B&M 80690 MEGASHIFTER - Manual (Page 2)

the shifter mechanism with two #6 x 3/
4" sheet metal screws and two #6
washers, the eyelet on the end of the
indicator cable is secured to the cable
pin by a supplied small e-clip.
STEP 8. Install the shifter mechanism
into the vehicle. Slide the shifter cable
through the carpet and the hole in the
floor. Bolt the shifter down using four 1/
4" x 1-1/2" hex bolts and nuts. If re-
quired use 1/4" washers as shims
between the shifter mechanism and
the floor to level the shifter. ROUTE
THE CABLE AS SHOWN IN FIGURE
4, AVOID SHARP BENDS WHICH
WILL KINK AND DAMAGE THE
CABLE. Use cable clamps or tie wraps
to secure the cable housing to the
chassis to avoid contact with hot en-
gine or exhaust system.
STEP 9. Seal the hole where the cable
goes through the floorboards to prevent
air or water leakage. A putty type
sealer can be used. For General Mo-
tors vehicles go to Step 10, for Ford
vehicles go to Step 15, for Chrysler
vehicles go to Step 21.
GENERAL MOTORS
STEP 10. If you have not already done
so, remove the stock selector lever nut
and the selector lever from the trans-
mission. Discard the stock lever and
the stock shifter linkage. Install the
B&M selector lever in position using
the stock selector lever nut (See Fig-
ure 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 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 between 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 12-13 lb.ft. Do not over-
tighten as this can damage the pan
gasket.
STEP 12. Route the shifter cable ac-
cording 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 lock washer from
2
switches in or out as required, then
retighten the screws.
STEP 6. Install the cable on the shifter
as shown in Figure 1. The cable at-
tachment tab should be bolted to the
outside surface of the shifter base
using a 1/4" x 1/2" hex bolt, lock
washer and nut. Install the e-clip that
secures the cable to the cable pin.
STEP 7. Just before the final installa-
tion of the shifter in the vehicle, attach
the indicator cable to the side of the
shifter as shown in Figure 3. The
indicator cable bracket is secured to STEP 4. Install (but do not secure) the
carpet back to it’s original position.
Cut holes in the carpet for the mount-
ing holes and the cable. DO NOT use
a drill bit to make holes in the carpet.
STEP 5. Assemble the neutral safety
and the reverse light switches to the
bracket using two #4-40 x 1" screws
and nuts, as shown in Figure 1. Be-
ware, over tightening the switch at-
tachment screws will crack the switch
housings. Install the switch assembly
on the shifter. To adjust the switches,
loosen the screws and slide the
1/4" nut
1/4" lockwasher
1/4" x 1/2"
bolt
Cable attaching tab goes on
outside surface of shifter base
Boot
Cover plate
Tower
E-Clip
Neutral safety
switch
Backup light
switch
Remove this blocker pin
and the two e-clips for
GM four speed transmis-
sions
Cable pin
Figure 1