Lower Control Arms

From 3.8Wiki

[edit] Overview

Lower control arms connect the axle assembly to the chassis on all Mustang models. They form the outermost links on both the 4-link suspension, found on 1979-2004 Mustangs, as well as on the three link suspensions found on 2005 and newer Mustangs.

Several pre-2005 Mustang GT models included a "quad-shock" suspension set-up which featured a pair of laterally-mounted shocks that extended from the axle tubes to the chassis behind the axle to prevent "wheel hop" on hard launches. For more information on Mustang suspension basics, please visit this site.

[edit] Modification of Rear Control Arms

It has been shown that replacing the lower control arms on Mustangs with stiffer arms that feature harder bushings or spherical bearings can help correct suspension problems, help better locate the rear axle, and increase rear grip.

Most aftermarket rear control arms are sold for 1979 through 1998 and 1994 through 2004 model years. The only difference between years is the 1979-98 arms were retained at both the chassis and the axle with 12mm bolts, while 1999-04 Mustangs had 14mm bolts at both connection points. According to Maximum Motorsports, their company can assemble custom packages with the proper crush sleeves for a 1999-04 Mustang on the chassis end of the control arm and 1979-98 inserts on the axle end for V6 Mustangs with pre-1999 8.8" rear axle assemblies. Maximum Motorsports does state the 14mm bolt is a stronger option, since the bolt is sturdier and they use harder material for the inner bushing sleeves for the 1999-04 version. The harder steel is required due to the reduced wall thickness of the sleeve.