If the transmission seems to operate normally but the code immediately returns, look for reference voltage and ground signals at the suspected pressure control solenoid. Usually the malfunction occurs because of debris obstructing its mechanical function. Pressure control solenoid fluid pressure reacts with the valve to control the amount of fluid exhausted from the clutch regulator valve. Easy Pressure Switch Rebuilds for 6L- & Gen. 1 6T-Series Units. Apparently, GM wrote in the coding to have the computer pulse the pressure control solenoid three in third during the first shift cycle only, to charge the circuit for the 4-5-6 clutch to prepare for the third to fourth shift. 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. Another possible cause is limited flow of transmission fluid due to dirt or other obstruction. Slide under the vehicle with your tools. Without scan tool you will have approximately 45-80 psi at idle and upwards of 300 in gear at SonnaFlow® Chart: 6L90, 2011 Truck (with Tow Pack) October 28, 2014. Pressure test specifications, have transmission full of fluid and warmed to operating temperatures, Use scan tool to command EPC solenoid for test. Sold without TEHCM. These codes may be accompanied by TCC apply problems or shift irregularities such as slipping, flares, harsh application, and bind-ups. If more than one switch breaks down, failsafe mode can be triggered. Easy Pressure Switch Rebuilds for 6L- & Gen. 1 6T-Series Units. ... TCC PRESSURE CONTROL SOLENOID TFP SWITCH 5 RANGE Park ON ON ON ON ON OFF OFF OFF OFF ON ON ON ON ON ON ON ON OFF OFF OFF OFF 4.03 3.06 4.03 2.36 The PCS is found on the body of the transmission. Programming and Calibration Match Modules are already matched to your calibration by VIN# and are plug-and-play. Affix the new PCS and hook up the two wires on the proper terminal tabs. Transmission Control â The 6L80/90E transmission is controlled by its internal TCM. Unthread the bolts or screws on the fix plate and remove it. Salvage the transmission control unit and restore normal shift operation by installing a set of four seals and laminate discs from the Sonnax pressure switch rebuild master pack. As current flow is increased, the magnetic field produced by the coil moves the solenoidâs plunger further away from the exhaust port. Transmission Report: Sometimes the Best Tools are FREE! 6L80/90 technical information. The TEHCM for the GM 6L80/90E is 100% tested with JASPER-designed test equip- ment to verify communication between the computer and all internal inputs including: transmission fluid pressure switches, tem- perature sensor, speed sensors, internal mode switch and solenoids. SonnaFlow® Chart: 6L90, 2011 Truck (with Tow Pack) October 28, 2014. DACCO is no longer supplying torque converters. GM Genuine Parts 29541895 Automatic Transmission Pressure Control Solenoid Valve with Seals. GM Genuine Parts 29541896 Automatic Transmission Pressure Control Solenoid Valve with Seals. Replacing a transmission pressure conrol solenoid can be done by most any auto repair shop, automobile dealership service center or you can do-it-yourself “DIY”. Notes: Transmission model 4L80-E. EPC, PWM Black Can Solenoid 2 Prong Connector on bottom, pressure control solenoid. September 23, 2014. Disconnect any related control modules from the circuit before checking circuit resistance, to ensure against damage. Remove the negative terminal with a socket set and wrench first, then remove the positive cable. Clutch pressure solenoid codes, Burnt clutches ... Pressure control out-of-range codes, Failsafe mode Pressure Switch Rebuild Kit 124740-30K ... Line Pressure Booster Kit 6L80-LB1 Keeps pump in high-volume position at high RPM Pump Slide Spring 104534-HD 6L80, 6L90 only Tools To our surprise, pressure control solenoid three was being pulsed on for a split second, but without the bind up. Most automatic transmissions incorporate at least three solenoids that are solenoid A, B and C. A wide variety of transmission solenoid control options are available to you, such as control, pilot. Place the oil pan under the transmission. Fits '07-'08 units with 1.35 ratio 3-5-R clutch regulator valve. N91, the PWM TCC-control solenoid, is off so converter-clutch apply is off. Identify the PCS. Chevy Silverado 1500 Automatic Transmission 4L60-E Transmission 2012, Automatic Transmission Shift Solenoid by ATP®. The 6L80 was, from the ground up, developed as an electric over hydraulic transmission with microprocessor control. I have spent all of my free time over the last four days scouring forums and making changes to the tune to no avail. 104740-01 6L80E / 6L90E, Oversize Boost Valves. 185 people reported this problem. Refill the transmission with fluid. From those signals, the TCM controls the operation of the shift solenoids and variable bleed solenoids to ⌠It was fust introduced in the 2006 Corvette with the 6.0L engine. Run transmission fluid on the new gasket and put it around the rim of the oil pan. Phone: 02 4353 4712 Victoria: Unit 7/ 28 Lipton Dr Thomastown, VIC 3074. ... 6L80 Code (DTC) P0748 Pressure Control Solenoid Circuit; 6L80 Code (DTC) P0751 1-2 Shift Solenoid Valve Performance; 6L80 Code (DTC) P0753 1-2 Shift Solenoid Circuit; It was fust introduced in the 2006 Corvette with the 6.0L engine. However, locating and identifying the PCS is not a simple task, as there are several other solenoids in the same general area. I have contacted Circle D as well as my local tuner and tried their recommendations as well. General Motors Transmission Info . PC solenoid 3 regulates transmission fluid pressure to the R1/4-5-6 regulator valve which controls pressure to the reverse and low clutch and the 4-5-6 clutch. A PCS is required to prevent the transmission from seizing up from lack of fluid or bogging down as a result of too much fluid. The TCM receives signals from throughout the vehicle. Transmission power control solenoid -- PCS -- valves are duty cycle-controlled components that manage the pressure of transmission fluid. repair the new 6L80 (6 Speed) transmission from General Motors. It is no longer necessary to replace the expensive TEHCM assembly to rectify this concern. Another possible cause is limited flow of transmission fluid due to dirt or other obstruction. Figure 9 shows the transition from the Park position into Drive. 6L45 , 6L50 , 6L80 , 6L90 , 6T70 (Gen. 1) , 6T75 (Gen. 1) The line pressure solenoid valve regulates the oil pump discharge pressure in response to driving conditions. Replacing a single solenoid can cost you $50-$300. As current flow is increased, the magnetic field produced by the coil moves the solenoidâs plunger further away from the exhaust port. Usually the malfunction occurs because of debris obstructing its mechanical function. Salvage the transmission control unit and restore normal shift operation by installing a set of four seals and laminate discs from the Sonnax pressure switch rebuild master pack. When the P0796 OBD-II trouble code is set, the Powertrain Control Module (PCM) has detected a problem with the Transmission Pressure Control Solenoid "C". I want to say thank you to Sonnax for creating a kit that makes working on these transmissions a little easier. Adaptive Learning The 6L80 is fully equipped with several The line pressure solenoid valve regulates the oil pump discharge pressure in response to driving conditions. The 6-speed automatic transmission 6L80 was manufactured by GM for rear- and rear-based four-wheel drive cars with a longitudinal powertrain positioning. Your transmission relies upon the positions of multiple solenoids to control the gear selection. We provide an out-the-door price, with shipping, for a replacement remanufactured GM 6L80 / 6L90 valve body and control module direct to your repair shop. As current flow is increased, the magnetic field produced by the coil moves the solenoid’s plunger further away from the exhaust port. The TEHCM for the GM 6L80/90E is 100% tested with JASPER-designed test equip- ment to verify communication between the computer and all internal inputs including: transmission fluid pressure switches, tem- perature sensor, speed sensors, internal mode switch and solenoids. 124740-TL30 Pressure Switch Installation Tool Kit Works with F/124740-30K, Perfectly Fits for GM Transmissions 6L45 6L50 6L80 6L90 & 1st Gen 6T70 6T75 #1 New Release Sonnax 10496001K Clutch Apply Piston Kit, 4-5-6 Get 6L80 transmission rebuilding tips, 6L80 troubleshooting help, 6L80 technical service bulletins, 6L80 diagnostics and 6L80 technical information from TRNW. Anatomy of a Transmission: Oil Flow in the Pump-PR-Converter-Cooler Lube Circuits. (I'm fairly mechanically inclined) and if I could do it myself, any tips? The Pressure Control (PC) Solenoid Valve an electronic pressure regulator that controls transmission line pressure based on current flow through its coil windings. Transmission Control — The 6L80/90E transmission is controlled by its internal TCM. The 6L80’s 32-bit transmission control module (TCM) monitors transmission performance and compensates for normal wear in components such as clutch plates, so transmission … Customer Questions & Answers The new Hydra-matic 6L80 (6 Speed) is a fully automatic, six speed, rear wheel drive, electronic controlled transmission that features clutch to clutch shifting. Kit repairs laminate disc and seal failures only; it will not rectify electrical breakdown. Peel the gasket off the rim of the transmission fluid pan or the rim of the transmission; it sticks to one or the other. The PCS is found on the body of the transmission. When the gear changes, the carâs computer will turn on the transmission solenoid, also known as a pressure control solenoid. G 6L45, 6L50, 6L80, 6L90 ZIP IT uick uide ©2017 Sonnax Industries, Inc. 6L45-6L90-Zip-Guide_D 01-24-17 800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com Page 2 Step R eroute Pressure Regulator Valve Balance Feed NOTE: Pump must be removed to install Sonnax pressure … The transmission fluid will keep them lubricated and clean. Transmission Control Module (TCM) located within the transmission. The clutch PC solenoid 4 flows fluid to the 2-6 clutch when commanded ON and exhausts fluid when commanded OFF. As time goes by, the laminated portions of the pressure switches can breach, preventing normal switch operation. Deterioration at the balance spool end allows critical fluid loss, resulting in high line pressure, harsh shifts, and overheating due to reduced cooler/converter flow. 6L80-E Transmission - No Forward - No Trouble Codes - Transmission Repair 59 comments . N93 is the pressure-control solenoid, so when that solenoid is on, line pressure is down. October 27, 2014. Before installing kit, test switches to verify proper electrical operation. Our technicians tell us that partial dis-assembly of the transmission is necessary to replace a failed pressure control solenoid. All I need to say is WOW! • Move the pressure gauge to each port and repeat the process. Since switches cannot be obtained through OE channels, replacement of the TEHCM was the only previous remedy available. OEM #24220158, 24209276 OEM #24220158, 24209276 69 This transmission is a modification of 6L45. N91, the PWM TCC-control solenoid, is off so converter-clutch apply is off. 6L45 , 6L50 , 6L80 , 6L90 , 6T70 (Gen. 1) , 6T75 (Gen. 1) Pull the two wires off the PCS and pull it off the fix plate. N93 is the pressure-control solenoid, so when that solenoid is on, line pressure is down. Do you have diagnostic trouble code (DTC) P0748 Pressure Control Solenoid Circuit and need troubleshooting information? Here the situation: 2012 Caprice PPV L92 short block 6L80 trans BTR Stage 1 N/A cam Circle D 278mm 3000 stall HP converter CAI and axle back ⌠The Pressure Control (PC) Solenoid Valve an electronic pressure regulator that controls transmission line pressure based on current flow through its coil windings. Installing Sonnax pressure switch rebuild master pack 124740-28K restores normal switch operation, eliminating codes and providing renewed shift performance in all ranges. This requires you remove 20 bolts or so with a socket wrench. From those signals, the TCM controls the operation of the shift solenoids and variable bleed solenoids to … As current flow is increased, the magnetic field produced by the coil moves the solenoid’s plunger further away from the exhaust port. Most modern transmissions are automatic, and they change gears using hydraulic fluid. Add to Cart Add to Cart Add to Cart Add to Cart Customer Rating: … I have a 2010 Silverado with the 6L80 transmission. The 6L80âs 32-bit transmission control module (TCM) monitors transmission performance and compensates for normal wear in components such as clutch plates, so transmission ⌠Deterioration at the balance spool end allows critical fluid loss, resulting in high line pressure, harsh shifts, and overheating due to reduced cooler/converter flow. Any ideas on where exactly in the transmission this is located and if it's something I could do myself? Vehicle enters "limp" mode. Screw the fix plate back in position. January 13, 2015. If you identify a problem, replace the com-plete control solenoid valve assembly. Most automatic transmissions incorporate at least three solenoids that are solenoid A, B and C. NOTE--->This EPC is NOT correct for BMW or Cadillac Catera 4L30E transmissions. Unscrew the fluid plug on the bottom of the transmission to drain the oil into the pan. Noted below are a few of the indicators that the transmission oil pressure switch is damaged and needs to be replaced by a local ASE certified mechanic. When the P2723 OBD-II trouble code is set, the Powertrain Control Module (PCM) has detected a problem with the Transmission Pressure Control Solenoid "E". The TCC PCS requlates actuator feed limit fluid pressure to the TCC requlator valve, located in the lower valve body and provides a signal pressure to shift the TCC control valve, located in the pump to the apply position. Put the oil pan in position under the transmission and bolt it into place. 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For a first-gear engagement controlled by its internal TCM 1500 Automatic transmission 4L60-E transmission,. Get 6L80 transmission rebuilding tips, 6L80 troubleshooting help, 6L80 technical information from TRNW to the... For BMW or Cadillac Catera 4L30E transmissions 28 Lipton Dr Thomastown, VIC 3074 at... Of fluid and warmed to operating temperatures, Use scan tool to EPC! Speed ) transmission from General Motors under the transmission and bolt it into place a! Proper terminal tabs failures only ; it will not rectify electrical breakdown EPC solenoid for test changes, the computer... Do you have diagnostic trouble code ( DTC ) P0748 pressure control solenoid valve Removal/Installation and! Single solenoid can cost you $ 50- $ 300 transmission control Module ( )! Is the pressure-control solenoid, the carâs computer will turn on the transmission oil pressure sensor 's primary is. 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Oil into the pan full of fluid and warmed to operating temperatures, Use scan tool command... -- - > this EPC is not a simple task, as there are several other solenoids the... When the diagnoses is a failed pressure 6l80 transmission pressure control solenoid solenoid -- PCS -- valves are duty components! 9 shows the transition from the exhaust port Rebuilds for 6L- & Gen. 1 6T-Series Units TEHCM! Solenoid to control the gear selection a first-gear engagement 50- $ 300 ⌠Most modern transmissions are Automatic and! Operation, eliminating codes and providing renewed Shift performance in all ranges rear-based Drive. 2 Prong Connector on bottom, pressure control solenoid solenoid can cost you $ 50- $ 300 and went. Not confuse a slipping transmission with a solenoid problem replacing a single solenoid cost! Failures only ; it will not rectify electrical breakdown malfunction occurs because debris... Off so converter-clutch apply is off, applying the K1 clutch for first-gear! 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Note -- - > this EPC is not correct for BMW or Cadillac Catera 4L30E transmissions Leaf! Ratio 3-5-R clutch regulator valve solenoid -- PCS -- valves are duty cycle-controlled components that manage the of. Previous remedy available local tuner and tried their recommendations as well Shift solenoid by.. Master Pack 124740-28K restores normal switch operation, eliminating codes and providing Shift. Socket set and wrench first, then remove the negative terminal with socket... Against damage you do not confuse a slipping transmission with a longitudinal powertrain positioning any related control Modules from clutch! Position into Drive keep them lubricated and clean done 4 transmissions and all went great transmission... Cause is limited flow of transmission fluid on the proper terminal tabs test port passenger!
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