B&M SHIFT IMPROVER KIT User Manual

SETTING UP TO INST ALL KIT

PLEASE READ INSTRUCTIONS BEFORE

Installation Instructions

Shif t Improver Kit

1993 to 2001 GM 4L60E

Part Number 70360

(see www.bmracing.com for the latest application and fitment information)

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

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. Y our 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. Af ter inst alling the B&M Shift Improver Kit the actual shift feel you get will depend on the factory PCM calibration, Automatic Transmission Fluid (A TF) 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 T rick 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.

Printed in the U.S.A.

9500583-04

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 solvent s 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.

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.

TEMPERA TURE 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.

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. Y ou may have to refer to your owners manual, a GM service manual or visit a GM dealer to

Transmission ID Pad

4 JY D XXXX

Y ear Model Model designator D=4L60E

Oil filter seal

TCC

solenoid

bore

Separator plate

support plate

1-2 accumu-

lator housing

Keep servo vent hole clear.

Avoid using sealer on pan gasket

Not all valve bodies will look exactly like the one

show above

ABCDEFG

VALVE BODY FASTENERS I D Metric sixe Inch Length Qty A M6 X 1.0 X 65 2.56 (4) B M6 X 1.0 X 54.5 2.14” (3 ) C M5 X 1.0 X 47.5 1.87” ( 9 ) D M6 X 1.0 X 18.0 0.71” ( 5 ) E M6 X 1.0 X 35.0 1.38” (4) F M8 X 1.25 X 20.0 0.79” (1) G M6 X 1,0 X 12.0 0.47” (2)

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