B&M MEGASHIFTER User Manual
Installation Instructions
Megashifter
Part Number 80690
©2010, 2006, 2000 by B&M Racing & Performance Products
The B&M Megashifter shifter can
be used in vehicles equipped with most
popular three speed or four speed automatic transmissions. Your B&M Me-
gashifter comes equipped with neutral safety and backup light switches,
transmission brackets and levers and
a five foot shift cable. Optional shifter
cables in 2 ft. (#80830), 3 ft.(#80831),
4 ft.(#80832), 8 ft.(#80834), 10
ft.(#80835) and 12 ft. (#80836) are also
available. To use the B&M Megashift-
er with the Ford AOD transmissions
you will need the optional accessory
kit #40496. To use the B&M Megash-
ifter with a GM 4L60E or 4L65E transmission equipped with a PRNDL switch
you will need the optional accessory
kit #75498 otherwise you can use the
GM bracket supplied.
Please read the instructions and
review the illustrations thoroughly before beginning the installation.
The mechanical components of this
shifter are precision made and assembled at our factory. Any modification or disassembly of these parts can
cause the shifter to malfunction and
will void the warranty. You should disassemble only those items outlined in
the instructions.
The vehicle should be about 2 feet
off the ground for ease of installation.
Use jack stands, wheel ramps or a
vehicle lift. Make sure the vehicle is
firmly supported before attempting to
work on it.
IMPORTANT: If your vehicle is equipped
with a locking steering column, securing the column lock lever in the engine
compartment in the full up position will
allow the steering wheel to be locked
and unlocked and the ignition key to be
Printed in U.S.A.
removed.
WARNING: This allows the steering
wheel to be locked WHENEVER the
ignition key is turned to the “lock”
position WHILE THE VEHICLE IS MOVING, OR AT ANY OTHER TIME. Securing the steering column lock lever in
any other position will both PREVENT
the steering wheel from locking and
removal of the ignition key.
INSTALLATION
NOTE: If you are installing this shifter
with a four speed automatic transmission, you must remove the blocker pin
and the two e-clips indicated in Fig-
ures 1 and 3. Removing this blocker
pin gives the shifter four forward positions rather than three. For Ford AOD
four speed transmissions do not remove this blocker pin and the two eclips, since this transmission has only
three forward positions. Also do not
remove the blocker pin and the two eclips for three speed automatic transmissions.
STEP 1. Remove the stock shift linkage;
Column Shifters: Remove all rods,
levers or cables from the column and
the transmission. Place the column
shift lever in the Park position. Remove
the pin holding the shift lever in the
column and remove the lever assembly. If your vehicle is equipped with a
locking steering column, secure the
column lock lever in the full up position.
WARNING: This allows the steering
wheel to be locked and ignition key
removed WHENEVER the ignition key
is turned to the “lock” position WHILE
THE VEHICLE IS MOVING, OR AT
ANY OTHER TIME.
Console Shifters: Remove the shifter
mechanism from the console. Disconnect the rod or the cable from the
transmission. Remove the cable
bracket if equipped. If there is a cable
or linkage from the console shifter or
the transmission to the steering column lock, it must be blocked in the
Park position as described above.
NOTE: Shifter installation may require
console modification or complete console removal depending on the space
available in your vehicle.
STEP 2.Pull the carpet away from the
floorboard where the shifter is to be
mounted. If the vehicle has a bench
type seat, move the seat to the full
forward position. Place the shifter on
the floor with the stick shifted to the
rearmost gate position. Locate the
shifter for ease and convenience of
operation (See Figure 2). Make sure
the trigger and T-handle clear the dash
with the shifter in the Park position.
Mark the position of four mounting
holes on the floor.
STEP 3.Drill four 9/32" mounting holes
where marked. Temporarily mount the
shifter in place using washers as required to get it level. Do not bend the
mounting brackets on the bottom
of the shifter. Mark the location for the
shifter cable hole, 3" ahead of the left
front shifter mounting hole. 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.
9500418-09
Boot
Cover plate
Tower
Cable pin
1/4" nut
1/4" lockwasher
1/4" x 1/2"
bolt
E-Clip
Cable attaching tab goes on
outside surface of shifter base
Figure 1
STEP 4.Install (but do not secure) the
carpet back to it’s original position.
Cut holes in the carpet for the mounting 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 attachment screws will crack the switch
housings. Install the switch assembly
on the shifter. To adjust the switches,
loosen the screws and slide the
Remove this blocker pin
and the two e-clips
for
GM four speed transmis-
sions
Backup light
switch
Neutral safety
switch
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 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
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 required 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 engine 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 Motors 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 transmission. 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 overtighten as this can damage the pan
gasket.
STEP 12. Route the shifter cable according 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
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 13. Move the transmission selector lever by hand to the full rear
position (Low). Operate the shifter lever to the Low gear position (ratcheted
7.50"
1.00"
Figure 2
all the way back). Adjust the large nuts
on the cable so that the swivel will slide
into the front 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.
Note: The shifter will not operate
correctly unless the front hole in
the shift lever is used.
Leave the swivel out of the hole and
move the selector lever to Park, all the
way forward. Also move the shifter to
the Park position (all the way forward).
11.75"
TRIM AS
REQUIRED
Reinsert the swivel into the front hole
in the selector lever. Check to see that
the swivel will slide freely in and out of
the front hole in the selector 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.
Move the shifter back to the Low
gear position and check that the swivel
will still 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 impossible to correctly adjust
Remove this blocker
pin and the two e-
clips for GM four
speed transmissions
Washer (2)
Bracket
Figure 3
E-Clip
Indicator
cable
Sheet metal
screw (2)
Figure 4
3
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