B&M 70239 SHIFT IMPROVER KIT - Manual (Page 8)

then purchase OEM gaskets for your
specific year and model vehicle.
STEP 13. Heavy Duty Only; Place
the 3-4 accumulator pin in the case.
Over the pin place the RED (3/8")
spacer sleeve, accumulator piston
and spring (spring is installed at step
17.) Use a dab of grease or petroleum
jelly to hold components in place
(See Fig. 10) Proceed to step 15.
STEP 14. Street Only; Place the 3-4
accumulator pin in the case (See Fig.
11). Place the BLUE (3/4") spacer and
accumulator piston over the pin, using
a dab of grease or petroleum jelly to
hold them in place.
STREET LEVEL ONLY, 1-2 and 3-4
Accumulator assembly note: With
piston and spacer(s) installed in bore
rub a straight edge on the case surface
across the accumulator bore and verify
the piston does not extend beyond the
case surface. If the straight edge con-
tacts the accumulator piston, grind or
file a small amount from the spacer
until the piston clears the straight edge.
Proceed to step 16.
STEP 15. Heavy Duty Only; Re-
move the spring and piston from the
1-2 accumulator housing (See Fig.
10.) Install over the pin the YELLOW
spacer, piston (notice orientation) and
spring. Proceed to step 17. STEP 16. Street Only; Remove the
spring and piston from the 1-2 accu-
mulator housing (See Fig. 12.) In-
stall both the BLUE and the RED
spacers over the pin, then the piston
(notice orientation.) No spring is
used for Street level performance.
STEP 17. With the 3-4 accumulator
components and case check balls in
place, place the separator plate /
gasket assembly up to the case fol-
lowed by the 1-2 accumulator hous-
ing assembly. Carefully line up the
gaskets and install three accumula-
tor housing bolts, tighten ONLY fin-
ger tight (See Fig’s. 2, 10 and 11.)
STEP 18. Install the auxiliary valve
body (with check ball in correct posi-
tion) or cover plate using the appro-
priate screws tightened ONLY finger
tight (See Fig’s. 2 and 8.)
STEP 19. Valve body installation.
Make sure check balls are in proper
locations. Position the manual valve
so the link rod can be engaged (See
Fig. 6.) The link rod must be placed
into the hole of the manual rod at a
right angle, then rotated to allow the
valve to enter the valve body bore. Do
not force the valve at any time. When
the valve is fully engaged, align the
valve body and case holes then in-
stall one bolt finger tight to hold valve
8
Figure 11 Figure 10
Separator plate gaskets Accumulator spacer placement for
Heavy Duty level
Accumulator spacer placement for
Street Level
ASSEMBLY
STEP 11. Heavy Duty and Street;
Check ball placement (See Fig. 4,
8, 8a, 8b and 8c.) Place check balls
in the valve body, auxiliary valve body
and case in the positions shown. Use
a dab of grease or petroleum jelly to
hold check balls in position. Begin-
ning mid 1984 model year TH-700’s
have a check ball which is larger than
the others in the valve body position
‘A’. If your transmission is equipped
with this check ball replace it in posi-
tion ‘A’. If your transmission does not
have this check ball then place noth-
ing in position ‘A’, pre mid 1984
transmissions were not equipped with
a check ball in this position.
STEP 12. Place the new separator
plate gaskets on the separator plate
(See Fig. 9.) Use a dab of grease or
petroleum jelly to help hold the gas-
kets to the plate. The gasket with the
‘C’ cut in it goes next to the case and
the gasket with the ‘V’ cut in it goes
next to the valve body. Make sure
no holes in the separator plate are
covered by the gasket.
If your gaskets become damaged
anytime during the installation of the
kit, replace them. If you cannot
obtain B&M replacement gaskets
Figure 9
Case side gasket
Valve body side gasket
C
V