Www.bmrfabrication.com – BMR Suspension AA030 User Manual
Page 2
BMR A-ARM INSTALLATION INSTRUCTIONS FOR GENERAL MOTORS TYPE SUSPENSIONS
UPPER A-ARMS with OE SPINDLE
1. Lift vehicle and support with jack stands under the frame locations. Remove wheels and tires.
2. Begin with one side of the vehicle. Remove the two caliper bolts and slide the caliper off the rotor. Leaving the brake line
connected, tie the caliper up out of the way using a bungee cord or zip tie.
3. Turn the spindle in one direction to gain access to the castle nut of the upper ball joint. Remove the cotter pin and loosen the
castle nut but DO NOT remove it. Using a brass hammer, hit the spindle around the ball joint mounting hole until the ball
joint pops loose. A pickle fork may also be used for loosening the ball joint.
4. Position a floor jack under the lower A-arm and lift the A-arm until there is no spring tension on the ball joint. Remove the
castle nut. Pivot the upper A-arm up until the ball joint comes out of the spindle.
5. Remove the two nuts that attach the upper A-arm to the frame. Remove the shims located between the A-arm cross shaft and
frame and set aside in proper order for re-assembly. Slide the A-arm towards the motor until the cross shaft clears the
mounting studs and remove the A-arm. NOTE: In some instances, aftermarket headers may need to be removed in order to
remove and install the upper A-arm.
6. Install the BMR upper A-arm over the studs using the original shims. Tighten the nuts.
7. Pivot the A-arm down until the ball joint goes through the spindle. Tighten the castle nut and install a new cotter pin.
8. Re-install the caliper.
9. Repeat steps 2-8 for the other side.
10. Insert 2-3 pumps of grease into each ball joint.
11. Re-install the wheels and tires. Lower vehicle.
BMR recommends having the car aligned after the A-arm installation (See recommended alignment settings on Page 3). For optimum
life, re-grease the ball joints after 500 miles and then every other oil change. Grease lower A-arm bushings every 5000 miles.
WWW.BMRFABRICATION.COM
This product is an aftermarket accessory and not designed by the vehicles manufacturer for use on this vehicle. As such, buyer
assumes all risk of any damage caused to the vehicle/person during installation or use of this product.
PAGE 2