The 1998 Jeep Grand Cherokee 5.9 L Magnum V8 is paired with a 46RE four-speed automatic transmission that is electronically controlled. This setup was standard for that year’s high-torque configuration and is part of Chrysler’s TorqueFlite lineage.
Transmission type and specs
The 46RE is a four-speed automatic transmission used by Chrysler for heavy-duty applications such as the 5.9 Magnum V8 in the 1998 Grand Cherokee. It is electronically controlled and designed to handle the power and torque of the V8 engine.
Here are the defining characteristics of the 46RE as it appeared in this Jeep:
- 4 forward speeds with an overdrive gear
- Electronic control for shift timing and line pressure
- Torque converter lock-up feature to improve fuel economy and efficiency
- Designed to handle the 5.9 Magnum’s torque output and heavy-duty duty-cycle
- Typically paired with the Grand Cherokee’s 4x4 transfer case configuration
These traits illustrate how the 46RE operates within the Grand Cherokee’s drivetrain and what owners should expect in terms of shifting, durability, and maintenance.
Notes on the transmission designation
46RE indicates a four-speed automatic transmission with electronic controls used by Chrysler in mid-to-late 1990s vehicles. It built upon earlier hydraulic designs (the RH/R) and was employed in several Jeep/Dodge applications requiring higher torque handling.
Maintenance and care
To keep the 46RE in good shape in a 1998 Grand Cherokee 5.9, follow standard automatic-transmission maintenance and monitor for signs of wear. Proper care can improve longevity and performance.
- Regular checks of transmission fluid level and condition
- Fluid changes and a corresponding filter/seal service at manufacturer-recommended intervals
- Ensure adequate cooling with a working transmission cooler and unobstructed radiator flow
- Use the correct specification of ATF and avoid late-model additives that can contaminate the system
- Monitor for shifting irregularities, slipping, or failure to engage; address solenoid or valve-body issues promptly
Routine maintenance helps prevent common 46RE issues and extends the life of the transmission and drivetrain.
Summary
The 1998 Jeep Grand Cherokee 5.9 uses a four-speed, electronically controlled automatic transmission known as the 46RE. It was designed to handle the 5.9 Magnum’s torque, and with proper maintenance it can provide reliable performance for daily driving and light-to-moderate off-road use. Always refer to the owner’s manual or a qualified technician for service specifications and fluids for your specific vehicle.