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Not sure if any of these have been posted before or not. Just some transmission/transfer case information and supporting sites that I have found.

Hopefully all who are gear heads can add to this or correct what is incorrect and gear heads/non-gear heads can find some useful information.

Gear ratio calculator: Gear Ratio Calculator

Tire size calculator: DML Tire and Wheel Calculator

Transmissions:

Manual NSG370, The Jeep NSG370 Transmission - Novak Conversions

Auto (4 speed, 2007-2011) - 42RLE, Project-JK.com - Jeep JK Wrangler Resource » Jeep JK Wrangler 42RLE Automatic Transmission Service

Auto (5 speed, 2012-????) - W5A580

Transfer case:

X/Sport/Sahara: NV241, 2.72:1 low range

Rubicon: NVG241OR, 4:1 low range, The 241OR RockTrac Transfer Case | Novak Conversions

Axles:

X/Sport/Sahara front: Dana 30 with 3.21 or 3.73 gears (4.10 optional towing package in 07, 08 forward only 3.73 is optional).

X/Sport/Sahara rear: Dana 35 with 3.21 or 3.73 gears (4.10 optional towing package in 07, 08 forward only 3.73 is optional).

Rubicon: Dana 44 with 4.10 gears.

Project-JK.com - Jeep JK Wrangler Resource » Jeep JK Wrangler Axle Basics
 
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