B&M 81020 HAMMER CONVERSION KIT User Manual

B&M For the car

The B&M Mustang Hammer C-4

Conversion Kit is intended for use
in a 1982-2000 Mustang that has had
a C-4, C-5, or C-6 transmission in-
stalled in place of the original AOD
transmission. This kit is used in con-
junction with the B&M Mustang Ham-
mer shifter (part Nos. 81001, 81002 or
81003). This kit includes a shifter
cable and transmission cable bracket
and shift lever for a C-4, C-5, and C-6
transmission.

Please read the instructions and

review the illustrations thoroughly be-
fore beginning the installation. The
installation of the shifter into the car
is covered in the instructions with the
shifter itself as well as these instruc-
tions. Follow the steps as shown be-
low.

INSTALLATION

STEP 1. Before the shifter is installed
in the car the Neutral safety switch,
the back up light switch and the cam
plate that operates the switches must
be installed on the shifter. Also a dif-
ferent cable pin must be installed on
the shifter to work with the B&M cable.

The cam plate is screwed onto shift

indicator arm with a #4 self tapping
screw. (See figure 1) Put a
lockwasher under the head of the

screw. If your shifter does not have this
hole drilled, use template #1 and drill
a .098” dia. (#40 drill) hole to install
the cam plate.

The switches are installed as

shown in figure 2. The switch sup-
port is attached to the shifter base
plate with two #10 screws and nuts. If
these two holes are not drilled in your
shifter, drill two 7/32” holes using tem-
plate #2.The two switches are installed
on the switch support with two #4
screws, nuts and lock washers. Put a
lock washer between the screw head
and the switch an each side in addi-
tion to the lock washer under the nut.

The cable pin on the shifter must

also be changed. (See figure 3) Re-
move the ball shaped cable pin and
replace it with the pin type cable pin
included in this kit. Tighten the nut
securely. The B&M cable bracket
spacer must also be installed. It is
secured to the BACK side of the
shifter cable bracket using the two #14
X 5/8” self tapping screws included
with shifter. (See figure 4)
STEP 2. Under the car remove the
nut and lockwasher holding the down-
shift linkage onto the downshift lever
shaft if there is any on your vehicle.
The downshift lever is the outer lever
on C-4, C-5, and C-6 transmissions.

Pull the lever off the shaft and allow
the linkage to hang free. Most C-4, C-
5, and C-6 transmissions have a Neu-
tral safety/Backup light switch on the
transmission shift lever. If your trans-
mission is so equipped, remove the
two bolts holding the switch in place
and slide it off the shift shaft. Discon-
nect the switch at the factory plug and
discard it. You will need to connect
the Neutral safety switch and backup
light switch wiring that is in this wiring
harness to the switches on the shifter.
STEP 3. 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 le-
ver 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 or
7). Install B&M selector lever onto shift
shaft of transmission. Align selector
lever so when it points straight down it
travels equal arcs in both directions
from center, then tighten 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 O-ring is in posi-
tion on downshift shaft and install
downshift lever in position on shaft.
Install lockwasher and nut and tighten

Installation Instructions

C-4, C-5, & C-6 Conversion Kit for

Mustang Console Hammer Shifter

Part No. 81020

9500696-02

Printed in the U.S.A.