Two problems related to engine noise have been reported for the 1998 Jeep Grand Cherokee. The most recently reported issues are listed below.
Was driving on the highway. At about 65mph, the engine started revving from 3500 rpm all the way to 6000 rpm, but the speed didn't increase at all. Took the car to the shop and the mechanic said they ran a full diagnostics check and found nothing wrong with the cherokee. So I drove the Jeep for another month until it died on one early morning. I went to start the Jeep just like every morning, but this time the engine won't even turn or make a sound. The gauges indicators went beserks and bottomed out at the max. It looks like an electrical problem. I have yet to find out what exactly is wrong with the Jeep when I take it in to the dealer today.
Rear axle bearing failed; front axle is now producing same vibration and noise similar to rear component; dip stick installation wrong; and engine hesitation and sluggish acceleration when cold.