The Jeep Cherokee XJ is one of the most iconic SUVs ever built, known for its rugged simplicity, off-road capability, and long production run from 1984 to 2001. One of the most common questions asked by owners, buyers, and Jeep enthusiasts is: what transmission is in a Jeep Cherokee XJ? The answer depends on the model year, engine type, and whether the vehicle has an automatic or manual transmission.
In this guide, we’ll break down all the transmissions used in the Jeep Cherokee XJ, explain which years used which units, and discuss reliability, common problems, and upgrade options.
What Transmission Is in a Jeep Cherokee XJ?
Overview of Jeep Cherokee XJ Transmissions
Throughout its production, the Jeep Cherokee XJ was offered with both manual and automatic transmissions. These transmissions were paired with several engines, including the legendary 4.0L inline-six, as well as smaller four-cylinder and V6 engines in earlier years.
Most XJ owners today are familiar with the AW4 automatic and AX15 manual, as these are the most common and most reliable options.
Automatic Transmissions Used in the Jeep Cherokee XJ
AW4 Automatic Transmission (1987–2001)
The Aisin-Warner AW4 is the most popular and respected transmission ever installed in the Jeep Cherokee XJ. It was primarily paired with the 4.0L inline-six engine.
Key features of the AW4:
- 4-speed automatic transmission
- Electronically controlled
- Extremely durable and reliable
- Used from 1987 through 2001
The AW4 is widely regarded as one of the strongest automatic transmissions Jeep ever used in a light SUV. With proper maintenance, it is common for AW4 transmissions to exceed 250,000 miles without major repairs.
Gear ratios (AW4):
- 1st: 2.80
- 2nd: 1.53
- 3rd: 1.00
- 4th (Overdrive): 0.75
This transmission is especially popular among off-road enthusiasts due to its smooth shifting and strength under load.
TorqueFlite 904 / 999 (1984–1986)
Earlier Jeep Cherokee XJ models used Chrysler TorqueFlite automatic transmissions, often referred to as the TF904 or TF999.
These transmissions were commonly paired with:
- 2.5L four-cylinder engines
- 2.8L V6 engines
While reasonably reliable, these older automatics are not as strong or refined as the AW4 and are less common today.
Manual Transmissions Used in the Jeep Cherokee XJ
AX15 Manual Transmission (1989–1999)
The AX15 is the most well-known manual transmission used in the Jeep Cherokee XJ. It was commonly paired with the 4.0L inline-six engine and is highly respected for its durability.
AX15 highlights:
- 5-speed manual transmission
- Strong internal components
- Popular for off-road and trail builds
The AX15 is often preferred by drivers who want maximum control and simplicity. When maintained properly with the correct gear oil, it can last well over 200,000 miles.
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BA10/5 Manual Transmission (1987–1989)
The Peugeot BA10/5 was used briefly in some late-1980s Cherokee XJ models.
Important notes about the BA10/5:
- 5-speed manual
- Known for weaker case design
- Less durable than AX15
Many Jeep owners actively swap out the BA10/5 in favor of the AX15 due to its better reliability and aftermarket support.
AX5 Manual Transmission (4-Cylinder Models)
The AX5 manual transmission was used in Cherokee XJs equipped with the 2.5L four-cylinder engine.
While adequate for daily driving, the AX5 is not as strong as the AX15 and is not recommended for high-power builds or aggressive off-road use.
Which Transmission Is Best in the Jeep Cherokee XJ?
How you want to use your Jeep will determine the answer:
- Best automatic: AW4
- Best manual: AX15
- Best for off-road: AW4 or AX15
- Best for reliability: AW4
The AW4 stands out for its toughness and ease of use, especially for drivers who do both on-road and off-road driving. Meanwhile, the AX15 remains a favorite for purists who prefer a manual transmission.
Common Transmission Problems in the Jeep Cherokee XJ
Even though the XJ is known for reliability, transmissions can still develop issues over time.
Common problems include:
- Fluid leaks from seals and cooler lines
- Delayed or harsh shifting (AW4)
- Worn clutch components (manual transmissions)
- Incorrect fluid usage
Regular maintenance, such as fluid changes and inspections, plays a major role in extending transmission life.
Final Thoughts
So, what transmission is in a Jeep Cherokee XJ? The most common and trusted answer is the AW4 automatic transmission, especially in models equipped with the 4.0L inline-six engine from 1987 to 2001. Manual options like the AX15 also offer excellent durability and control.
Whether you’re restoring a classic XJ, shopping for a used one, or planning an off-road build, understanding the transmission options will help you make smarter decisions and keep your Jeep running strong for years to come.