Overview
The Crown Automotive 4637533 is a brass style synchronizer ring for AX15 manual transmissions, where it serves the 3rd, 4th and 5th gear positions. It applies to transmissions after serial 00705124 and fits Jeep Cherokee XJ, Comanche, Grand Cherokee ZJ, Grand Wagoneer SJ, Wrangler TJ and Wrangler YJ vehicles.
A synchronizer ring brings the gear up to shaft speed before it locks on, which keeps shifts smooth. This ring is the replacement for those gear positions in the listed Jeep models.
Key features
- Brass style construction
- 3 alignment notches
- 33 teeth
- Covers AX15 3rd, 4th and 5th gear positions
- It is a direct fit for the listed Jeep models.
Ring wear and shift feel
A brass synchronizer ring works by friction. It slows the gear to match shaft speed before the sleeve slides over the gear teeth, so the ring surface is the part that wears first. Brass rings wear gradually, so a change in shift feel is often the first clue.
Replacement usually involves the 3rd, 4th and 5th gear rings together, because the gears share a synchronizer hub and wear at similar rates. Check the sleeve teeth and hub for damage at the same time, and confirm the alignment notches before assembly. Driving habits matter too, since fast, hurried shifts load the rings harder.
- Notice grinding when shifting into 3rd or 5th
- Check that the new ring’s notches match the old one
- Replace worn sleeves along with the rings
Specifications
| Brand | Crown Automotive |
|---|---|
| Part number | 4637533 |
| UPC | 848399005219 |
| Application | AX15 3rd, 4th and 5th gear synchronizer ring |
| Style | Brass style |
| Alignment notches | 3 |
| Teeth | 33 |
| Serial application | After serial 00705124 |
| Fitment type | Direct Fit |
Vehicle fitment
It fits 1992–1999 Jeep Cherokee (XJ), 1992 Jeep Comanche, 1993–1994 Jeep Grand Cherokee (ZJ), 1993 Jeep Grand Wagoneer (SJ), 1997 Jeep Wrangler (TJ) Sport, and 1992–1995 Jeep Wrangler (YJ) models.
Years outside these listed ranges, including other Cherokee and Wrangler model years, are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
This ring sits inside the transmission, so replacing it requires disassembling the gearbox. Have a transmission shop familiar with AX15 units perform the work.
What’s included
The item is a brass style synchronizer ring. Crown Automotive names no additional hardware with it.
