B&M 117302 4L60E TRANSMISSION - Manual

The B&M TH-700R4 is a specially modified transmission
intended for performance and heavy duty applications. It
is suitable for use behind engines producing up to 450 lb-
ft of torque. This covers most small block Chevrolets and
mild big blocks.
1982-85 and some 1986-87 TH-700’s controlled the Torque
Converter Clutch (TCC) with hydraulic valves located in
the valve body. In most 1986 and later TH-700’s the TCC
shift valve was plugged and TCC is controlled by an Elec-
tronic Control Module (ECM). ALL B&M TH-700 (4L60)
TRANSMISSIONS ARE BUILT FOR ECM CONTROL OF
THE TCC. If you are replacing a 1982-87 transmission
with hydraulic TCC control you will have to do one of the
following: Swap valve bodies from your original transmis-
sion to he new one or, purchase an electronic TCC control
(B&M P/N 70244). For installation into vehicles not origi-
nally equipped with a TH-700, see Section 2 for instruc-
tions on how to control the Torque Converter Lockup clutch.
A lockup torque converter is desirable but not required
with this transmission. To prevent the transmission from
overheating adequate oil cooling is required especially if
running an open (non-lockup) converter. If you are install-
ing a non-lockup torque converter you must also discon-
nect the TCC Solenoid to maintain proper oil flow in the
converter (refer to instructions accompanying the non-
lockup converter). The torque converter for this transmis-
sion must have a 30 tooth spline turbine hub. B&M offers
a complete line of converters for a wide range of perfor-
mance and towing applications. See the B&M catalog for
the latest offerings including the Tork Master and Holeshot
torque converters.
The TH-700 (4L60) transmission does not use a vacuum
modulator like some GM transmissions. Instead it uses a
Throttle Valve (TV) linkage mechanism to control line pres- sure. It is essential that the TV cable be attached to the
carburetor or throttle body and properly adjusted. If the
cable is not connected correctly, the transmission will not
shift correctly and it may fail. See Section 3 for instruc-
tions on connecting the TV cable in vehicles not originally
equipped with a TH-700.
1. TRANSMlSSlON INSTALLATION
STEP 1: Assemble torque converter to transmission. Lu-
bricate the torque converter pump drive hub with clean
transmission fluid before installation.
STEP 2: The engine block’s transmission mounting face
must be free of any dirt or burrs. Make sure both dowel
pins are Installed and stick out of the block approximately
1/2” to insure proper transmission alignment.
STEP 3: Remove and inspect the flexplate for distortion,
cracks or damaged ring gear teeth. If the flexplate shows
any damage it should be replaced. Do not attempt to re-
pair a damaged flexplate.
STEP 4: Assemble the flexplate to crankshaft and align
all holes before installing the bolts. When properly installed
the raised inner lip on the flexplate should face away from
the crankshaft flange. Torque the bolts to 81 Nm (60 ft.lbs.).
STEP 5: Place the transmission in position on transmis-
sion jack. Make sure the jack supports the transmission
on a wide area so the oil pan is not crushed. Install the
transmission / converter against the engine. The trans-
mission should engage the dowel pins and sit flat against
the block with hand pressure only. If the transmission does
not sit flat against the engine, the converter is not fully
engaged in the transmission or some other interference
problem exists.
WARNING: Do not attempt to pull the transmission
I
nstallation Instructions
TH-700R4 (4L60) Transmission
with 30 tooth input shaft spline
Part Number
117101, 117102, 117103, 107101, 107104, 117301, & 117302
©2002, 2001, 1999, 1994 by B&M Racing and Performance Products
9500377-04 Printed in the U.S.A.