B&M 80680 LIGHT TRUCK MEGASHIFTER - Manual (Page 2)

2
and 3-1/2" ahead of this bolt. (The hole
will be 3-1/2" ahead if the bracket is at
maximum height and 2-1/2" ahead if the
bracket is adjusted to minimum height.
Drill or cut a 1-1/2" diameter cable hole in
the floorboard. NOTE: Some floorboards
are extremely thin and will not adequately
support the shifter mechanism when
bolted to the floor. For those vehicles we
recommend that you fabricate a stiffener
plate for additional strength.
STEP 5. Remove the mounting bracket
assembly. Tighten the four screws se-
curely. At each end, drill a 1/4" hole through
one of the locking holes in each end of the
bracket into the top plate. Put a 1/4" screw
and a lock washer into each of these
holes to lock the bracket together. Attach
the shifter to the mounting bracket with
four 1/4-20 X 3/4" screws and lock wash-
ers.
STEP 6. Install (but do not secure) the
carpet back to it’s original position. Cut
holes in the carpet for the mounting holes
and cable. DO NOT use a drill bit to make
the holes in carpet.
STEP 7. Assemble neutral safety and
reverse light switches to the bracket us-
ing two #4-40 x 1" screws and nuts, as
shown in Figure 1. Beware, over tighten-
ing the switch attachment screws will
crack the switch housings. Install the
switch assembly on the shifter. To adjust
the switches, loosen the screws and
slide the switches in or out as required,
then retighten the screws.
STEP 8. Install the cable on the shifter
as shown in Figure 1. The cable attach-
ment tab should be bolted to the outside
surface of the shifter base using a 1/4" x
1/2" hex screw, lock washer and nut.
Install the e-clip that secures the cable to
the cable pin.
STEP 9. Just before the final installation
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 the shifter mecha-
nism with two #6 x 3/4" sheet metal
screws and #6 washers, the eyelet on the
end of the indicator cable is secured to
the cable pin by a supplied small e-clip.
STEP 10.Install the shifter mechanism
into the vehicle. Slide the shifter cable
through the carpet and the hole in floor.
Bolt the shifter down using four 1/4-20 x
1-1/2" full thread hex screws, nuts, lock
washers and flat washers. If the mount-
ing bracket does not sit flat of the floor, the
tabs at the end of the mounting bracket
can be bent so that they will fit the floor.
ROUTE THE CABLE AS SHOWN IN FIG-
URE 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 engine or exhaust sys-
tem.
STEP 11.Seal the hole where the cable
goes through the floorboards to prevent
Figure 1
10-24 x 1/2'
flat head
E-Clip
Mounting
base
1/4-20 x 3/4"
screw with 2
flat washers
and lock
washer
1/4-20 x 3/4"
screw with flat
washer and lock
washer
Cable attaching tab
goes on outside sur-
face of shifter base
1/4-20 x 1/2"
screw
1/4" nut and
lockwasher
Tower
Cover plate
Boot
10-32 x 3/4"
Pan head
Neutral safety
switch
Backup light
switch
Locking
holes
Cable pin
#4-40 x 1-1/4
screws, nuts and
lock washers
1/4-20 x 1-1/2
full thread
screws
Remove this
blocker pin and
the two e-clips for
GM four speed
transmissions