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Description
About the Jeep AX15 Transmission
This robust gearbox was popular in Jeep Wranglers and Cherokees from 1988 to 1999, known for its durability and smooth shifting. Whether replacing a worn-out transmission or upgrading from the less capable AX5 (4-cylinder 5-speed) or older 4-speed transmissions, this AX15 transmission for sale at our store offers improved gear ratios and a stout Aisin Warner design that can handle the demands of both on-road driving and off-road adventures. This Jeep AX15 transmission for sale at our site is thoroughly inspected and ready to breathe new life into your Jeep project.
About the AX15 Transmission
The Jeep AX15 transmission is a highly regarded manual gearbox used in Jeep vehicles from 1988 to 1999. Known for its durability and smooth shifting, the AX15 is a five-speed transmission featuring synchronized reverse gear (a notable feature for the era) and overdrive fifth gear (0.79:1), making it ideal for both on-road and off-road driving. Its robust Aisin Warner design and compatibility with various Jeep models, including the Wrangler YJ and TJ, Cherokee XJ, and Comanche MJ, make it a popular choice among Jeep enthusiasts. Because the AX15 is essentially the same fundamental transmission as the Toyota R150 (with a Jeep-specific bellhousing), it benefits from proven Aisin engineering and durability.
Why Choose the AX15 Transmission?
The Aisin-Warner AX15 is a medium-duty, 5-speed manual transmission that has earned a reputation for reliability and durability. Originally featured exclusively in Jeep models from 1988 to 1999, this AX15 transmission for sale today is a popular choice for Jeep owners looking to upgrade or replace their existing transmission. The AX15 fits factory bolt-in into Wrangler YJ, Wrangler TJ (through 1999), Cherokee XJ, and Comanche MJ, making it a far easier swap than alternatives that require custom adapters.
Key Features of the AX15 Transmission
- Overdrive 5th Gear (0.79:1): Enhances fuel efficiency and reduces engine wear during highway driving by lowering engine RPM at cruising speeds.
- Synchronized Reverse Gear: Facilitates smoother and easier engagement, reducing gear grinding that’s common with non-synchronized reverse designs.
- Aluminum Case: Lightweight (just 97 lbs total transmission weight) yet sturdy, aiding in heat dissipation and overall transmission durability.
- Interchangeability: Compatible with a range of Jeep transfer cases (NP207, NP231 Command-Trac, NP242 Selec-Trac, NP249 Quadra-Trac) and Jeep engines (4.0L I6, 4.2L I6, 2.5L I4), offering flexibility in vehicle modifications.
- Rebuildable Design: Easy to service and rebuild, extending the transmission’s lifespan. Rebuild kits readily available from Aisin, Mopar, and aftermarket suppliers (Cottman, Allstate Gear, etc.).
- Wide Gear Ratio Spread: Provides a good balance between low-end torque (3.83:1 first) and high-speed cruising capabilities (0.79:1 overdrive). The 4.84:1 ratio spread (between 1st and 5th) gives the AX15 wide flexibility.
- Toyota R150 Heritage: The AX15 shares its fundamental architecture with the Toyota R150 manual transmission, benefiting from Aisin’s proven design used in millions of Toyota pickup, 4Runner, and Tacoma applications.
Compatibility: Jeep Applications
The AX15 transmission is compatible with the following Jeep models and engines:
Vehicles:
- Jeep Cherokee (XJ) 1988 to 1999 with 4.0L I6 or 2.5L I4
- Jeep Comanche (MJ) 1988 to 1992 (Cherokee-based pickup truck)
- Jeep Wrangler (YJ) 1989 to 1995 with 4.2L I6 or 2.5L I4
- Jeep Wrangler (TJ) 1997 to 1999 with 4.0L I6 (replaced by NV3550 in 2000)
Engines:
- Jeep 4.0L Inline-6 (AMC / Jeep “PowerTech” 242 cu in, 190 to 220 HP, the legendary Jeep I6)
- Jeep 2.5L Inline-4 (AMC / Jeep 150 cu in, 121 to 130 HP)
- Jeep 4.2L Inline-6 (AMC 258 cu in, predecessor to the 4.0L)
Note on TJ Wrangler 2000+ models: The AX15 was replaced by the NV3550 in TJ Wranglers starting in model year 2000. If you have a TJ from 2000 to 2006, you need an NV3550, not an AX15. Earlier 1997-1999 TJ Wranglers use the AX15.
Quality Assurance
When you purchase an AX15 transmission for sale from us, you can expect:
- Thorough inspection and testing of all used transmissions
- Donor Jeep identification (Wrangler YJ, Wrangler TJ, Cherokee XJ, or Comanche MJ)
- Engine pairing documentation (4.0L I6, 2.5L I4, or 4.2L I6)
- All 5 forward gears and synchronized reverse tested
- 5th gear overdrive engagement verified
- Aluminum case crack inspection
- Bellhousing pattern confirmation for Jeep applications
- Competitive pricing
Why Choose Our Used AX15 Transmissions?
- Cost-effective alternative to new / reman ($1,499 vs $1,800 to $2,800 reman)
- Proven reliability with millions of Aisin AX15 / R150 applications worldwide
- Wide compatibility with all Jeep XJ / YJ / TJ / MJ applications
- Synchronized reverse for smoother shifting
- Lightweight 97 lb case for easier installation than HD truck transmissions
Don’t miss this opportunity to upgrade your Jeep with a reliable AX15 transmission. Browse our selection to find this Jeep AX15 transmission for sale today and give your vehicle the performance it deserves. Here at Vaz Auto Solutions, you will find the AX15 Transmission for sale at the perfect price. We work to make your hunt for the perfect part for your automobile more seamless and efficient.
AX15 vs Other Jeep 5-Speed Manuals
| Transmission | Application | Torque Rating | Weight | Notes |
|---|---|---|---|---|
| AX15 (this listing) | XJ / YJ / TJ / MJ 1988-1999 | 280 lb-ft | 97 lbs | Aisin Warner, syncro reverse, the gold standard |
| AX5 | XJ / YJ 4-cyl applications | 170 lb-ft | ~85 lbs | 4-cylinder only, weaker than AX15 |
| NV3550 | TJ Wrangler 2000-2004 | 300 lb-ft | ~110 lbs | Replaced AX15 in TJ |
| NV1500 | Dodge Dakota | 230 lb-ft | 75-80 lbs | Different chassis, NOT for Jeep |
| NSG-370 | JK Wrangler 2007-2018 | 350 lb-ft | ~140 lbs | 6-speed, replaces NV3550 |
Choose AX15 for: XJ Cherokee restoration, YJ Wrangler rebuild, TJ Wrangler 1997-1999, MJ Comanche projects, off-road builds with 4.0L I6.
Vehicle Compatibility
| Vehicle | Compatibility |
|---|---|
| Jeep Cherokee XJ (1988-1999) | 4.0L I6 or 2.5L I4 |
| Jeep Comanche MJ (1988-1992) | Cherokee-based pickup truck |
| Jeep Wrangler YJ (1989-1995) | 4.2L I6 or 2.5L I4 |
| Jeep Wrangler TJ (1997-1999) | 4.0L I6 (NOT 2000-2006 TJ which uses NV3550) |
| Engine Compatibility | Jeep 4.0L I6 (primary), 2.5L I4, 4.2L I6 |
Condition and Inspection
- Donor Jeep identified (Wrangler YJ, Wrangler TJ, Cherokee XJ, or Comanche MJ)
- Engine pairing documented (4.0L I6, 2.5L I4, or 4.2L I6)
- All 5 forward gears tested (1st through 5th overdrive)
- Synchronized reverse engagement verified (key AX15 feature)
- Overdrive 5th gear (0.79:1) engagement confirmed
- Synchro condition assessed (brass synchros)
- Input shaft 10-spline, 1.125 inch diameter verified
- Output shaft 23-spline, 1.375 inch diameter verified
- Bellhousing pattern confirmed (Jeep AMC / Chrysler specific)
- Aluminum case inspected for cracks or impact damage
- Top cover gasket condition inspected
- Clutch slave cylinder hydraulic port verified
- Fluid condition checked
- Donor Jeep and engine pairing documented
- All 5 forward gears tested
- Synchronized reverse verified (distinguishing AX15 feature)
- Overdrive 5th gear engagement confirmed
- Synchro condition assessed
- Aluminum case inspected
- Free freight pallet delivery to all 50 states
- 15 day replacement warranty on internal defects
- Jeep XJ / YJ / TJ experienced support team
Tom Baker (verified owner) –
Solid AX15 from Vaz Auto Solutions. Good price, arrived in decent time. Installed in my Jeep without issues. Shifts well, but packaging could’ve been better. Overall, happy with the purchase.
Dave Wilson (verified owner) –
Perfect fit for my Jeep! Vaz Auto Solutions delivered a great AX15 at an unbeatable price. Quick shipping, excellent customer service. Transmission works like new. Highly recommend