The 42RLE was used in a limited set of Jeep models during the late 1990s and early 2000s, most notably some Grand Cherokee and Liberty configurations. Availability varied by year, engine, and market.
Background on the 42RLE
The 42RLE is an electronically controlled four-speed automatic transmission that belongs to Chrysler’s 42-series family. It served as an updated variant of early 42RE designs and was installed in several 4x4 Jeep models as Chrysler/Jeep updated its lineup around the turn of the millennium. As with many transmission names, exact fitment depended on the engine and production year, so not every trim within a model year used the 42RLE.
Jeeps that used the 42RLE
The following Jeep models are commonly cited as having variants of the 42RLE in certain years or configurations. Always verify with the vehicle’s VIN or service documentation, as not all trims within a model year necessarily used the 42RLE.
- Jeep Grand Cherokee (WJ; model years roughly 1999–2004)
- Jeep Grand Cherokee (WK; model years roughly 2005–2010)
- Jeep Liberty (KJ; model years roughly 2002–2007)
These examples illustrate the typical range where the 42RLE appears in Jeep literature and owner reports. Variations by engine and market mean that some vehicles within these ranges used other transmissions instead of the 42RLE.
How to verify if your Jeep has the 42RLE
To confirm the transmission in a specific vehicle, use the steps below. This helps ensure you’re identifying the correct model year and configuration for your exact Jeep.
- Check the transmission identification code on the transmission case or nameplate. The 42RLE will be listed on the tag or case markings in many cases.
- Look up the vehicle’s VIN with the manufacturer or a trusted VIN decoder to see the factory transmission specification for that build.
- Refer to the original window sticker or service manual for the exact transmission option listed for your trim and engine.
- Inspect the transmission itself for markings or model numbers that correspond to the 42RLE family (this may require a technician if the transmission is installed or replaced).
Confirming via VIN or official documentation is the most reliable approach, since production periods and options varied by year and market.
Notes on compatibility and caveats
Because the 42RLE is part of a broader family of Chrysler automatic transmissions, some Jeep models within the same generation may use different names (for example, 42RE or other variants) depending on engine, options, or regional specifications. If you’re restoring a Jeep or replacing a transmission, verify the exact compatibility before purchasing or installing parts.
Summary
The 42RLE appeared in a select group of Jeeps during the late 1990s and early 2000s, most notably certain Grand Cherokee and Liberty models. When in doubt, confirm via VIN, service manuals, or a transmission tag to ensure you’re working with the correct 42RLE configuration for your vehicle. If you’d like, share your exact model year and engine, and I can help narrow down the spec to your chassis.