2005–2014 Mustang J&M On-Car Adjustable Lower Control Arms — Poly/Rod

J&M Part #23966 is a complete pair of on-car adjustable rear lower control arms for the 2005–2014 S197 Mustang. The poly/rod design places a 95-durometer synthetic elastomer bushing at the chassis and a chromoly spherical rod end at the axle.

Adjusting the left and right arm lengths allows you to square the rear axle and correct thrust angle without removing the arms. Pinion angle is adjusted with the upper control arm.

Each arm is built from 1.250-inch OD x .120-inch wall DOM steel tubing using pulse-welded construction. CNC-machined threaded tube adapters are rosette-welded in place, and a chromoly adjuster allows on-car adjustment.

The chassis bushings do not use grease fittings. Each pair includes a tube of waterproof synthetic grease formulated specifically for these bushings. Apply the included grease during initial bushing assembly.

At the axle, the chromoly spherical rod end features a heat-treated 52100 steel ball, a 4340 chromoly race, and a PTFE-impregnated sintered-bronze liner. This construction combines the strength of sintered bronze with the low-friction properties of PTFE, providing greater strength and durability than a standard PTFE liner.

The included 6061-T6511 aluminum offset step bushings have a 14 mm inside diameter and retain the factory mounting bolt.

Choose the right version:
23966 — Steel poly/rod version (this page)
23961 — Aluminum rod/rod version
23961S — Steel rod/rod version

Choose your black or red powder-coat finish before adding the control arms to your cart.

Warranty: Lifetime warranty on the control arms and a three-year warranty on the spherical rod ends.

Key Features & Benefits

• Complete pair of rear lower control arms
• On-car adjustment for rear-axle squareness and thrust angle
• Poly/rod configuration with a 95-durometer synthetic elastomer chassis bushing
• 1.250-inch OD x .120-inch wall DOM steel tubing
• Pulse-welded construction
• CNC-machined, rosette-welded threaded tube adapters
• Chromoly on-car adjusters
• No grease fittings; waterproof synthetic grease included for initial bushing assembly
• Chromoly spherical rod ends ends with heat-treated 52100 steel balls and 4340 chromoly races
• PTFE-impregnated sintered-bronze liners for greater strength and durability than standard PTFE liners
• 6061-T6511 aluminum offset step bushings with a 14 mm inside diameter for the factory mounting bolts
• Direct bolt-on installation
• Black or red powder-coat finish
• Made in the USA
• Lifetime warranty on the control arms
• Three-year warranty on the spherical rod ends