B&M® Shift Improver Kit™ Installation Instructions
Contents
1. Installation Instructions Shift Improver Kit 1993 to 2001 GM 4L60E Part Number 70360 2006 2005 2002 by B amp M Racing and Performance Products Thank you for choosing B amp 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 amp 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 amp M 4L60E Shiftlmprover 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 pointRPM 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 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 amp M 4L60E ShiftImprover Kit General 4L60E Information B amp M s 4L60E Shift Improver Kit was designed to provide fir2. 3 4 L x 5 16 ID BLUE Spacer 19 32 L x 1 4 ID VIOLET Spacer 3 8 L x 1 4 ID WHITE Spacer 3 32 094 Drill 1 8 125 Drill 1 2 x 1 x 2 Anvil Plate TRANSMISSION AND DRIVETRAIN
3. pin place the Spacer 3 4 Accumulator Piston and Stock Spring spring is installed at step 14 Remove the Spring and piston from the 1 2 Accumulator Housing Over the pin Install the spacer piston notice De Dei 3032 HO Level g ee Cell wer Street Drill j we F Drill 2327 HD level gy att i ore L Siren Piace Aluminum Plug SMALL EHD up on gupplied arai gr offer hard Mai surian Position Separsor piale ono plug and sirike g mhe PLUG with hamma bo pomni plug in pce orientation and spring Use petroleum jelly to hold components in place Proceed to step 14 STEP 13 Street Level Only See Figures 8 or 10 Place the 3 4 Accumulator Pin in the case Over the pin place the spacer and 3 4 Accumulator Piston using petroleum jelly to hold them in place Remove the spring and piston from the 1 2 Accumulator Housing Install both Spacers over the pin then the piston notice orientation No 1 2 or 3 4 accumulator springs are used for Street level shift performance STEP 14 Make sure the 2 4 Band Anchor has not fallen out See Fig install Solera Filler acreana on this sida Se os Street Levels Ja plik i instal Aluminum m a Pig im this Licersartic Figure 6 Separator Plate Aluminum Plug Installation 5 1993 Only Heavy Duty Level Figure 7 1993 Accumulators Heavy Duty Level Modifications 5h RED 3 8 Spacer Areo 5 8 Spacer n z 03 Aocunvulators Street Level Mod
4. through all gears Check for leaks around oil pan flange and drain plug Place selector in neutral and check the fluid level Stop engine and then lower vehicle STEP 19 Test drive vehicle and re check for leaks while transmission is hot Check fluid level again adjusting level as required Kase pura 2 4 Bang i Amta has ma fallan out i Caution Use only Petroleum Jely to hold Check Balls in place Anything else may dog Solenoid Filter Screens Figure 12 Check Ball Placement ERROR CONDITION WHERE TO LOOK FOR CAUSE High or Low Oil Pressure Oil Pump Pressure Regulator Valve Stuck P R Retainnig Ring notfully seated in groove Orifice hole in P R Boost Valve sleeve plugged Cracks in Filter Intake Tube Intake Tube Seal Damaged Wrong grease used on reassembly clogging filter Spacer Plate or Gaskets misassembled or damaged Check Balls omitted or mislocated Wrong grease used on reassembly clogging Solenoid Oil Filter Valve Body Assembly Filter Harsh Shifts Valve Body Assembly Wrong holes drilled Separator Plate or gaskets misassembled or damaged Check Balls omitted or mislocated Separator Plate or gaskets misassembled or damaged Manual Shift Lever Linkage misadjusted Damaged or missing piston seal Inconsistent Shift Points Valve Body Assembly External Linkage No or Slips in 1stGear 1 2 Accumulator No or Slipping 2 3 Shift No or Slipping 3 4 Shift No or Slipping Rev
5. P 7 Heavy Duty and Street Remove the snap ring at the end of the pressure regulator bore See Fig 3 Use a Screwdriver to push against the spring loaded Boost Valve sleeve while removing the retaining ring Remove Boost Valve Sleeve and Valve and the Pressure Regulator Spring The Pressure Regulator Valve may fall out but it does nothave to be removed Reassemble the pressure regulator assembly as shown See Fig 4 using the GREEN Pressure Regulator Spring from the kit Use the new retaining ring included with kit Important Make sure the retaining ring is fully seated in its groove when assembled If the retaining ring is not fully seated in its groove the pressure regulator assembly will blow out of its bore resulting in NO LINE pressure Modifications STEP 8 Carefully remove the snap in solenoid oil filters from the separator plate Using the supplied drills enlarge the holes in your separator plate as shown in Fig 5 Before drilling mark the hole locations and drill size on the separator plate and double check them against the illustration Make sure to use the correct drill size specified for Mianusal foe Valve Link fduet be installed aes Shaw Figure 3 Install Pressure R equilatar components in this order T D uf m iE m E a m ORIGINAL G M Damper spring a Debye BAM Supple F a k re Relaning Ring Figure 4 the performance level Heavy Duty o
6. e 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 Year Model Model designator D 4L60E Separator plate Support plate 4 1 2 accumu 4 lator housing Keep servo vent hole clear Avoid using sealer on pan gasket Notall valve bodies will look exactly like the one show above A B D E F G VALVE BODY FASTENERS ID Metric sixe Inch Length Qty M6X1 0 X65 2 56 M6 X 1 0X 54 5 2 14 M5X1 0X 47 5 1 87 M6X1 0X 18 0 0 71 M6 X 1 0 X 35 0 1 38 M8 X 1 25 X 20 0 0 79 M6 X 1 0X 12 0 0 47 QO m7m m oaOwD gt The vehicle should be raised so there is atleast 2 feet ground clearance for ease of installation and safety MAKE SURE THE VEHICLE IS RIGIDLY AND SECURELY SUP PORTED J ACK STANDS WHEEL RAMPS OR A HOIST WORK BEST DO NOT USE J ACKS ALONE Have an oil drain pan ready to catch oil and a tray on which to put Small parts so they won t get lost ltcan never be said enough Make Sure you have a clean dustfree place to work Burrs and dirtare the number one enemies of an automatic transmission Contamination in the valve body or pressure regulator valve train can result in serious transmission damage and or unpredictable operation Transmission components are precision fit wo
7. erse No TCC Apply B amp M TRANSMISSION Low Oil Pressure Valve Body Assembly Valve Body Assembly Valve Body Assembly 3 4 Accumulator Valve Body Assembly Oil Pump TCC Solenoid TOOL LIST 3 8 drive ratchet wrench 3 8 torque wrench 2 6 3 8 drive extension 8 10 13mm Sockets 8 10 13mm combination wrench 8 Plain Screwdriver Small Internal Retaining Ring Pliers Needle nose pliers Hammer Gasket scraper 3 8 Drill motor Fine cut fiat file Wetor Dry sand paper Incorrectspacer s holding piston above case surface See above Spacer Plate or gaskets misassembled or damaged Check Balls omitted or mislocated Solenoid disconnected or damaged 2 4 Band Anchor missing Spacer Plate or gaskets misassembled or damaged Solenoid disconnected or damaged Spacer Plate or gaskets misassembled or damaged Spacer Plate or gaskets misassembled or damaged Solenoid disconnected or damaged Spacer Plate or gaskets misassembled or damaged Damaged or missing piston seal Spacer Plate or gaskets misassembled or damaged P R Retaining Ring not fully seated in groove Solenoid disconnected or wiring damaged PRR PPP RPRPRPRENFF FB PARTS LIST Pan Gasket Upper Valve Body Gasket Lower Valve Body Gasket Snap in Solenoid Filters Aluminum P lug GREEN Press Regulator Spring Press Regulator Retaining Ring 3 8 x 5 16 ID RED Spacer 1 2 L x 5 16 ID GREEN Spacer 5 8 L x 5 16 ID YELLOW Spacer
8. ifications 12 With the 3 4 Accumulator components and the case check ball in place Place the Separator Plate and gasket assembly up to the case followed by the 1 2 Accumulator Housing assembly Carefully line up the gaskets and install accumulator housing and support plate Tighten bolts finger tight ONLY See Fig 2 STEP 15 Make sure Valve Body check balls are in correct locations See Fig 12 Position the manual valve so the manual valve link can be engaged See Fig 4 The manual valve link must be placed into the hole in the manual valve ata right angle to valve axis then rotated 90 degrees to allow the valve to enter the manual valve bore Do not force valve or link at any time When the valve is fully engaged align the valve body and case holes and install one bolt finger tight to hold valve body in place Refer to your sketch and notes to properly position wire harness clips and solenoid connectors Install all of the remaining bolts finger tight to finish lining up the separator plate and gaskets See Fig 2 Tighten all the valve body accumulator and support plate bolts to 11 Nm 8 Lb Ft Avoid Striped threads Do not over tighten bolts STEP 16 Double check your installation 1 make sure all bolts are installed and torqued 2 Wiring harness is properly connected 3 Regulator valve retaining ring fully Seated in groove Coatthe filter pickup tube with clean ATF then push the filter tube in
9. ll except the center valve body bolt and the 2 pressure Switch bolts marked X See Fig 2 If you do remove all five bolts from the pressure switch be sure to recover all5 switch assembly O ring seals as it is removed Hold the valve body firmly with one hand and remove the remaining bolt slowly Notice how the Manual Valve Link is engaged to the Manual Valve as you remove the valve body from case There are seven check balls in the valve body along with several pints of oil Have your drain pan ready to catch the oil and check balls should they fall out Save all the check balls in a secure place where they won t get lost STEP 5 Remove the separator plate Support plate Remove the 1 2 accumulator housing while holding the separator plate up to the case Then Slowly lower the separator plate and retrieve the check ball located above the plate Important Make a note of the color and location of the 1 2 and 2 3 accumulator springs for correct reassembly See Fig s 7 10 Remove all old gasket material from separator plate valve body and case Surfaces Pressure regulator Retaineng Riri Make Sure Ring is fully seated in Groce STEP 6 Remove pin from 3 4 accumulator piston in case Remove 3 4 accumulator piston from case bore Remove 1 2 accumulator piston from 1 2 accumulator housing Be careful notto damage piston seals or scratch piston bores while removing pistons Pressure Regulator STE
10. m 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 outracing 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 pointRPM and TCC Torque Converter Clutch lockup Speed have been preprogramed into the PCM at the factory We have designed this kitas an easy way to overcome the less desirable features of the factory calibrated imperceptible shifts With this kit you can setthe 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 amp M Shiftlmprover Kit the actual shift feel you get will depend on the factory PCM calibration Automatic Transmission F luid 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 amp M Synthetic Trick Shift Dexron III Mercon etc has a specific charac
11. r Street Remove burrs and clean the separator plate after drilling holes STEP 9 Install Aluminum Plug in Separator plate See Fig 6 With Plug installed in hole hold Separator plate parallel to anvil and strike plug squarely with a hammer Peen plug justenough so itis snug in the hole and will not fall out easily Reassembly STEP 10 Place check balls in valve body and case See Fig 12 in the positions shown Use a dab of petroleum Jelly to hold check balls in position Double check the checkball placement against the provided diagram to prevent misplacement Improper checkball placement can resultin severe transmission damage STEP 11 Snap new solenoid filters into separator plate See Fig 5 Make Sure filters are on the correct side of separator plate Place each new separator plate gasket on the separator plate and check to make Sure no holes in the separator plate are covered by the gasket Use petroleum jelly to stick gaskets to Separator plate during installation The gasket with the C cutin it goes next to the case and the gasket with the V cutin itgoes next to the valve body See Fig 11 If your gaskets become damaged anytime during the installation of the kit replace them If you can not obtain B amp M replacement gaskets then purchase OEM gaskets for your specific year and model vehicle STEP 12 Heavy Duty Level Only See Figures 7 or 9 Place the 3 4 Accumulator Pin in the case Over the
12. rk Slowly and do not force any parts This kit contains all parts necessary to obtain two different shift feel levels of performance depending on the intended use 1 Heavy Duty level Towing campers and 4 wheel drive vehicles Shift feel is firm and positive 2 Street level Dual purpose performance vehicles street and strip performance cars Street level produces the firmest shift feel Disassembly STEP 1 Position your drain pan under the transmission to catch ATF Remove oil pan by first removing rear pan bolts then work towards the front Loosen but do not remove the three front bolts If the pan sticks to the gasket insert a flat screwdriver between the pan and case and pry down gently to break pan loose Now Slowly back out the front three bolts to permit draining the ATF Remove pan gasket material from pan and case flanges STEP 2 Remove oil filter from case by gently pulling it straight down If filter is clogged or if transmission has over 50 000 miles on it the filter and filter seal should be replaced STEP 3 There are several different wiring harness configurations used on the 4L60E Before proceeding further make a sketch and some notes describing your particular unit re cording which connectors go to which solenoid See Fig 2 Notice how the connectors and wires are color coded Remove connectors from pressure switch assembly and solenoids then tie the wires up out of the way STEP 4 Remove a
13. s 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 atthe same time a DTC Diagnostic Trouble Code is set inthe 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 amp M ShiftImprover 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 J umpering 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 ver
14. teristic 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 Ill and B amp M Synthetic Trick Shift ATF s are suitable for use in your 4L60E transmission For Maximum performance and positive shift feel we recommend B amp M Synthetic Trick Shift ATF 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 dirtand 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 Almostall 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 orconnectors 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 checkball
15. to the pump bore until it is fully Seated STEP 17 Remove any old pan gasket material from pan and case pan rail Clean inside of pan with solvent You may want to installa B amp M Drain plug kit 80250 at this time Install the new Pan Gasketon the pan and align the holes Use petroleum jelly to help hold the gasketin place during installation of pan Do notuse any gasket sealer or silicone Compounds To prevent premature band failure make sure the vent hole shown in Fig 2 is notblocked or obstructed Place pan up to case 6 1994 to 02 Heavy Duty Level 1 2 Accumulaice Spring Oo not reinstall immer Spring If ores was present on oe 1 2 Accumulator Pistor ded Accumulabor Piston glial Snacar J agau mulato Fim Figure 1994t001 Accumulators Heavy Duty Level modifications all WHITE 28 Spacer ane VIOLET 1832 Spacer No Springs Required for Street Figure 10 er to 01 Accu umulators Street Level Modifications align holes and install all bolts finger tight Tighten bolts to 12 NM 9 Lb Ft Do not over tighten bolts If the bolts are over tightened the gasket will deform excessively and result in oil leaks STEP 18 Fill transmission with ATF to the full mark on dip stick You will need about 4 to 6 quarts We recommend B amp M Synthetic Trick Shift ATF for Heavy Duty and Street level applications With vehicle still off the ground start the engine and shift transmission
16. y 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 setthe DTC has been repaired If electrical power to the transmission is cutor 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 itis very important that every Transmission ID Pad 4 Y DXXXX 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 amp M offers a wide range of transmission coolers to Suit every need and are available at your B amp M dealer DRAIN PLUG KIT 80250 4L60E transmission oil pans do not come from the factory equipped with drain plugs The B amp 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 amp M transmission temperature gauge can Save you a costly repair bill by warning you of an overheated transmission The B amp M temperature gauge comes with all necessary hardwar
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