# QA1 73-77 GM A-Body Lower Boxed Trailing Arms All upper tubular and lower boxed trailing arms use polyurethane bushings on both ends, while upper adjustable and lower tubular trailing arms use a spherical ball or rod end assembly on the chassis end to eliminate bushing bind, allowing the suspension to move smoother for better control. This keeps the tires planted firmly on the ground for improved traction and a more predictable, better handling car. For a long-lasting finish, tubular and boxed trailing arms are powder-coated gloss black, while the adjustable arms are zinc plated and anodized. Boxed Trailing Arms are constructed from 0.120'' wall cold rolled steel tubing for maximum strength and flex elimination. These trailing arms have fluted, greasable polyurethane bushings, which are superior to the stock rubber bushings. Tubular Trailing Arms are constructed from 1-1/4'' diameter, 0.120'' wall steel tubing which offers increased strength over other designs, but also have the added advantage of lighter weight. These trailing arms have fluted, greasable polyurethane bushings, which are superior to the stock rubber bushings. Heavy-Duty Adjustable Trailing Arms allow easy rear suspension adjustments for optimum handling and traction. Simply loosen the jam nuts and adjust the pinion angle without removing the arms from the vehicle. They replace soft OE differential bushings with polyurethane differential bushings, and they use a spherical ball or rod end assembly with UHMW polyethylene bushings on the chassis end to allow the rear suspension to move more freely and eliminate bushing bind. All parts sold in pairs. - Adjustable arms offer easy wheelbase and pinion angle adjustment - Direct fit options for many popular GM, Ford & Mopars - Easy, bolt-in install - Made in the USA This Part Fits: Year Make Model Submodel 1973-1977 Buick Regal Base 1976-1977 Buick Regal SR 1973 Chevrolet Chevelle Deluxe 1975 Chevrolet Chevelle Malibu 1975 Chevrolet Chevelle Malibu Classic 1975 Chevrolet Chevelle Malibu Classic Estate 1973-1977 Chevrolet El Camino Base 1975-1977 Chevrolet El Camino Classic 1977 Chevrolet El Camino Conquista 1973-1974 Chevrolet El Camino Custom 1973-1977 Chevrolet El Camino SS 1973-1974 Chevrolet Monte Carlo Base 1973-1974,1976 Chevrolet Monte Carlo Landau 1973,1975-1977 Chevrolet Monte Carlo S 1975,1977 Oldsmobile Cutlass 442 1973-1975 Oldsmobile Cutlass Base 1977 Oldsmobile Cutlass Colonnade 1976-1977 Oldsmobile Cutlass Colonnade S 1973-1977 Oldsmobile Cutlass S 1976-1977 Oldsmobile Cutlass Vista Cruiser 1973-1975 Oldsmobile Vista Cruiser Base 1973-1974,1976-1977 Pontiac Grand Prix Base 1975,1977 Pontiac Grand Prix LJ 1975-1977 Pontiac Grand Prix SJ 1973-1977 Pontiac LeMans Base 1973-1974 Pontiac LeMans Luxury 1973-1975,1977 Pontiac LeMans Safari 1974 Pontiac LeMans Safari Luxury 1973-1977 Pontiac LeMans Sport ## Details - **Price:** 598.78 CAD - **Vendor:** QA1 - **Type:** Control Arms ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 598.78 CAD | In stock | ## Images - Photo - Primary - Photo - Primary - Logo Image --- > Source: [Standard Auto Part](https://www.standardautopart.com/products/qa1-73-77-gm-a-body-lower-boxed-trailing-arms) > Updated: 2026-06-27