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Jeep Wrangler Transmission Spotter’s Guide

Jeep Wrangler Transmission Spotter’s Guide

Evan

|

07-20-2021

|
Jeep Wrangler Transmission Spotter’s Guide

AX-15 – 5-Speed Manual

Jeep Wrangler: 1988.5 - 1999 with 4.0-liter Inline 6

 

Factoids:

Replaced weak Peugeot BA10 gearbox 

Related to Toyota Supra Turbo R154 manual

Best 5-speed ever installed in a Wrangler

 

Spotting Tips:

All-aluminum case & mid-plate, generous ribbing

Only mounts to a six-cylinder engine

10 spline input shaft

23 spline output shaft

Length: 16 1/2”

Spline Stick-out: 7 1/8”

 

Gear Ratios: 1st 3.83, 2nd 2.33, 3rd 1.44, 4th 1.00, 5th 0.79

 

 

AX-5 – 5-Speed Manual

Jeep Wrangler: 1984 - 2006 XJ, YJ, TJ with 2.5-liter Inline 4

 

Factoids:

Failure prone 5th gear, poor synchronizers, throwout bearing leaks (pre ’94)

AX-5 variants include Toyota G52, W58, and R151

 

Spotting Tips:

All-aluminum case, cast iron mid-plate

Looks like AX-15 so be wary

Only mounts to a four-cylinder engine

14 spline input shaft

21 spline output shaft

Length: 15 5/8”

Spline Stick-out: 7 1/2”

 

Gear Ratios: 1st 3.92, 2nd 2.33, 3rd 1.44, 4th 1.00, 5th 0.85

 

 

 

NV3550 – 5-Speed Manual

Jeep Wrangler: 2000 - 2004 Wrangler with 4.0-liter Inline 6

 

Factoids:

Replaced AX-15

Compatible with 23 spline version of NP231 transfer case

 

Spotting Tips:

 

All-aluminum case

10 spline input shaft

23 spline output shaft

Length: 16 3/4”

 

Gear Ratios: 1st 4.01, 2nd 2.32, 3rd 1.40, 4th 1.00, 5th 0.78

 

 

NSG370 – 6-Speed Manual

Jeep Wrangler: 2005-up Wrangler, 2004-up Wrangler Rubicon

 

Factoids:

Replaced NV3550

Compatible with 4.0-liter I6 and 3.8-liter V6

 

Spotting Tips:

All-aluminum case with extensive ribbing

10 spline input shaft

23 spline output shaft

Length: 23 1/2” w Inline 6 bellhousing

Length: 24 3/4” w/ 3.7-L V6 bellhousing

 

Gear Ratios: 1st 4.46, 2nd 2.61. 3rd 1.72, 4th 1.25, 5th 1.00, 6th 0.84

 

 

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