B&M 80680 LIGHT TRUCK MEGASHIFTER - Manual (Page 4)

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slide easily in and out of the front hole in
the selector lever. (If you do not use the
front hole in the lever, it will be impos-
sible to correctly adjust the cable.) Oper-
ate the shifter through all the gear posi-
tions. Check to make sure the swivel will
slide in and out of the front selector lever
hole in each gear position. The shift cable
is now correctly adjusted. Install the cot-
ter 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.
STEP 14. On GM vehicles, the neutral
safety switch may be located on the
shifter (steering column or console), or it
may be a mechanical interlock in the
steering column that prevents the key
from turning to the Start position unless
the shifter is in the Park or Neutral posi-
tion. Identify the type of neutral safety sys-
tem you have. If the key will not turn to the
Start position unless the stock shifter is
in Park or Neutral, you have a mechanical
interlock type, otherwise you have a neu-
tral safety switch type. If you have a neu-
tral safety switch, locate the switch and
identify the neutral safety wires (engine
will not crank unless these wires are con-
nected together). With either type, discon-
nect the battery ground cable to prevent
accidental shorts. If you have a neutral
safety switch, disconnect and extend both
wires from the GM switch to the switch on
the shifter. If you have a mechanical inter-
lock cut the wire that goes from the Start
position on the ignition switch to the sole-
noid on the starter. This wire is usually a
10 or 12 gauge purple wire. Run wires
the coil wire. Go to Step 27.
FORD
STEP 15. If you have not already done so,
remove the nut and 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. Re-
move 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
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
terminals onto the wires using a crimp-
ing tool or pliers. Connect the wires to the
switch on the shifter. Tape the terminal
connections and all other 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.
Adjust the switch if required. Reconnect
Figure 4
Figure 5
Cable swivel
Cotter pin
(Use front hole) GM cable bracket (Trimming of bracket
required if used on cast aluminum pan)
Use these two holes for
TH-400 transmission. Use
other two holes for other
GM transmissions
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Spacer
GM lever
5/16 x 1" bolt and spacer
(Metric trans use M8 x 25 bolt)
7/16" nut
GM cable bracket
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