Common issues that may cause you to believe the 1-2 or 2-3 shift solenoids are failing are a bad accumulator, stuck shift valve, just to name a few. (Gray Connector)1-35394B (21 to 31 OHM) 3-2 downshift solenoid. This is a direct replacement part, Replacement for cracked or broken lock up solenoid snout. The TCC lining also was changed, from paper to a high-carbon content lining to stand up to the extra friction and heat generated during PWM operation. The TCC PWM solenoid should be 7-20 Ohms. In essence, the TCC solenoid is like a computer controlled on and off switch for your 4l60es torque converter lock up. In the, All solenoids share common 12V line on pin. It may not display this or other websites correctly. FREE delivery Sat, Mar 25 . Measure the resistance of all solenoids. Maximum current should not exceed 1.5 AMPS. 4L60E Shift Solenoid A&B Transmission Filter Gasket kit Compatible with Cadillac-Escalade ESV EXT, Chevrolet-Blazer Camaro Avalanche Silverado Avalanche 1500, Buick-Rainier, Replace 24230298 . Here are how the solenoids are engaged in the 4 speeds: The 1-2 SS valve receives ignition voltage through circuit 1020. The TCC On/Off solenoid should be 12-28 Ohms. When vehicle operating conditions are appropriate to apply the TCC, the OEM ECU immediately decreases the duty cycle to 0 percent, then increases it to approximately 25%. MegaShift has a line pressure sensing/logging function built it. FOR SALE! If it is not, then simply replace it. One very easy way to test your shift solenoids is actually with a simple 9v battery to see if the solenoids are being activated. 20 to 40 ohms, splice in design, twist locks connectors included. There is no cleaning pulse (dither) every 10 seconds on this transmission (unlike the 4L80E). The cost associated with replacing a 4l60e TCC solenoid is not too bad, especially if youre comfortable doing it yourself. The meter should read zero or close to zero. if you do not see what you need in our ebay store please message us and we will list it for you on ebay . When assessing a shift solenoid issue, there can be a number of things to consider. Ex{|Fy!AW>j:oL'qP0V?m 9*`hs]BMYi-db3Su +XJX ]m%g6Rj_<4?lSsX3,6/sBlQqp%hfkTNgGAz_o?J4Vtf5^r)C/ I tried it and got 24 ohms at 20degrees C. Does that sound correct? T: tcc solenoid (on/off in pump) U: tcc pwm solenoid (valve body) Your Guide to a Sonnax 4L60/E Level 3 Performance Build, 245mm LU (3T40, 3L30, TH200C, 4T60-E, 4L60 & E:S-10 only) Converter, 298mm LU (TH250C, TH350C, 200-4R, 4L60 & E) Converter, Friction lining delaminating from TCC pistons (PWM and EC3). The 1995 4L60E Valve Body was produced for one year only. 137th & Metcalf. 1-35399A (3.5 to 4.66 OHM) EPC solenoid 2-35394A (9 to 14 OHM) PWM 3-2 downshift solenoids. If you want a 'mode selection switch' to force auto mode or enable manual mode, you can do this with a switch and two diodes (1N4001 or equivalent): There is an early and a late model of the 4L60E transmission. 393gwI /BFC?jn"m&&v(2NgwI dS! When using this method youll need a 9v battery and a pair of test leads. 0000009057 00000 n Under PWM control, the PCM sends a variable duty cycle to the second solenoid to control the regulated apply valve (Figure 1). 20 to 40 ohms, splice in design, twist locks connectors included. 1996: The 3-2 downshift strategy was changed to an on /off arrangement. Please verify the year, located by the Casting Stamp near the EPC Solenoid (See the Red Arrow above). 35386B 4L60E 4L80E Transmission (MLP) manual lever position switch 2004-on. To wire the 4L60E transmission to the GPIO board, you need to make a number of connections: (This circuit only works with 'Shift Button Polarity' = "active low".). Knowing how and why this happens is the key to avoiding converter failure comebacks which are the product of a modification someone else performed. It has a 12 pin case connector, extra wire in the transmission to computer harness and different computer to control the new PWM circuit. Sonnax is an industry leader in the cutting edge design, manufacture and distribution of the highest quality products to the automotive aftermarket, commercial vehicle industries, and industrial sectors utilizing drivetrain technology. I believe that this is the only way to test your solenoids on or off the vehicle. This bracket prevents the connector plug from being pushed into the pan when the external harness is connected. With some high torque or high vehicle speeds, the converter clutch is fully locked by the OEM ECU. Specification: Condition: 100% Brand New Material: Metal + Plastic Fitness: for GM Products with the 4L60E Model Automatic Transmission 2003-On Weight: Approx. 0000009213 00000 n (TCC Solenoid), 35391B 4L60E 4L65E 4L70E TCC Lockup Solenoid with Anti Bleed Valve 1996-on, 35398A 4L60E Transmission manifold pressure switch. The valves and solenoids remain (virtually) the same as with PWM operation, but the control strategy and TCC lining have again undergone changes. 4L60E 4L65E SOLENOID Kit 96-02 6pc SILVERADO SIERRA LIFETIME WARRANTY - $70.77. we are a transmission one stop transmission and transmission parts store. This is especially true if you have a cable speedometer, the cable could be binding up. Other tests can be done, but if you just own a VoltOhmeter, that should be all you would need to perform your testing. 0000012774 00000 n This modification allows full line pressure into the apply circuit, up to 140 psi under load. 2 required.No returns on installed electrical components. You are using an out of date browser. 1,031. At WOT (wide open throttle), the duty is at min (0% or off). During a 3-2 downshift, the duty is decreased and this duty is related to the vehicle speed; lower speed, lower duty. Borg Warner aftermarket in black connector, Internal sensor-bolts to the back of the pump housing. 35390 Transmission master solenoid kit 1992-95. Switching the TCC abruptly can result in a harsh apply sensation and adds unnecessary stress to driveline components. Remember that the solenoids fail under LOAD! 4L60-E '96-earlier . The main symptom of a TCC solenoid failure is the converter is not locking up. In first gear, at approximately 13 km/h (8 mph), the OEM ECU pulses the LUF (aka. 35382B 700R4 Torque converter clutch signal switch 1982-92. This adaptive control strategy can provide nuggets of diagnostic gold: as the regulator bore wears, the duty cycle required to keep slip in the appropriate range increases. What Is Convertor Lock Up In A 4l60e Transmission? A common problem with PWM and EC3 units is caused by continuous oscillation of the regulator valve, which creates bore wear over time that allows critical apply pressure to exhaust. More Information, Replacement for cracked or broken lockup solenoid snout. Luckily, it is pretty straight forward testing and replacing (if need be) 4l60e shift solenoids. USA TRANSMISSION PARTS 4l60E 4L65 Solenoid Kit 6pc (EPC A&B SHIFT 391484532439 . rockbuggy84 said: But on/off operation had some shortcomings. The image below shows the locations of various solenoids. Note that the PC solenoid takes the place of the Throttle Valve cable on earlier transmissions. Lockup Solenoid for GM 700R4 4L60E & 2004R. var menu=new menu.dd("menu"); k34326ufits 4l60e, 4l80e (9 - 14 ohms)gm solenoid, ('90-'02) 4l30e, ('93-'02) 4l60e, ('93-'03) 4l80e oem compatiable plug (3.5 - 4.66 ohms)orders are shipped out same day if ordered before 4:30pm eastern standard time! The percentage at which the PCM increases or decreases the duty cycle controls the rate at which the TCC applies and releases. 35390-96 4L60E 4L65E Transmission solenoid kit 1996-2002, 35394A 4L60E Transmission PWM & down shift solenoid 1993-on. Like it or not, modifications will always be a part of this business. How an Internal Combustion Spark-Ignition Engine Works, Setting the Cold Start and Warm-Up Enrichments, Vehicle Speed Sensor (VSS) - has its own 2-pin connector, Sol A (1-2/3-4) Switched GND (aka. %} : }yS#22r.^x3TS l#'_qa'!ca29. The rate of increase of the duty cycle controls the TCC apply rate. 0000013511 00000 n More Information, No returns on installed electrical components, 11 prong connectorNo returns on electrical components, 4L60E 4L80E Transmission wire harness repair, 4L60 4L65E Transmission wire harness repair.Repair kit for MLPS/PRNDL switch, 11 pin single connector (for 77974A NSS). The video below does a great job of showing and explaining the step by step process for testing and replacing your 4l60e TCC solenoid. Earlier transmissions won't have this solenoid, so checking it will show an open circuit. At the appropriate moment, a command from the PCM to the TCC solenoid stroked the converter clutch valve, allowing release fluid to exhaust and opening the apply circuit for business. If the solenoid works, youll hear a clicking sound when you go to attach the 2nd wire to the battery. VSS (vehicle speed sensor) on 2WD vehicles is in transmission extension housing, on 4WD vehicles the VSS is in transfer-case. The early 4L80E pressure control solenoid is PWM at 293 Hertz (same as the 4L60E). Fits '97-later PWM units. An erratic TCC lock up can be caused by an erratic input signal from the VSS (vehicle speed sensor). Duty cycle on the Pressure Control solenoid is inversely proportional to the throttle angle (as throttle angle increases, duty is decreased). 2011-07-29. With anti-drainback valve. This is the maximum clamping power available without causing the negative results associated with full line pressure to the TCC. While some people call them the 1-2 Shift and 2-3 Shift solenoids, that is actually confusing and therefore many others refer to them simply as solenoids A and B. (50k - ). B: 2-3 shift solenoid ground signal . And while fuel economy improves with TCC operation, it can be increased further with a different control process. 35380C 4L65E 4L70E Transmission turbine speed sensor 2006-ON. The TCC control solenoid was changed to a 20-31 OHM solenoid, from the previous 10-15 OHM solenoid. Next, take your test leads and connect them to the backside of the solenoid where the electrical prongs are. 1 Prong normally open switch. Sonnax is an industry leader in the cutting edge design, manufacture and distribution of the highest quality products to the automotive aftermarket, commercial vehicle industries, and industrial sectors utilizing drivetrain technology. If the mode switch is open, pushing either the upshift button or downshift button will put you in manual mode (and pushing both OR switching the mode select switch to auto will put you back in auto mode). FYI, since this is a solenoid, it doesnt matter which wire goes where. Schedule Appointment. When testing your shift solenoids, the first step is to remove the plugs going into the solenoids from the harness. None of the above categories describe me. # The Lock-Up Feel (LUF) solenoid was probably put in high end Cadillacs for seamless shifting. 4L60-E PWM Application Sample As a further effort to improve fuel economy and prolong the life of transmission and engine components, PWM control evolved into EC3. Transmission Solenoid Testing (Ohms Law) - Transmission Repair Automatic Transmission 163K subscribers 482K views 9 years ago Transmission Solenoid Testing. Max. 0000014080 00000 n While Sonnax makes every effort to ensure the accuracy of technical articles at time of publication, we assume no liability for inaccuracies or for information which may become outdated or obsolete over time. 0 % or off the vehicle speed sensor ) on 4l60e tcc solenoid ohms vehicles is in Transmission extension housing, on vehicles... 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