B&M 70502 CHEVY 8.2, 8.5 & 8.6 10 BOLT COVER WAS DESIGNED TO STRENGTHEN THE AXLE BY PREVENTING CASE DISTORT - Manual (Page 2)

remaining bolt but do not remove.
STEP 5. Carefully pry the cover
loose with a flat head screw driver,
being careful not to damage the
surface, and allow the oil to drain.
STEP 6. Remove the last bolt and
the cover once completely drained.
STEP 7. Using a dry lint free rag,
clean the accessible areas of the
axle housing and check internal
components for visible excessive
wear or other problems.
STEP 8. Clean all gasket material
from the axle housing surface
(See
Figure 2).
STEP 9. We recommend running a
5/16
”-18 tap through each threaded
cover hole on the axle housing to
ensure an accurate torque on all
bolts.
STEP 10. Install the supplied load
bolts in each boss from the inside of
the
B&M Cast Aluminum Rear End
Cover until they bottom out (See
Figure 3 & 4).
STEP 11. Apply a bead of RTV
silicone gasket maker to the
B&M
Cast Aluminum Rear End Cover.
Run the bead inside the bolt holes
(See Figure 4).
STEP 12. Install the B&M Cast
Aluminum Rear End Cover on the
axle housing using a supplied bolt
and washer at a bottom hole on the
cover so it can be used as a guide.
STEP 13. Install the rest of the
supplied bolts and washers and
torque to 15 ft/lb in a crisscross
pattern.
STEP 14. Screw in the two load
bolts by hand until they touch the
bearing caps. Torque the load bolts
to 5 ft/lb max.
NOTE: Do not over torque the
load bolts as you run the risk of
distorting the bearing caps,
creating abnormal wear and
premature failure.
STEP 15. Apply a very small amount
of RTV on the threads of the load
bolts and install on the two supplied
jam nuts on the load bolts. Torque
the jam nuts to 5 ft/lb.
STEP 16. Install the supplied
magnetic 1/4
” NPTF drain plug on
the B&M Cast Aluminum Rear End
Cover and tighten (See Figure 5).
STEP
17. Fill with factory
recommended gear oil using the
B&M Cast Aluminum Rear End
Cover fill plug hole (See Figure 5).
Add gear oil until oil runs out of the
axle housing fill hole.
STEP 18. Install the axle housing
fill plug and torque to 20 ft/lb.
STEP 19. Install the supplied 1/2”
NPT fill plug on the
B&M Cast
Aluminum Rear End Cover and
tighten.
STEP 20. Install and tighten any
other parts (e.g., sway bar, panhard
rod) if removed.
Owner’s
Manual/Maintenance
Booklet recommends replacing
axle lubricant anytime axle is
submerged in water. (Refer to
Owner’s
Manual/Maintenance
Booklet for details).
Figure 2
Axle housing surface
Figure 3
Load bolts