B&M 70360 SHIFT IMPROVER KIT - Manual (Page 2)

2
Special Instructions
Metric tools are required to
disassemble and assemble the
4L60E, see tool list at rear of this
booklet. Choose a clean, dirt and dust
free place to work on your 4L60E. Dirt,
loose threads from rags and pieces of
old gaskets can become lodged in
valve bores and/or separator plate
orifices and cause the transmission
to malfunction. If you do not have a
solvent cleaning setup available, get
several cans of WD40 to clean your
parts.
Warning: Almost all cleaning solvents
pose a threat of fumes and or fire.
Make sure to use cleaning solvents
only in a well ventilated location away
from any source of ignition such as
open flames, sparks, hot water
heaters, etc.
Be careful with the internal and
external wiring harness. Wiring and/
or connectors are easily damaged and
difficult to troubleshoot if they are
damaged.
VERY IMPORTANT
Use petroleum jelly to hold checkballs
and gaskets in place during
installation. DO NOT use any kind of
wheel bearing grease to hold
checkballs in place, these greases do
not melt or mix readily with ATF and
can block shift and pressure conrol
solenoid feed circuit filters and orifices.
Causing erratic shifts and potentially
serious transmission damage
because of low line pressure.
Cautions about PCM.
The MIL (Malfunction Indicator Light
or Check Engine Light) may be
illuminated (turned ON) if the vehicle
is started and any of the transmission
electrical connectors are
disconnected or has wires that are
broken or, have been pinched and/or
shorted. The MIL is programmed to
illuminate whenever a system (engine
or transmission) component
malfunctions and at the same time a
DTC (Diagnostic Trouble Code) is set
in the PCM. You may have to refer to
your owners manual, a GM service
manual or visit a GM dealer to
determine the source of the
malfunction(s) that cause(d) any DTC
codes to be set and the required
remedy. Make sure your engine is in
good tune and any problems related
to set trouble codes are repaired
BEFORE attempting to install your
B&M Shift Improver Kit.
Do Not attempt to jumper the Data
Link connector to read a DTC from the
PCM in 1993 / 1995 vehicles until you
have checked your owners manual, or
GM service manual, or verified with
your GM dealer that the particular
PCM in your vehicle allows jumpering
the data link. Jumpering the data link
connector to read DTC’s is not
possible on any 1996 or later OBD II
vehicle and can damage the PCM and
result in a very expensive repair bill.
Except for some 1993 to 1995 PCM’s
all others will require the use of a
diagnostic scanner to read. Some
DTC codes are “hard codes” and may
require a diagnostic scanner to turn
them off after the malfunction, which
set the DTC, has been repaired.
If electrical power to the transmission
is cut or the PCM fails the 4L60E will
operate in “limp home” mode, if this
happens, you will only have Reverse
and Drive 2 range availble.
TRANSMISSION OIL COOLER. We
feel that it is very important that every
vehicle used in heavy duty or high
performance application should have
an auxiliary oil cooler. Excessive heat
is the primary cause of transmission
failures, an and auxiliary oil cooler is
an inexpensive safeguard against
overheating and failure. B&M offers a
wide range of transmission coolers to
suit every need and are available at
your B&M dealer.
DRAIN PLUG KIT 80250. 4L60E
transmission oil pans do not come
from the factory equipped with drain
plugs. The B&M Drain plug kit is
inexpensive and easy to install. It
eliminates the mess when changing
fluid or on pan removal.
TEMPERATURE GAUGE KIT 80212.
Most transmission and converter
failures can be traced directly to
excessive heat. The B&M
transmission temperature gauge can
save you a costly repair bill by warning
you of an overheated transmission.
The B&M temperature gauge comes
with all necessary hardware and is
easy to install.
Preparation
Automatic transmissions operate at
temperatures in the range of 150 and
250 Fahrenheit. We recommend the
vehicle be allowed to cool for
several hours before disassembly to
avoid burns from hot oil and parts.
Transmission ID Pad
4 JY D XXXX
Year Model Model designator D=4L60E