Magna transfer case. This is the first year Jeep went away from its standard circular bolt pattern when coupling these two gear boxes. To couple these transmission to the Atlas, they will require a new adapter. P/N 50-9900 is for the Automatic and P/N 50-9901 if for the manual or P/N 50-9903 for the Jeep 392's & 4xE. 50-9904 Jeep JL DIESEL 8-Speed Automatic. The adapter is 7.75" which provides the needed length to clear the transmission cooling system. Also see Atlas adapters 

We offer a new yoke to retain the stock GKN driveshafts P/N AFJL. The adapter puts the Atlas in a similar location as factory, allowing you to retain the factory driveshafts. These yokes can be swapped out for any Spicer yoke down the road, but it now allows the Jeep equipped Atlas to be back on the road within a day. The complete install of the transfer case is approximately 6 to 8 hours and the shifter 1 to 2 hours. 

Cable shifter instructions: The shifter bracket and cables need to be installed to the front of the Atlas before the unit is installed into the vehicle. The stock transfer case, shifter and cable will also need to be removed. The removal of the console is the starting point.

The installation of the Atlas can be reveiwed on the 303030 instruction sheet.

JL and JT 2018 & newer Jeeps equipped with an automatic transmission will also require a Transmission Control Module flash to operate correctly with the new Atlas transfer case.  Jeep coded the stock transfer case ratio of either the 2.72:1 or the 4.0:1 into this module and any different ratio in the transfer case will put the vehicle into a limp mode.  A Jeep programmer like a Z Automotive or the Vgate OBD2 code reader with the Canbus phone app from jscan, work great.  The exact ratios for the Atlas are required for re-programming the module.  

The electronics of the JL stock transfer case need to be connected to the Atlas. The nice thing is we have you covered with kit 300377A. The kit 300377A with a programer for the transmission control module will allows the JL to retain all the stock functions that it came with stock when installing an Atlas.

The Atlas can be ordered as a complete unit with the GKN yokes or a unit that you pick the yokes and gear ratio

JL's 2SP Atlas to 2018 & Newer:

(These kits do include the Adapter kit & T/C shifter, you need to pick yokes and gear ratio)
ATLAS-PS-JL - Short tail Atlas 2SP (G2/G3 Gears) Automatic transmission.
ATLAS-PS-JL-M - Short tail Atlas 2SP (G2/G3 Gears) Manual Transmission.

ATLAS -PS-JL-392 - Short tail Atlas 2SP (G2/G3 Gears) 392 & 4xE Auto Transmission.

ATLAS -PS-JL-DIESEL - Short tail Atlas 2SP (G2/G3 Gears) Jeep Diesel with Auto Transmission.

 

Complete Jeep JL's pre-configued units. These units are offered with a short tailhousing. The yokes are the GKN flange yokes that retain the factory drive shafts. These kits are complete units ready to install.
JL's 2SP Atlas Short tail to 2018 & Newer Auto Trans with the 3.6L V6:
ATLAS-PS-JL30 3.0:1(G2 Gears)
ATLAS-PS-JL38 3.8:1(G2 Gears)
ATLAS-PS-JL43 4.3:1(G2 Gears)