B&M 80680 LIGHT TRUCK MEGASHIFTER - Manual (Page 3)

3
air or water leakage. A putty type sealer
can be used. For General Motors ve-
hicles go to Step 12, for Ford vehicles got
to Step 17, for Chrysler vehicles go to
Step 23.
GENERAL MOTORS
STEP 10.If you have not already done so,
remove the stock selector lever nut and
the selector lever from the transmission.
Discard the stock lever and the stock
shifter linkage. Install the B&M selector
lever in position using the stock selector
lever nut (See Figure 5). Torque the nut to
23 lb.ft. The lever should move smoothly
from front to rear with a positive click in
each gear position.
STEP 11.Remove the two transmission
oil pan bolts from the middle of the left
side of the oil pan. Install the cable bracket
in position (See Figure 5). The bracket
must be installed with two spacers be-
tween the pan and the bracket. (If your
transmission is equipped with a cast
aluminum oil pan, these spacers should
be omitted. With a TH-400 with a cast
aluminum oil pan the cable bracket may
have to be modified.) Install the two 5/16-
18 x 1.00" bolts (Metric transmissions
use the two 8mm x 25mm bolts) supplied
and tighten to 12-13 lb.ft. Do not over-
tighten as this can damage the pan gas-
ket.
STEP 12.Route the shifter cable accord-
ing to Figure 4. Avoid kinks and sharp
bends and route the cable away from hot
engine or exhaust parts.
Remove the two rubber boots, one
large nut, and a large lockwas her from
the threaded end of the shifter cable.
Slide the end of the cable into the cable
bracket. Install the large nut and the
lockwasher loosely over the end of the
cable. Install the two rubber boots onto
the end of the cable. Install the swivel on
the threaded end of the cable and posi-
tion it in the center of the threaded portion.
STEP 13.Move the transmission selec-
tor lever by hand to full rear position
(Low). Operate the shifter lever to the Low
gear position (ratcheted all the way back).
Adjust the large nuts on the cable so that
the swivel will slide into the front hole on
the selector lever. Tighten the large nuts
completely. Be sure that the swivel will
slide freely in and out of the hole in the selector lever. Note: The shifter will not
operate correctly unless the front hole
in the shift lever is used.
Leave the swivel out of the hole and
move the selector lever to Park, all the
way forward. Also move the shifter to the
Park position (all the way forward). Rein-
sert the swivel into the front hole in the
selector lever. Check to see that the swivel
will slide freely in and out of the front hole
in the selector lever in this position. If it
does not slip in freely, adjust the swivel
slightly until it will slip into the hole in the
lever.
Move the shifter back to the Low gear
position and check that the swivel will still
Figure 2
Figure 3
Indicator
cable
E-Clip
Sheet metal
screw (2)
Bracket
Remove this blocker pin
and the two e-clips for GM
four speed transmissions
Washer (2)