B&M 70239 SHIFT IMPROVER KIT User Manual

Page 3

along with several pints of oil. Have
your drain pan ready to catch the oil
and check balls (should they fall
out.) Save all check balls in a safe
place where they won’t get lost.
STEP 5. Beginning mid 1987 model
year, TH-700’s have an auxiliary
valve body located where earlier
models have a cover plate (See
Fig. 2.) Remove the cover plate or
auxiliary valve body. Be careful not
to drop the check ball located in the
auxiliary valve body (See Fig's. 8,
8a, 8b,& 8c) Remove the 1-2 accu-
mulator housing while holding the
separator plate up to the case. Then
slowly lower the separator plate
and retrieve the check balls located
above the plate. Make note of the
color and location of the 1-2 and
2-3 accumulator springs for correct
reassembly (See Fig. 10.) Remove
all old gasket material from these
parts. Note: Early 1982 TH-700’s
had a support plate located un-
der the 1-2 accumulator hous-
ing. If your transmission is fitted
with this plate, carefully save the
gasket as you will have to re-use
the gasket upon reassembly (Gas-
ket GM P/N 8642129 is not in-
cluded in kit.)

Figure 2

Selector lever

detent spring

Filter retaining

spring

Throttle valve

linkage

Electrical

connector

Auxiliary valve

body

1-2 accumulator

housing

Servo Vent

Do not block this

hole

Torque converter

clutch solenoid

Crossover

tube