B&M 80680 LIGHT TRUCK MEGASHIFTER - Manual (Page 6)

6
sion shift lever. On C-4, C-5 and C-6
transmissions, it will be necessary to
hook up the neutral safety/backup light
switches on the B&M Megashifter.
Locate and identify the neutral safety
(the engine will not crank unless these
wires are connected together), and the
reverse light wires. Disconnect the
battery ground cable before beginning
to wire the neutral safety and reverse
light switches. Reroute the wires to the
B&M Megashifter. Strip 1/4" of insula-
tion off the wires and install the
supplied slip-on terminals. Crimp the
terminals onto the wires using a
crimping tool or pliers. Connect the
neutral safety wires to the LOWER
switch and the reverse light wires to
the UPPER switch (See Figure 1). Tape
the terminal connections to prevent
shorts. Reconnect the battery ground
cable, disconnect the coil wire and set
the parking brake. Check the switch
operation by attempting to start the
motor in each shifter position. The
starter must crank only when the
shifter is in the Park or Neutral
position. Check the backup light
operation when the shifter is shifted to
the Reverse position. Adjust the
switches if required. Reconnect the
coil wire. Go to Step 29.
CHRYSLER
STEP 21. If you have not already done
so, loosen the pinch bolt on the throttle
lever on the transmission. This is the
lever on the small diameter shaft. Pry
the lever off with a screwdriver and
allow the linkage to hang free. Remove
and discard the stock shift lever and
the stock shift linkage. Install the B&M
selector lever in position and tighten
the pinch bolt securely (See Figure 8).
Make sure the lever is not pushed
down so far as to touch the transmis-
sion case. This will cause the lever to
bind on the case. The lever should
travel smoothly from front to back with
a positive click in each gear position.
Install the stock throttle lever in
position on the small diameter shaft
as removed and tighten the pinch bolt
securely. The throttle lever must
operate smoothly.
STEP 22. Remove the two transmission
oil pan bolts directly below the shift lever.
Install the cable bracket in position (See
Figure 8) with two spacers between the
pan and the bracket. (If your transmis-
sion is equipped with a cast aluminum
oil pan these spacers can be omitted.)
Install the two 5/16-18 x 1.00" pan bolts
supplied and tighten to 12-13 lb.ft. Do not
overtighten as this can damage the pan
gasket.
STEP 23.Route the shifter cable accord-
ing to Figure 4. Avoid kinks and sharp
bends and route the cable away from hot
to see that the swivel will slide freely in
and out of the hole in the 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 in both the Low and the
Park positions. Operate the shifter
through all the gear positions. Check to
make sure the swivel will slide in and out
of the selector lever hole in each gear
position. Install the cotter key supplied
with the shifter into the swivel and spread
the key ends.
If you have a problem, DO NOT FORCE
THE SHIFTER, this will damage the cable,
the shifter or the transmission. Simply
start at the beginning and carefully check
all your steps.
IMPORTANT: Do not froce the shifter to
over travel into the Park position. This will
move the shifter into GM Park position
and will damage the cable or the trans-
mission.
STEP 20. On Ford vehicles, the neutral
safety/backup light switch is located on
the transmission (or on the steering col-
umn on some early vehicles). If the ve-
hicle has an AOD transmission the neu-
tral safety/backup light switches on the
B&M shifter will NOT be used. The neutral
safety/backup light switch on AOD trans-
missions will continue to function nor-
mally.
On the C-4 and C-5 transmissions it is
necessary to completely remove the
stock neutral safety/backup light switch
in order to install the B&M transmis-
7/16" nut
Cable swivel
Cotter pin
Chrysler lever
Chrysler cable
bracket
1/4" x 1-1/2" bolt,
lockwasher, nut
5/16" x 1" bolt and spacer
Chrysler A-727 and A-904
Figure 8
Figure 9