Prothane 7-311 GM Rear Control Arm Bushing Kit 1971-1977 Full Size Polyurethane

The Prothane 7-311 is a polyurethane rear control arm bushing kit designed as a direct upgrade over factory rubber bushings on 1971–1977 GM full-size vehicles. Worn or soft OEM rubber bushings allow the rear control arms to shift under load, causing unpredictable handling, alignment drift, and unwanted wheel hop. Prothane's polyurethane formulation eliminates that slop, restoring precise suspension geometry and consistent alignment settings.

Key Features:

• Polyurethane construction — significantly firmer than OEM rubber for improved compliance resistance and reduced deflection under load
• Maintains alignment settings — prevents caster and camber changes during hard acceleration, braking, and cornering
• Reduces wheel hop and shudder — keeps the rear control arms firmly located for predictable, controlled handling
• Long service life — polyurethane resists oil, ozone, and weathering far better than rubber
• Available in red or black — same durometer hardness in both color options
• Includes Prothane Super Grease — proper lubrication ensures quiet, squeak-free operation
• Lifetime warranty — Prothane guarantees against defects in materials and workmanship for the life of original ownership

Prothane's 7-311 bushing kit installs using standard hand tools and drop-in hardware. Be sure to apply the included Super Grease to all bushing surfaces during installation to prevent noise and ensure long-lasting performance. These bushings are a must-have upgrade for any 1971–1977 GM full-size build focused on performance handling and suspension longevity.