B&M HAMMER SHIFTER User Manual
Installation Instructions
Hammer Shifter
Part No. 80885 & 80887
©2010, 2006, 2005, 2004, 1999 by B&M Racing and Performance Products
(Visit www.bmracing.com for additional products and product information)
The B&M Hammer shifter can be used in
vehicles equipped with most popular three
speed or four speed automatic transmissions.
Your B&M Hammer 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 Hammer
with the Ford AOD transmissions you will
need optional accessory kit #40496. To use
the B&M Hammer with a GM 4L80E or 4L85E
transmission equipped with a PRNDL switch
you will need the optional accessory kit #75498
otherwise you can use the GM bracket supplied.
To use this shifter with a GM four speed
automatic transmission (TH-700R4, TH-200
4R, 4L60,4L80E or 4L85E) you will need to
remove the three speed blocker bolt and nut.
(See figures 1 and 3.) For the Ford AOD four
speed transmission do not remove this bolt.
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 removed.
WARNING: This allows the steering wheel to
be locked WHENEVER the ignition key is turned
to the “lock” position WHILE THE VEHICLE IS
Printed in the U.S.A.
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 GM
TH-700R4, TH-200 4R, 4L60, 4L80E or a
4L85E four speed automatic transmission you
must remove the bolt and nut indicated in
figures 1 and 3. Removing this bolt gives the
shifter four forward positions rather than
three. For Ford AOD four speed transmissions
do not remove this bolt and nut, since this
transmission has only three forward positions. Also do not remove the bolt and nut for
three speed automatic transmissions.
STEP 1. Remove stock shift linkage;
Column Shifters: Remove all rods, levers or
cables from column and transmission. Place
column shift lever in “Park” position. Remove
pin holding shift lever in column and remove
lever assembly. If your vehicle is equipped
with a locking steering column, secure the
column lock lever in the full up position. WARN-
ING: 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 shifter mechanism from console. Disconnect rod or cable
from transmission. Remove cable bracket if
equipped. If there is a cable or linkage from the
console shifter or 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 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 mounting brackets on
bottom of shifter. Mark the location for the
shifter cable hole, 3" ahead of the left front
shifter mounting hole. Drill or cut 1-1/2" diameter cable hole in 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 4. Install (but do not secure) 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 holes in carpet.
STEP 5. Assemble Neutral Safety and Re-
verse light switches to bracket using two #440 x 1" screws and nuts, as shown in figure
1. Beware, Over tightening the switch attach-
ment screws will crack the switch housings.
Install Switch assembly on shifter. To adjust
switches loosen screws and slide switches in
or out as required, then retighten screws.
STEP 6. Install cable on shifter as shown in
figure 1. The cable attachment tab should be
bolted to the outside surface of the shifter
base using 1/4" x 1/2" hex bolt, lock washer
and nut. Install the E-Ring that secures the
cable to the cable pin.
STEP 7. Before the final installation of the
shifter in the vehicle, add longer wires to the
indicator light (LED) and attach the indicator
cable to the side of the shifter. Attach longer
wires to the indicator light leads, use butt
splices or solder and tape the wires. The
extension wires should be color coded or
marked, since they must be connected with
the correct polarity. The black wire must go to
ground and the red wire must go to a 12 volt
positive (+) supply. The LED will not illuminate
if they are connected backwards. The red
9500575-04
Boot
Top plate
Tower
Shifter #80885
Cable pin
1/4" nut
1/4" lockwasher
1/4" x 1/2"
bolt
E-Ring
Cable attaching tab goes on
outside surface of shifter base
Figure 1
wire must be connected to a source that is hot
when ever the ignition is turned on, since the
shifter indicator will not be visible, even in
daylight, unless it is illuminated. The ground
wire can usually go to one of the bolts that hold
the shifter to the floor. The hot wire will
probably have to go to the instrument panel.
After the wires are lengthened, slide the
indicator in the shifter top plate all the way to
the rear, the end away from the cable connection. Then tape the two wires to the indicator
cable just ahead of the cable mounting bracket.
Shifter #80887
Remove this blocker
pin and the two e-clips
for GM four speed
transmissions
Back-up light
switch
Neutral safety
switch
Leave a little slack in these wires with the
indicator all the way to the rear. About 3”
further down the cable tape the wires to the
cable again. See figure 4.
Secure the indicator cable bracket to the
shifter mechanism with two #6 x 1/4" sheet
metal screws and #6 washers. (Do not use
longer screws in this position or they will
cause the mechanism to bind.) The eyelet on
the end of the indicator cable is secured to the
cable pin by a supplied small E-Ring, as shown
in figure 3.
STEP 8. Install shifter mechanism into vehicle. Slide shifter cable through carpet and
hole in floor. Bolt 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 floor to level shifter. ROUTE
CABLE AS SHOWN IN FIGURE 5, AVOID
SHARP BENDS WHICH WILL KINK AND DAMAGE CABLE. Use cable clamps or tie wraps
to secure the cable housing to 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 got 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 selector lever from the transmission. Discard stock
lever and stock shifter linkage. Install B&M
selector lever in position using stock selector
lever nut, (See figure 6). Torque 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 cable bracket in position, (See
figure 6.) The bracket must be installed with
two spacers between the pan and 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 ft.
lbs. Do not overtighten as this can damage
pan gasket.
Note: In some cases possible modification to the GM cable bracket might be
required for the 4L80E and 4L85E transmissions without the PRNDL switch.
Verify that selector lever does not grind
on cable bracket before moving on to
step 10.
STEP 12. Route the shifter cable according to
figure 5. 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 large nut
and lockwasher loosely over end of cable.
Install two rubber boots onto end of 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 full rear position (LOW). Operate 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
2
6.6
4
1.00
Trim as
required
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 PARK position
(all the way forward). 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
10.50
6.30
10.36
Figure 2
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
the cable.) Operate shifter through all gear
positions. Check to make sure swivel will slide
in and out of the front selector lever hole in
each gear position. The shift cable is now
correctly adjusted. Install cotter key supplied
with shifter into swivel and spread 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
position. Identify the type of neutral safety
system 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 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 either type, disconnect 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
Remove this blocker pin and
the two e-clips for GM four
speed transmissions
Washer (2)
Bracket
Figure 3
E-Ring
Indicator
cable
Sheet metal
screw (2)
Tape wires to indicator cable
close to cable bracket and
about 4" further along cable
Adjust indicator
cable bracket to
center LED indicator
Slide indicator all the way in this
direction. Leave a little slack in wires.
Figure 4
3
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