Overview
The Crown Automotive J8132399 is a reverse idler gear for T176 and T177 manual transmissions. It sits in the reverse position and is a direct fit for the CJ-era Jeep vehicles named below.
It fits 1980–1983 and 1980–1986 Jeep CJ5 and CJ7 models and the 1981–1985 Jeep Scrambler, so owners of those CJ-era vehicles can use it.
Key features
- Reverse idler gear for T176 or T177 manual transmissions
- Reverse position
- Crown part number J8132399 and UPC 848399071023
- Direct fit for CJ5, CJ7 and Scrambler models
Before you install
A reverse idler gear sits in the gear train between the input and output shafts and is used only when reverse is selected. It reverses the direction of the output shaft so the vehicle moves backward, and it spends most of its life unloaded. Because it runs on a shaft with a bushing or bearing, wear usually shows up as noise or hard shifting into reverse rather than as a visible break.
When choosing a replacement, match the gear to the transmission code first, then confirm the tooth count and bore against the old gear. On older CJ-era transmissions, the reverse idler is often replaced together with the reverse shift fork, the idler shaft and any thrust washer, because a worn part can quickly wear its mating parts. Inspect those components while the transmission is open.
- Check gear teeth for chipping or flat spots
- Look for play on the idler shaft
- Replace thrust washers and snap rings with the gear
- Compare the new gear to the old one before assembly
Specifications
| Brand | Crown Automotive |
|---|---|
| Part number | J8132399 |
| UPC | 848399071023 |
| Part type | Reverse idler gear |
| Position | Reverse |
| Transmission application | T176 or T177 manual transmission |
Vehicle fitment
It fits the 1980–1983 Jeep CJ5 (Base, Golden Eagle, Laredo, Limited, Renegade), the 1980–1986 Jeep CJ7 (Base, Golden Hawk, Laredo, Limited, Renegade) and the 1981–1985 Jeep Scrambler (Base, Laredo, Renegade, SL, SR).
Check your vehicle’s year, model and trim against this coverage before ordering, especially for Wrangler, Cherokee or Gladiator owners.
Installation notes
Reverse idler gears are normally set up during a transmission rebuild, where gear mesh and shaft fit matter. Professional assembly is advisable for this gear.
What’s included
The item is a single reverse idler gear. Compare the package contents with your installation before starting.
