B&M 70360 SHIFT IMPROVER KIT - Manual

1
Thank you for choosing B&M, The
performance company with over 50
years experience designing and
manufacturing quality high
performance automotive driveline
components.
Before proceeding with the
installation please read all of the B&M
4L60E Shift Improver Kit installation
instructions so you will be familiar with
the series of steps required too install
this kit. We have made every effort to
include more than enough information
to assist any-one with minimum
mechanical experience to install this
kit.
The B&M 4L60E Shift Improver Kit
mechanically recalibrates your
transmission to produce firm positive
shifts, this helps reduce clutch pack
heat build up and improves
transmission durability. This kit does
not change or modify shift point RPM
in any range. All transmission shift
point RPM and pressure control
functions remain under full PCM
(Powertrain Control Module) control as
they were originally.
No recalibration kit can fix an
already ailing transmission. If your
4L60E is slipping, overheating, shifting
Installation Instructions
Shift Improver Kit
1993 to 2001 GM 4L60E
Part Number 70360
(see www.bmracing.com for the latest application and fitment information)
©2006, 2005, 2002 by B&M Racing and Performance Products
9500583-04
Printed in the U.S.A.
irregularly or making noise, you should
have it repaired before or, in
conjunction with the installation of your
B&M 4L60E Shift Improver Kit.
General 4L60E Information
B&M’s 4L60E Shift Improver Kit was
designed to provide firm positive shift
quality and improve transmission
durability in original vehicle
installations and those with moderate
engine power improvements. This kit
was not de-signed for and is not
suitable for all out racing applications.
Your 4L60E Transmission is controlled
by the (PCM) which has full control of
the 4L60E’s operation. All of the
parameters that control fluid
pressures, shift point RPM and TCC
(Torque Converter Clutch) Iockup
speed have been preprogramed into
the PCM at the factory. We
have designed this kit as an easy way
to overcome the less desirable
features of the factory calibrated
imperceptible shifts. With this kit you
can set the shifting characteristics of
your 4L60E to one of two levels of
performance, Heavy Duty or Street.
Heavy Duty level produces a solid,
noticeably firm shift when compared
to the stock shift feel. While Street
level produces a slightly quicker and
more aggressive shift compared to
Heavy Duty level. After installing the
B&M Shift Improver Kit the actual shift
feel you get will depend on the factory
PCM calibration, Automatic
Transmission Fluid (ATF) temperature
and the type of ATF you have used.
As ATF temperature increases it
becomes thinner (less viscous) which
allows the fluid to flow faster through
small orifices thereby producing faster
shift rates. In addition to the effects of
temperature, each type of ATF (B&M
Synthetic Trick Shift, Dexron III,
Mercon etc.) has a specific
characteristic friction property. This
characteristic friction property is one
of the variables that determines shift
feel and clutch torque capacity.
Dexron/Mercon type ATF’s were
formulated to produce smooth
imperceptible shifts. Both Mercon/
Dexcron III and B&M Synthetic
Trick Shift ATF’s are suitable for use
in your 4L60E transmission. For
Maximum performance and positive
shift feel we recommend B&M
Synthetic Trick Shift ATF.
PLEASE READ INSTRUCTIONS BEFORE
SETTING UP
TO
INST
ALL
KIT