Overview
The Crown Automotive J0639104 is a poppet ball for manual transmission shift rails on Jeep vehicles. It is cataloged under part number J0639104 and UPC 848399051964.
Crown Automotive positions itself as a manufacturer and distributor of replacement parts for Jeep vehicles, and this poppet ball belongs to its manual transmission line. No vehicle years, models or trims are named, so the application should be confirmed before installation.
Key features
- Replacement poppet ball for manual transmission shift rails
- Part number J0639104 with UPC 848399051964
- It is a direct-fit replacement for the manual transmission shift rail.
- Part of the Crown Automotive Jeep replacement parts range
Shift rail detent parts
A poppet ball sits in a spring-loaded bore and presses into detents on the shift rail, which holds each gear position. When the ball or its spring wears, the shift can feel soft or the gear may slip out of position under load. Replacing worn parts keeps the shift feel consistent.
Poppet balls are usually replaced together with the spring and the bore cover when a shift rail is opened, since those parts work as a set. Inspect the bore for scoring and check the ball for flat spots or pitting before installing a new one. Clean the bore thoroughly so debris does not sit under the new ball.
Before ordering, confirm fit for your vehicle’s year, model and trim, and confirm the transmission type on the shift rail. Work on the transmission with the vehicle supported and the battery disconnected, and keep track of any small springs during removal.
Specifications
| Brand | Crown Automotive |
|---|---|
| Part number | J0639104 |
| UPC | 848399051964 |
| Category | Manual Trans Shift Rail Poppet Ball |
Vehicle fitment
It fits Jeep manual transmission shift rails. Confirm fit for your vehicle’s year, model and trim before ordering.
Confirm your vehicle’s year, model and trim before ordering.
What’s included
Count the poppet balls on arrival against your transmission’s shift rail requirements.
