Skip to main content
Reference

1987-2002

1987-1989

1989-1999
Name: AX5
Speeds: 5
Case Length: 22.50"
Bolt Pattern:


Name: BA10-5
Speeds: 5
Case Length: 24.00"
Bolt Pattern:

Name: AX15
Speeds: 5
Case Length: 24.00"
Bolt Pattern:

Gear Ratios: Gear Ratios: Gear Ratios:
1st:  3.93
2nd:  2.33
3rd:  1.45
4th:  1.00
5th:
  0.85
 Rev:  4.74
1st:  3.39
2nd:  2.33
3rd:  1.44
4th:  1.00
5th:  0.79
Rev:  3.39
1st:  3.83
2nd:  2.33
3rd:  1.44
4th:  1.00
5th:  0.79
Rev:  4.22
Notes:  11/8 inch 10 spline input shaft.  21 spline output.  Cast Iron Intermediate plate.  AX4 (solid case no intermediate plate) was used up to 10/4/88. 
Notes:  Two piece clamshell case and five bolts to bellhousing. Used up to 3/03/89.
Generally had 21 spline output but 23 spline possible.
Notes:  11/8 inch 10 spline input shaft. Aluminum intermediate plate.  23 spline output. Replaced BA10/5 after 3/03/89. 

2000-2004

2005-2008
 
2001-2004
Name: NV3550
Speeds: 5
Case Length: 16.750"
Bolt Pattern:


Name: NSG370
Speeds: 6
Case Length:  16.750"
Bolt Pattern:

 Name: NV1550
Speeds: 5
Case Length: 16.750"
Gear Ratios:
Gear Ratios: Gear Ratios:
1st:  4.01
2nd: 
2.33
3rd: 
1.39
4th: 
1.00
5th: 
0.78
Rev: 
3.57
1st:  4.46
2nd:
  2.61
3rd: 
1.72
4th:
  1.25
5th: 
1.00
6th: 
0.84
Rev: 
4.06
1st:  3.85
2nd:  2.25
3rd:  1.48
4th:  1.00
5th:  0.80
Rev: 
4.06
 
 Notes:  11/8 inch 10 spline input shaft.  23 spline output.
 
 Notes:  11/8 inch 10 spline input shaft. Non removable bellhousing.  23 Spline output.
 
 Notes:  11/8 inch 10 spline input shaft.

Top Jeep Articles

  • September 15, 2026
  • 5 min read
Which Jeep Wrangler Axles Do I Have?
For anything from simply changing out the differential covers, to replacing the entire axle, it is always good to know exactly what you have under the vehicle. But not everyone knows, especially if you bought the vehicle used.
READ MORE
  • September 14, 2026
  • 4 min read
Jeep Named "Official 4WD of Moab" in New Two-Year City Partnership
Moab's city council approved a $250,000 sponsorship deal with Jeep, formalizing a 60-year relationship built on trail stewardship, loaned vehicles, and Easter Jeep Safari.
READ MORE
  • September 10, 2026
  • 5 min read
Breathing Easy: What Is a Jeep Snorkel and Do You Need One
Learn how a raised air intake helps protect your Jeep from water ingestion and trail dust—and why a snorkel alone does not increase its factory water-fording limit.
READ MORE
  • September 9, 2026
  • 7 min read
What Winch Size Do I Need for My Jeep?
From GVWR and trail conditions to drum layers and electrical demand, learn how to choose a winch with the right pulling capacity for your Jeep.
READ MORE
  • September 9, 2026
  • 4 min read
Quadratec Jeep Licensed Tailgate Bike Cover Review: Bike Protection for the Gladiator JT
We put this Jeep-licensed tailgate cover to the test on real trail runs to see how well it shields bikes from road grime, dust, and highway debris.
READ MORE
  • September 8, 2026
  • 5 min read
How to Choose the Right Tires for a Jeep Wrangler 4xe
The Wrangler 4xe’s added weight and instant torque demand more from its tires. Learn how load index, tire size, tread design and driving habits can help determine the right choice.
READ MORE
Black side steps on a red Jeep Wrangler
  • September 4, 2026
  • 4 min read
Side Steps Q&A
From daily convenience to off-road durability, we answer the most common Jeep side step questions to help you choose, install and maintain the right setup for your build.
READ MORE