Edelbrock 25-4066 User manual

©2006 Edelbrock Corporation
Catalog #5267, #5268, & #5269
Brochure #63-0357
Rev. 6/06- DA/mc
Page 1 of 2
EDELBROCK UPPER TRAILING ARMS
for 1978-1988 GM A/G Body (Catalog #5267)
1968-1972 GM A-Body (Catalog #5268)
1964-1967 GM A-Body & 1967-1978 American Motors Rebel,
Matador, Marlin, and Ambassador (Catalog #5269)
INSTALLATION INSTRUCTIONS
Please study these instructions carefully before installing your new Trailing Arms. If you have any questions, please
contact our Technical Hotline at: 1-800-416-8628, 7:00 am to 5:00 pm, Monday through Friday, Pacific Standard Time
or e-mail us at [email protected]. Please fill out and mail your warranty card.
Suggested Tools for Installation:
❑Jack and proper load rated jackstands
❑Tire chocks
❑Lug wrench
❑18mm or 3/4” socket and combination wrench
❑Torque wrench
❑Blue Loctite
❑Grease gun
KEEP FLOORJACK UNDER VEHICLE DURING THE
COMPLETE REMOVAL AND INSTALLATION PROCEDURE.
CAUTION: DO NOT REMOVE BOTH TRAILING ARMS
AT THE SAME TIME OR THE AXLE WILL ROTATE AND
THE TRAILING ARM INSTALLATION WILL BE MUCH
MORE DIFFICULT.
4. Start with either trailing arm and remove the rear
bolt. NOTE: Replace the bolts in same direction as
original (see Figure 2) .
REMOVAL OF STOCK TRAILING ARMS
1. Place vehicle on level surface and place tire chocks
in front of and behind front tires.
2. Support rear of the vehicle on jackstands and
remove the rear wheels. Use proper rate
jackstands on hard level surface (see Figure 1) .
3. Place a floorjack under the differential and lift up
slightly to remove tension from the trailing arms
bolts. Make sure not to lift the vehicle off the
jackstands (see Figure 1) .
Figure 1
Kit Contents
Qty.Part # Description
2 25-4066 Upper Trailing Arms (#5267)
2 25-4067 Upper Trailing Arms (#5268)
2 25-4068 Upper Trailing Arms (#5269)
Figure 2
IMPORTANT NOTE:
Proper installation is the responsibility of the installer. Improper installation will void warranty and may
result in poor performance and engine or vehicle damage.

©2006 Edelbrock Corporation
Catalog #5267, #5268, & #5269
Brochure #63-0357
Rev. 6/06- DA/mc
Page 2 of 2
5. Remove the front trailing arm bolt.
6. If you are having difficulty removing the trailing
arm bolts, then remove the lower shock bolts and
the rear springs to aid bolt removal.
7. Clean frame at trailing arm pivot area with a wire
brush.
8. Remove the pressed-in factory rubber bushing
from axle housing. Note direction of bushing in
axle housing. Be careful not to damage axle
housing (see Figure 3) .
INSTALLATION INSTRUCTIONS
NOTE: Edelbrock Trailing Arms are fully assembled,
greased, and ready to install.
1. Install polyurethane bushing into axle housing,
facing same direction as stock (See Figure 3).
2. Install polyurethane thrust washer on inboard side
of bushing. NOTE: Left side only, some thrust
washers will require trimming for clearance to axle
housing (See arrow on Figure 3 ). If you install
thrust washer at the same time as you install
bushing, it requires less grinding for clearance.
3. Lube (supplied) the trailing arm bushing and the
axle bushing on the surface that contact arms.
4. Install new trailing arms with the grease fittings
facing down, locating the front bolt first (See
Figure 4). Use heavy supplied 1/2 washer on this
end.
Figure 3
Figure 4
5. Place one drop of blue Loctite on clean threads and
torque the nut to 70 ft./lbs.
6. The trailing arm should then pivot smoothly on the
chassis.
7. Pivot trailing arm into position over polyurethane
bushing and thrust washer. Install rear bolt in
same direction as original. Figures 2, 3, & 4
show correct installed position of both
trailing arms.
8. Although Edelbrock trailing arms are pre-lubed,
you may want to finish your installation by lubing
the front bushing with a grease gun. Be sure to
install zerk caps to prevent dirt and corrosion from
damaging the fitting.
Check all nut and bolt tightness after first 10 miles.
Edelbrock Corporation
2700 California Street
Torrance, CA 90503
Toll-Free Tech Line: 1-800-416-8628
Tech E-Mail: [email protected]