2
Rev. 11202015
Note:
Do not make any adjustments to your new torque arm prior to installation. Your new torque arm comes adjusted to
stock configuration. Pinion angle adjustments are very tricky and should only be done by someone with a good
understanding and knowledge of how to make proper adjustments. If adjustments are made to pinion angle, it is very
important the rod end sits straight up and down and not angled between the differential brackets and that you have a
minimum of 1” of thread engagement. In the adjuster sleeve and rod ends or it could cause the part to fail. Improper
adjustment, defective, worn, or inadequate suspension components as mentioned above could cause torque arm to fail
causing damage or injury.
A drive on vehicle lift is recommended for proper and easy installation.
Before starting, check and record current pinion angle. Vehicle should be on level surface and in correct ride position to
obtain correct information.
INSTALLATION
1.
If a drive on lift is unavailable, raise and support the vehicle under the
frame rails so the rear end can be raised and lowered, as needed.
2.
Remove the two large bolts that attach the stock torque arm to the
differential and remove the stock torque arm. Inspect the bolts and
replace, if necessary. (Use only OE bolts and OE style lock nuts)
3.
Unbolt and remove the front bushing bracket assembly from the
transmission.
4.
Drill or grind off the rivet heads (See
Figure 2
) and disassemble the
mounting bracket assembly. Discard the factory rubber bushings.
5.
Reinstall the inner bracket onto the transmission with only the lower bolt
and stud at this time using thread locking compound.
6.
Install the QA1 torque arm onto the rear axle with the OE bolts using
thread locking compound. Do not torque the bolts at this time. Due to
tolerances, it may be necessary to file or grind the lower rear corner of the
differential casting to allow the differential bracket to sit flush against the
housing.
7.
Apply the supplied grease to the inside of the new polyurethane front bushing and slip the bushing onto the torque arm
with the part number on the bushing facing the rear of the vehicle.
8.
Position the polyurethane bushing in the inner bracket and install the outer bracket, then (using thread locking
compound) install the upper bolt and tighten both bolts and stud to the factory torque specifications.
9.
At this time, torque the rear differential attaching bolts to 97 lb. ft.
10.
After driving the vehicle 10-20 miles, it is very important to re-torque all hardware; OE differential bolts (97 lb. ft.). Rod
end jam nuts (90 lb. ft. using a 1-1/8” crows foot socket on torque wrench).
To further upgrade your suspension, use other QA1 suspension products such as coil-overs, shocks, struts, springs,
K-members, torque arms, panhard rods, sub-frame connectors, strut tower braces, rod ends, sway bars, tubular control
arms, spherical bearings, carbon fiber driveshafts and more. For more information, please visit www.QA1.net.
