The 1998 Grand Cherokee primarily used a four-speed automatic transmission.
In that year, the Grand Cherokee (the ZJ generation) offered both a 4.0-liter inline-six and V8 options. Most configurations paired the 4.0L with a 42RE four-speed automatic, while V8 variants commonly used the stronger 46RE four-speed automatic. Manual transmissions were not standard for the model year, making the automatic the norm for typical buyers.
Transmission options by engine
These are the typical engine-to-transmission pairings you would find on a 1998 Grand Cherokee.
- 4.0-liter inline-six — 42RE four-speed automatic
- 5.2-liter V8 — 46RE four-speed automatic
- 5.9-liter Magnum V8 — 46RE four-speed automatic
These configurations reflect the common setups for most 1998 Grand Cherokees; exact specifications could vary by market or option package.
Why the transmission choice mattered for drivers
The four-speed automatic setup offered smooth shifting and adequate drivability for everyday use and light towing. The 42RE was well matched to the 4.0L engine, while the 46RE provided the extra torque capacity needed for the V8 options. This helped the truck-like SUV manage weight and off-road duties common to Grand Cherokee buyers of the era.
Maintenance and common issues
Routine maintenance and mindful service practices helped keep the 1998 Grand Cherokee’s automatic transmission reliable. Understanding the basics can prevent common issues and extend transmission life.
- Regularly check and replace transmission fluid using the manufacturer-recommended specification; avoid mixing fluids.
- Have the transmission pan and filter serviced as recommended, or during major fluid changes, to remove particulates and maintain proper flow.
- Be alert for symptoms such as delayed engagement, slipping, or harsh or surging shifts, which can indicate wear or fluid problems needing attention.
Sticking to scheduled maintenance and addressing symptoms early can reduce long-term repair costs and keep the SUV performing as designed.
Summary
The 1998 Jeep Grand Cherokee used a four-speed automatic transmission across its engine lineup, with the 4.0L inline-six commonly paired to the 42RE and the V8 options typically using the 46RE. Manual transmissions were not the norm for that model year, making the automatic the standard choice for most buyers. Maintenance and timely servicing were key to sustaining performance and longevity of the transmission in daily use and off-road scenarios.