B&M 80685 MEGASHIFTER, RHD - Manual (Page 5)

install the downshift lever in position on
the shaft. Install the lockwasher and
the nut and tighten securely. The down-
shift lever must operate smoothly. Re-
connect the downshift linkage.
STEP 17. Cable bracket installation:
AOD: Instructions for the AOD are
included with the optional installation
kit, Part No. 40496.
C-4, C-5: Remove the two lower bolts
from the rear servo cover. Install the
cable bracket in position (See Figure
6). Install the two servo cover bolts as
removed and tighten to 12-13 lb.ft. Do
not overtighten as this can distort the
servo cover.
C-6: Remove the two transmission oil
pan bolts from the left rear corner of the
oil pan. Install the cable bracket in
position with the two spacers between
the pan and the bracket (See Figure
7). (If your transmission is equipped
with a cast aluminum oil pan, these
spacers can be omitted.) Install the
two 5/16-18 x 1.00" bolts supplied and
tighten to 12-13 lb.ft. Do not over-
tighten as this can damage the pan
gasket.
STEP 18. 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 lockwasher 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
position it in the center of the threaded
portion.
STEP 19. Move the transmission se-
lector lever by hand to the full rear
position (Low). Place 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 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.
With the swivel in the selector le-
ver, move the shifter to the Park posi-
tion, as far forward as the shifter will go
without forcing it. (The shifter has fur-
ther travel that is used to reach the GM
Park position but is not used on the
Ford transmissions. Trying to force the
cable will damage the cable.) The shift
lever on the transmission should be all
the way forward. Check to see that the
swivel will slide freely in and out of the
shifter is in Park or Neutral, you have a
mechanical interlock type, otherwise
you have a neutral safety switch type. If
you have a neutral safety switch, locate
the switch and identify the neutral safety
wires (engine will not crank unless these
wires are connected together). With ei-
ther type, disconnect the battery ground
cable to prevent accidental shorts. If you
have a neutral safety switch, discon-
nect and extend both wires from the GM
switch to the switch on the shifter. If you
have a mechanical interlock cut the wire
that goes from the start position on the
ignition switch to the solenoid on the
starter. This wire is usually a 10 or 12
gauge purple wire. Run wires from both
ends of the cut wire to the switch on the
shifter. Put slip on terminals on the ends
of the lengthened wire. Crimp the termi-
nals onto the wires using a crimping tool
or pliers. Connect the wires to the
LOWER switch on the shifter. Idenify
the wires for the backup lights and run
them to the UPPER switch on the shifter.
Tape the terminal connections and all
other connections to prevent shorts. Re-
connect the battery ground cable, dis-
connect 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. Adjust the
switches if required. Reconnect the coil
wire. Go to Step 27. FORD
STEP 15. If you have not already done
so, remove the nut and the lockwasher
holding the downshift linkage onto the
downshift lever shaft. The downshift
lever is the outer lever on C-4, C-5, C-
6 and AOD transmissions. Pull the
lever off the shaft and allow the linkage
to hang free. Remove and discard the
stock shift linkage rods. Some C-6 and
all (late) C-4 and C-5 transmissions
have a neutral safety/backup light
switch on the transmission shift lever.
If your transmission is so equipped,
remove the two bolts holding the switch
in place and slide it off the shift shaft.
Disconnect the switch at the factory
plug and discard it.
STEP 16. Install the B&M selector le-
ver (See Figure 6 or 7). Note: The
B&M lever must point downward for
proper operation. If the stock shift lever
on your transmission points down, you
will have to remove the lower part of the
stock arm by cutting it off to clear the
B&M lever (See Figure 6 ). Install the
B&M selector lever onto the shift shaft
of the transmission. Align the selector
lever so when it points straight down it
travels equal arcs in both directions
from the center, then tighten the 1/4"-
20 x 1 1/2" pinch bolt and nut. The lever
should travel smoothly from front to
back with a positive click in each gear
position. Make sure the O-ring is in
position on the downshift shaft and
5
Cable swivel
Cotter pin
1/4" x 1-1/2" bolt,
lockwahsher, nut
C-6 cable
bracket
7/16" nut
5/16" x 1" bolt
and spacer
Ford
lever
Ford C-6
Figure 7