TCC is commanded OFF. 2. The 4L80-E transmission uses the P0741 for 3rd gear TCC slip, and P1870 for 4th gear TCC slip. Unwanted lockup also can happen by mismatching the pump plate on a 4L30-E transmission or the input shaft to converter in an early, front-wheel drive, 3-speed Toyota. The main symptom of a TCC solenoid failure is the converter is not locking up. Third Gear Starts 1. Some vehicles with a 4L80E transmission may exhibit the following problems: converter shudder, burned converters, no TCC clutch apply, and / or code 68 / 39 or P1870 / P0741. Another common problem is damaged accumulator bores. Most of the time it is a stuck Torque Converter Clutch (TCC) solenoid, but this is not the only cause of this problem. How to replace TCC Solenoid and TCC Valve in 4L80E - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. As an aid to the Some late model 4L60-E transmissions can set a P1870 or P0741 depending on how the computer is programmed. Not trying to argue, but i thought the modulated TCC started in '94. • A .030″ chamfer has been added to allow more line pressure into the TCC regulator apply circuit to prevent converter shudder. Here’s what it means: P0741: Torque Converter Clutch Circuit → Performance or Stuck Off. Often these complaints can be caused by the constant oscillation of the steel TCC regulator apply valve wearing the aluminum bore, resulting in a loss of converter apply oil pressure. 3. So I downloaded a different tune file (with the same OS) and did the 80e segment swap. DTC P0742 (TCC stuck on) is not present. The 4l60E PWM units use this material also. Only logged in customers who have purchased this product may leave a review. TCC slip indicates TCC is ON. Quad driver module failure. • Inhibiting TCC. Fig. When my tranny was acting up in my '93 a couple of years ago i took the tranny out and swapped it with a '95 4L80E. No Torque Converter Clutch (TCC) Sol. No TCC Stuck ON DTC P0742. This is a replacement TCC regulator. This is the General Details 1991 to 2013 newer General Motors vehicles equipped with 4L80E and 4L85E automatic transmissions often wear out the torque converter clutch (TCC) regulator valve bore in the valve body. No 3-2 SS Valve Assy. Year Range 1990-2011. Sys Volts > 8.0 & < 18.0 for > 0.5 sec ; No ISS DTC's . Product Videos. DTCs provided above are generic codes that apply to 1996 and newer vehicles. or DTC P1810 (TFP valve position switch) is not present. It is the overdrive successor to the 3L80(better known as the TH400 for most of it’s life). Custom Field. PCM commands unit to second or third gears. or DTC P1860 (TCC PWM solenoid) is not present. 2. CAUSE #1: Stuck solenoid ”B". TCC System Stuck OFF . The lighter-duty spring provides a firmer lock-up, best suited for towing applications. D-4 or D-3 range is indicated. TFP valve position switch indicates D4. There is a solenoid in your GM converter that causes the the torque convertor clutch (TCC) to engage and disengage. TCC apply valve stuck. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Position Sw.) DTC P1810. Both the units have been using a High Energy Graphitic lining on the clutch plates and bands for several years now. The Gm 4l80E transmission is found in Chevrolet and GMC pick ups, G vans and commercial chassis with GVW of 8600 or greater from 1991 and up thru 2006, Isuzu NPR and NQR trucks as well as GMC/Chevrolet W3500 and W4500 trucks with either the 5.7 liter gas engine or the 6.0 liter gas engines after model year 2000 trucks. Same thing though - TCC won't lock up. Engine must be running for at least 5 seconds. COMPLAINT: No Lockup. No PSA DTC . This material is very durable and can withstand high temperatures. DTC P0785. No 2-3 SS Valve DTC P0758. QUICK TEST: Remove solenoid “B”, reinstall pan. P0741 ; This DTC detects excessive torque converter slip when the TCC is commanded ON in 2nd and/or 3rd Gear Only. You can see in Channel 1 that the TCC solenoid has been pulled to ground. To help center the valve spool has annular grooves to help center the valve pressure. Troubleshooting the 4L80E is said to be a touch weak and prone to snapping when you shift with TCC. To engage and disengage 4L80E uses the PWM type strategy and uses a Graphite/ composition. Significantly larger than the 4L60E and if you compare the cases side by side it makes the smaller look. N'T lock up there are a number of obvious signs reinstall pan original and the.! Not released I did it a 3rd time, and P1870 for gear! 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