Overview
The Baer Brakes 4302339S is a silver rear disc brake kit for 60-87 Chevy and GMC C10 2WD trucks with C-clip axles and a 5 lug, 5×5.00 inch wheel pattern. The S4 Plus system uses a four-piston S4 caliper on a 13 inch rotor.
A one-piece park brake shoe assembly sits inside the backing plate, which also works as the caliper mount. Rotors are supplied pre-assembled with stainless hardware. Baer says wheel fit cannot be guaranteed for every wheel style, so use template S135H to check the wheel of choice first.
Key features
- Silver four-piston S4 floating caliper with powder coated finish
- Hard anodized aluminum pistons with stainless steel abutments
- Dual seals for protection against dust, weather and pressure
- Noise suppression clips included
- Two-piece slotted, drilled, zinc-plated rotor with billet aluminum hat
- Park brake shoe assembly within the backing plate
- DOT approved braided brake hoses
Park brake and worn parts
Rear drum-style park brake hardware on older trucks is often rusted or out of adjustment. When a rear disc kit is installed, the shoes, springs and cable ends should be inspected, because a poorly adjusted park brake can make the truck hard to hold on an incline. Clean, free-moving hardware makes the system easier to adjust correctly.
Signs that the old rear components are worn include pulsing under braking, a pedal that sinks slowly, or a grinding noise that appears after a few stops. Address these before the rear kit is installed, since they can suggest problems with the axle seal or wheel bearing as well.
- Check the park brake cable ends for rust or binding
- Inspect the wheel bearing for play before mounting
- Look for fluid seepage around the axle seal
- Test the parking brake on a slope after installation
Specifications
| Brand | Baer Brakes |
|---|---|
| Part number | 4302339S |
| UPC | 844165043799 |
| Wheel bolt pattern | 5×5.00 inch |
| Lug count | 5 lug |
| Axle flange | C-clip axles |
| Caliper | S4, four-piston, floating, silver |
| Rotor outside diameter | 13.0 inch |
| Rotor thickness | 0.81 |
| Rotor type | 2-piece, vented, slotted, drilled, zinc plated |
| Rotor hat material | Aluminum |
| Brake pad FMSI number | DR1-C |
| Template | S135H |
| Minimum wheel diameter | 17.0 inch |
| Brake hose DOT approved | Yes |
| Park brake | Included |
| Applications | GM C10 trucks 60-87 |
| Country of origin | US |
Vehicle fitment
This kit’s manufacturer fitment entries include 1960-1986 Chevrolet C10, 1987 Chevrolet R10, 1966 GMC 1000, 1960-1965 GMC 1000 Series and 1967-1974 GMC C15/C1500, along with Suburban variants: 1967-1986 Chevrolet C10 Suburban, 1987-1988 Chevrolet R10 Suburban, 1975-1978 GMC C15 Suburban, 1979-1986 GMC C1500 Suburban, 1987-1988 GMC R1500 Suburban, 1967-1974 GMC C15/C1500 Suburban and 1960-1966 GMC Suburban.
For 1975 to 1986 GMC C15 and C1500 models, this kit covers the Suburban versions only. It does not cover 1989 and later trucks. Confirm fit for your vehicle’s year, model and trim before ordering.
Installation notes
Measure wheel clearance using template S135H before mounting; the 13 inch rotor is sized for wheels 17.0 inch in diameter or larger. Test pedal firmness after bleeding the system, because brake failure is a serious safety risk.
What’s included
Included are the silver S4 four-piston caliper, 13 inch rotors pre-assembled with stainless hardware, the backing plate with park brake shoe assembly, and DOT approved braided hoses with hardware.
Not included: Lug nuts, park brake cables and a front rotor are not part of the kit and need separate parts.
