The Jeep Grand Cherokee WJ (model years 1999–2004) primarily used a four-speed automatic transmission, with the exact type depending on the engine. In North America, there was no factory manual option for the WJ.
In more detail, the WJ lineup offered different automatic transmissions based on engine and year. The following sections summarize the typical configurations and how to identify them on your vehicle.
Common transmissions offered on the WJ by engine
Before listing, note that the transmission choice varies by engine and production year. The guide below reflects the most common factory configurations seen in the WJ lineup.
- 4.0L inline-six (I6) and 3.7L V6 engines: 42RE four-speed automatic (electronic control)
- 4.7L V8 engine: 46RE four-speed automatic (electronic control); some early models used a variant in the 46 family (46RH)
Conclusion: If you’re identifying a WJ’s transmission, check the engine code and year, then verify with the VIN or service documentation to confirm the exact model and any regional variations.
Transmission identification codes
Useful designations you may encounter when confirming a WJ’s transmission:
- 42RE — 4-speed automatic commonly paired with 4.0L I6 and 3.7L V6
- 46RE — 4-speed automatic commonly paired with 4.7L V8
- 46RH — older or regional variant of the 46-series (less common in late 1999–2004 WJs)
Conclusion: Use the engine and year as the primary guide, and verify with the vehicle’s build data plate or VIN to confirm the exact transmission family installed.
Other notes and maintenance tips
While the WJ transmissions are generally durable, typical issues include leaks at pan gaskets, solenoid problems, and valve-body wear. Regular transmission fluid checks and following the manufacturer’s service intervals help extend life. When shopping for a WJ, obtain a vehicle history and consider a professional inspection focused on shift feel, fluid condition, and any trouble codes.
Conclusion: Knowing the correct transmission type for a given WJ model year aids maintenance, repair decisions, and value assessments. Always verify the exact transmission with the VIN or build sheet for precise compatibility.
Summary
The Jeep Grand Cherokee WJ typically uses a four-speed automatic transmission. The 4.0L I6 and 3.7L V6 generally use the 42RE, while the 4.7L V8 uses the 46RE (with some early variants referencing 46RH). There was no factory North American manual transmission option for the WJ. Confirm the exact transmission by checking the VIN, build plate, or service documentation, as there were year-to-year and regional variations.