B&M 70235 TRANSPAK - Manual (Page 4)

these parts. Note: Early 1982 TH-
700’s had a support plate located
under 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 (Gasket GM P/N 8642129
is not included in kit.)
MODIFICATIONS
STEP 6. Using the supplied drills, en-
large the holes in your separator plate
as indicated in Fig. 4. Carefully deburr
the holes after drilling.
STEP 7. Rinse off valve body with
clean solvent to remove any dirt or grit.
Move to a clean working area. The valve
body consists of precision fit compo-
nents which will not tolerate dirt or
burrs.
STEP 8. Heavy Duty and Street;
MTV upshift valve (See Fig. 5.)
Remove the pin at the end of the MTV
upshift valve bore. Remove the plug,
valve and spring from the bore. Set the
spring aside (it will not be re-used.) Re-
install the valve, plug and pin in reverse
order of removal.
STEP 9. Street Only; Line bias
valve.
Compress and remove the large roll pin
retaining the line bias valve (See Fig.
5.) Take care to not distort the roll pin
more than is required to remove it.
Remove the aluminum plug, valve and
spring from bore. The spring will not be
re used. Insert the blocker rod from the
kit into the bore. Install the valve and
aluminum plug as removed. If the alu-
minum plug extends into the roll pin
hole, remove the blocker rod and grind
or file a small amount from either end of
the blocker rod until the aluminum plug
clears the roll pin hole when all parts
are installed.
STEP 10. Heavy Duty and Street;
Pressure regulator.
Remove the snap ring at the end of the
pressure regulator bore in the oil pump
assembly (See Fig. 6.) Use a screw-
driver to hold the pressure regulator
assembly while removing the retaining
ring. If the sleeves stick in the bore,
lightly rap the sleeve with a small rod
and a mallet. Remove two sleeves with
valves and the pressure regulator spring.
The pressure regulator valve may fall
out but it does not need to be removed.
4
Figure 3
Reassemble the pressure regulator
assembly using the BLUE spring from
the kit (See Fig. 7.) Use the new
retaining ring from the kit. Make sure
the retaining ring is firmly seated in its
groove when assembled. CAUTION:
The pressure regulator valve train
MUST be installed in the proper
order with the sleeves and valves
oriented in the indicated directions.
There are several ways the sleeves and valves can be installed, however, only
the orientation shown will work prop-
erly. Improper installation will cause
low line pressure, resulting in slipping
clutches and burned friction elements.
It is very important to reassemble the
pressure regulator correctly to insure
proper operation of the transmission.
Take a little extra time with this step
and work slowly. This is a precision fit
valve assembly so do not force the
Figure 4
Drill 1/8" (.125")
Drill 3/32" (.094")
Note: additional model year I.D.
1982 thru mid-87 (2) holes
mid-1987 to 1988 (2) holes
1988 and later (1) hole
Drill 1/8" (.125")
Wiring harness plug
Pry lock tab aside
to remove plug