B&M 40263 SHIFT IMPROVER KIT User Manual
Page 4
screwdriver to hold the pressure regu-
lator assembly in while removing the
retaining clip. If the sleeves stick in
the bore, lightly punch the sleeve with
a small rod and a mallet allowing it to
snap back out of the bore. Remove
Sleeve with Boost Valve and the out-
ermost pressure regulator spring. Re-
place the stock outer pressure regula-
tor spring with the RED spring sup-
plied in the kit. Reassemble pressure
regulator in reverse order of disas-
sembly.
STEP 6. Heavy Duty Only; 1-2 Ca-
pacity Modulator. Remove the re-
taining clip at the end of the 1-2
Capacity Modulator bore (See Fig.
4). Remove the bore plug, 1-2 Capac-
ity Modulator valve and spring from
bore. On later model valve bodies
use the M4x40 (4mm metric screw
supplied in kit) in tapped hole to assist
removing bore plug. Early valve bod-
ies do not have a hole in the bore plug
so you will have to pry the plug out
with a small screw driver. Replace the
stock spring with the YELLOW spring
supplied in kit. Reassemble spring,
valve and bore plug (tapped hole fac-
ing out) and install retaining clip.
STEP 7. Street Only; 1-2 Capacity
Modulator. Remove the retaining clip
at the end of the 1-2 Capacity Modu-
lator bore (See Fig. 4). Remove the
bore plug, 1-2 Capacity Modulator
valve and spring from bore. On later
model valve bodies screw the M4x10
(4mm metric screw supplied in kit) in
tapped hole to assist removing bore
plug. Early valve bodies do not have
a hole in the bore plug so you will have
to pry the plug out with a small flat
screw driver. Replace the stock spring
with the GREEN spring supplied in
kit. Reassemble spring, valve and
bore plug (tapped hole facing out) and
install retaining clip.
SEPARATOR PLATE
MODIFICATIONS
STEP 8. Heavy Duty and Street;
Drill holes shown as in Figure 5. Re-
move all sharp burrs from plate sur-
face with a fine flat file. Burrs can be
4
#2
#5
#6
#1 orange
check ball
Note: #2 through #8 check balls are
black rubber.
#7 checkball is not used.
Boost valve
Pressure regula-
tor valve
Retainer
Retaining
clip
Figure 4
Converter relief valve,
long stem (green or
blue spring)
Replace stock outer pres-
sure regulator spring with
red spring in kit. See step 5.
1-2 Capacity modulator
valve. Located in first
bore on this end of valve
body.
Bore plug
(tapped hole
faces out)
Replace stock spring
with spring from kit.
See steps 6 or 7
#8
#4
#3
Pay close attention to component
location and orientation when
removing valve trains from bores.
removed from around the edge of the
holes by lightly pressing a slightly
larger drill bit to the hole and spinning
it with your fingers. Wash and wipe
any loose chips from theseparator
plate.
IMPORTANT: Drill only the holes in-
dicated. Replacement AOD separa-
tor plates are NOT available from
Ford, so be very careful not to
mislocate any of the holes. If you
should damage your separator plate
you will have to find a complete used
valve body of same year and model at
a junk yard or transmission shop (least
expensive) or purchase a new valve
body from Ford. Alternatetively, you
can purchase a B&M universal AOD
separator plate which can be modi-
fied to fit any model year AOD trans-
mission.
VALVE BODY ASSEMBLY
STEP 9. Check ball placement (See
Fig. 4) Place check balls in the valve
body in the positions shown. Use a
dab of grease or petroleum jelly to
Short stem TV pres-
sure relief valve
(green spring)
Retaining clip
groove
Inner pressure
regulator spring
Retaining
clip
Boost valve
sleeve
Retaining clip
groove