Overview
The Crown Automotive 4636371 is an AX15 cluster gear, the countershaft gear inside the AX15 transmission. It fits the 1988–1995 Wrangler YJ, 1989–1999 Cherokee XJ, 1993 Grand Cherokee ZJ and 1997 Wrangler TJ Sport.
Because the cluster gear sits inside the transmission, replacing it means opening the gearbox, which is typically left to a transmission shop.
Key features
- AX15 cluster gear
- Fits YJ, XJ, ZJ and TJ models
- Part number 4636371 with UPC 848399005080
- Fitment list includes several Cherokee XJ trims
Cluster gear wear and replacement
The cluster gear carries drive from the input shaft to the countershaft, so its teeth take steady load every time the gearbox moves through a shift. Over time the teeth can chip or flatten, and the gear can wear where it meets its bearings. Common signs of a worn cluster gear include a grinding or whining noise that rises with road speed, hard shifts into particular gears, and gears that jump out under throttle.
Because the AX15 cluster gear sits inside the case, the diagnosis usually happens during a teardown. Inspect the gear teeth for pitting or uneven wear, check the shaft and bearing surfaces for scoring, and look at the thrust washers for flaking. Many shops replace worn bearings and washers at the same time, since opening the gearbox is the costly part of the job and those parts are inexpensive by comparison.
Before buying, match the gear to your transmission code and vehicle year, and confirm the mating gears are in good condition, since a new cluster gear running against a worn partner wears quickly.
Specifications
| Brand | Crown Automotive |
|---|---|
| Part number | 4636371 |
| UPC | 848399005080 |
| Transmission | AX15 |
| Component | Cluster gear |
| Fit type | Direct fit |
Vehicle fitment
It fits 1988–1995 Jeep Wrangler (YJ) in Base, Islander, Laredo, Renegade, Rio Grande, S, SE and Sahara trims; 1989–1999 Jeep Cherokee (XJ) in several trims; 1993 Jeep Grand Cherokee (ZJ) in Base and Laredo; and 1997 Jeep Wrangler (TJ) Sport.
Wrangler TJ years other than 1997 and Grand Cherokee years other than 1993 are not in the list. Confirm your vehicle’s year, model and trim before ordering.
What’s included
The item supplied is the AX15 cluster gear, part number 4636371. Check the package contents against your installation before starting.