Brand New | Heavy-Duty Upgraded | Zero Miles | $2,376
For a cheaper cost we also have rebuilt units and can rebuild your unit with premium components.
Get factory-fresh reliability for your Jeep, truck, or custom 4WD project. This brand new, zero-mile Aisin AX15 is manufactured to modern specifications, featuring upgraded metallurgy and casing materials over vintage factory units. It delivers crisp shifting, quiet operation, and an increased torque capacity rating of 385 lb-ft.
Whether you are replacing a worn out gear box, upgrading from a fragile AX5, or performing a classic 4WD engine swap, this crate transmission offers the ultimate bolt-in peace of mind for wheelers and drivers that you want to escape headaches with. Especially when paired with a remanufactured D-300 from us or an Atlas at a discounted price.
- Condition: 100% brand new, original equipment manufacturer Aisin.
- Torque Rating: Upgraded to 385 lb-ft (handles mild V8 and high-output inline-6 swaps).
- Case Construction: Lightweight, high-strength cast aluminum. About 95lbs.
- Configuration: Direct-fit replacement for standard 23-spline output applications.
- Shift Pattern: Standard H-pattern 5-speed.
Gear Ratio
The AX15 features an aggressive first-gear ratio optimized for low-end torque and off-road crawling, paired with a highway-friendly overdrive fifth gear.
| Gear | Ratio | Description |
|---|---|---|
| 1st | 3.83:1 | Deep low-end for starting on inclines or crawling terrain |
| 2nd | 2.33:1 | Smooth mid-range progression |
| 3rd | 1.44:1 | Optimal power band tracking |
| 4th | 1.00:1 | Direct drive (1:1 input/output efficiency) |
| 5th | 0.79:1 | Overdrive for reduced highway RPM and improved fuel economy |
| Rev | 4.22:1 | High-torque reverse ratio for precise backing control |