Overview
The Crown Automotive J8126744 is a driver-side rear wheel cylinder for 10 inch brakes on the 1966–1971 CJ5 and CJ6, and the 1966–1968 CJ5A and CJ6A.
It is one of a left and right pair of cylinders.
Key features
- Rear driver-side wheel cylinder
- For 10 inch brakes
- Direct-fit CJ application
Rear wheel cylinder service
Rear wheel cylinders push the shoes against the drum when the brakes are applied, and they work with the parking brake linkage on many drum setups. Fluid that seeps past the piston seal or the boot will wet the shoes and drum, and that contamination can reduce braking force. Replace the cylinder when fluid appears, or when the pistons stick and the shoes drag.
Because the left and right cylinders are separate parts, match the position carefully and avoid swapping sides. Pull the drum to check for leaks and inspect the shoes before fitting new cylinders, and bleed the system after the hose connection is made. Test the brakes at low speed before driving normally.
- Confirm the side before ordering
- Check shoes and drums for fluid contamination
- Bleed the system after installation
Specifications
| Brand | Crown Automotive |
|---|---|
| Part number | J8126744 |
| UPC | 848399068634 |
| Product type | Drum brake wheel cylinder |
| Position | Rear, driver side |
| Brake size | 10 inch |
| Fit type | Direct fit |
Vehicle fitment
It fits the 1966–1971 Jeep CJ5 and CJ6 and the 1966–1968 CJ5A and CJ6A.
CJ5 and CJ6 models before 1966 and the CJ7 are not on the list. Confirm your vehicle’s year, model and trim before ordering.









