B&M 117302 4L60E TRANSMISSION - Manual (Page 5)

E. Uses such as found in taxi or police car.
If you do not use the vehicle under any of these condi-
tions, change the fluid and filter every 50,000 miles (80,000
km). It is also a good idea to check the torque converter
bolts when servicing the transmission.
TH-700 R4 FLUID CAPACITY
Pan Removal 10.0 pints
Overhaul 23.0 pints
PRELIMINARY DIAGNOSIS PROCEDURE
1. Check and correct fluid level.
2. Check T.V. cable adjustment. It’s a good idea to read-
just the T.V. cable prior to test driving or checking line
pressures.
3. If engine performance indicates an engine tune-up is
required, this should be completed before road testing
is completed or transmission correction is attempted.
Poor engine performance can be mistaken for trans-
mission problems.
4. Check and correct vacuum lines and fittings.
5. Check and correct shifter manual linkage.
6. Install oil pressure gage and check line pressures.
Compare with values from the appropriate table.
ROAD TEST PROCEDURE
OVERDRIVE RANGE: While stopped, position the range
selector in the Overdrive position then accelerate. Check
for 1-2, 2-3, and 3-4 upshifts. (Shift points will vary with
throttle position.) Also, the converter clutch should apply
in second or third gear range depending on calibration.
(Calibration depends on the components installed in the
valve body at the factory.) Check for part throttle down-
shifts by depressing the throttle to a 3/4 open position.
Check for detent downshifts by depressing the throttle to
wide open position at various vehicle speeds.
DRIVE RANGE: At road speed in fourth gear (Overdrive
range), manually shift the transmission to the Drive range.
The transmission should downshift to 3rd gear range im-
mediately. Check for part throttle and detent downshifts.
DRIVE 2: While in 3rd gear range, shift to manual sec-
ond, the transmission should downshift immediately. Test
for a 2-1 detent downshift.
LOW RANGE: Position the selector lever in Low range
and check operation. (In some vehicles it may be pos-
sible to obtain a 1-2 upshift with selector in this gear range.)
OVERRUN BRAKING: Overrun braking can be checked
by manually shifting to a lower gear range. Engine R.P.M.’s
should increase and a braking effect should be noticed.
There is no overrun braking in Fourth (overdrive) range.
REVERSE: Position selector in the reverse position and
check reverse operation. The TCC does not engage in
Reverse.
and reverse.
The oil pressure and shift points are controlled by the
throttle opening via the Throttle Valve cable.
The transmission can be operated in any of the seven
different modes.
P Park position prevents the vehicle from rolling either
forward or backward. (For safety reasons the
parking brake should be used in addition to the Park
position.)
R Reverse position allows the vehicle to be operated in
the rearward direction.
N Neutral position allows the vehicle to be started and
operated without driving the vehicle. If necessary this
position may be selected - the engine must be restarted
with the vehicle moving.
D Overdrive position is used for all normal driving condi-
tions. It provides four gear ratios plus converter clutch
operation. Downshifts are available for safe passing by
depressing the accelerator pedal.
3 Drive position is used for city traffic, hilly terrain, and
trailer towing. It provides three forward ranges plus con-
verter clutch operation. Downshifts are available for safe
passing by depressing the accelerator pedal.
2 Manual second position is used to provide accelera-
tion and engine braking. This range may be selected at
any vehicle speed.
1 Manual Low position is used to provide maximum en-
gine braking.
SERVICE
Because of the tremendous pressures and heat devel-
oped in the TH700 in high performance applications you
should check the transmission fluid’s condition frequently.
When checking the fluid’s condition consideration should
be given to the type of service the transmission has been
subjected to. Under normal conditions the fluid will dis-
color slightly and should be changed at the recommended
service interval. Fluid that is dark in color and smells burnt
is usually the result of repeated upshifts and/ or down-
shifts under heavy load and/or wide open throttle opera-
tion. Such demanding operation will require even more
frequent oil changes to ensure reasonable transmission
life. If the fluid’s condition (color and smell) is not indica-
tive of the type of service in which the transmission has
been used then a more serious problem exists and should
be repaired.
For best performance and life of your TH-700 we recom-
mend changing both the fluid and filter every 15,000 miles
(25,00 km) if the vehicle is primarily driven under one (or
more) of the following conditions:
A. High performance applications where the vehicle is regu-
larly driven hard.
B. In heavy city traffic where the outside temperature regu-
larly reaches 90 F (32 C) or higher.
C. In hilly or mountainous terrain.
D. Frequent trailer pulling.
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