4l80e input speed sensor location. We reserve the right to substitute carriers. May 21, 2025 · This is an input speed sensor connector for the 4L80E transmission. Turbine Speed is input sensor speed when the transmission is in 1st, 2nd, and 3rd gears. Made of high-quality aluminum, tested, durable & Dependable. . Fitment:Input and output transmission speed sensor is compatible with all G-M vehicle models with 4L80E Automatic Transmission 1991-On. You may or may not need to repin your harness. The harness has iss and vss plugs. 0 for > 0. Measures input & output shaft speed for precise shifting. 5 liter turbo diesel. The Transmission Control Module (TCM), an onboard computer, receives and processes input signals from various sensors on the vehicle and delivers output signals to the solenoids located in the control valve assembly. Both outputs or ??? I know the front VSS on a 4l80E is the ISS, input speed sensor and rear is the output speed sensor, which is the one I need to wire into speedometer. All computer-controlled engines and/or transmissions require a VSS. Replicated mode is useful for applications that require a signal with the exact pulse rate of the speed sensor being used. The vehicle speed sensor is located in the tail shaft housing on the passenger side. 5 diesel. Input. The Output Speed Sensor (TOSS) is attached to the transmission housing over the output shaft. SKU: 24203876 Positions: Rear Other Names: Speed Sensor Description: Location-Transmission. 2PCS 4L80E Input and Output Speed Sensors Compatible with 1991-up GM 4L80E Speed Sensor Automatic Transmission Replacement for 24203876 Speed Sensor 1 $2450 List: $26. Nov 25, 2020 · Doing an ls swap with psi harness on 95 k2500 suburban. 5 Input Speed Sensor - C5 4L80E/4L85E only [FONT=Arial,Arial] [FONT=Arial,Arial]- This connects to the input speed sensor (TISS) on the 4L80E transmission. Auto trans. Get a detailed diagram to help you identify and troubleshoot any issues. The speed sensors come with the o-rings and mounts installed. Detailed 4L80E transmission wiring diagram, showing the connections and components for proper installation and troubleshooting of the system. Jim Contact Me Lil Red - OBS Duramax Swap Duramax 6600 Swap Guide Transmission Output Shaft Speed (TOSS) Sensor A few different types of Transmission Output Shaft Speed (TOSS) sensors are used in the GM 4L80E / 4L60E Series. 62 Third- 1. Where is the input speed sensor located on this car? This is not the output speed sensor (VSS) which is on the passenger side of the trans-axle near the final drive. I can't find where to force it to look at VSS2 ( output shaft ) for mph so I can have accurate mph for shifts and Aug 11, 2013 · The 4L80-E makes use of three speed sensors that are used by the TCM. Jun 7, 2012 · The output speed sensor on a 2014 Ford F150 XLT is typically located on the transmission tailshaft or the rear of the transmission case. Input/Turbine Speed Sensor Your Silverado’s input/turbine speed sensor measures the speed of the input shaft. 4L70E Specs Manufacturer: General Motors Production: 1992- Present Day Type: 4 Speed Longitudinal Automatic Gear Ratios: First- 3. I’ve looked at tons of different wiring diagrams and none seem to have my colors of wires - Aug 9, 2009 · Your transmission uses two main sensors to gather information on when to shift, which is the TPS (throttle position sensor), located on the throttle body, and the input speed sensor, located on the driver side gear case about 8 inches up from the pan, to the rear of the bellhousing. This is a kit from Jags that Run. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. 8L 5. 2007-2008 has a 15 pin connector in the same location. When the transmission shifts into 4th, Turbine Speed is calculated by multiplying input speed by a calibrated value. 4L80E 4L85E TRANSMISSION INPUT or OUTPUT SPEED SENSOR AFTERMARKET FITS '91+ TPD PRO-LINE SKU: T34436 Condition: New Availability: Usually ships in 24 hours Mar 1, 2018 · The input-speed sensor circuits are identified in Figure 3 and the internal wire harness that accommodates the ISS is also shown in Figure 3. It drove fine for about 45 mins and that code popped again. Jun 4, 2014 · 2. The truck will not shift and has no speedo, in 4X4 the speedo works and transmission shifts any ideas? New 4L80E 4L85E Input And Output Turbine Speed Sensor 2 Piece Kit 1991-on. [/FONT] [/FONT] Buy GM Genuine Parts 24203876 Automatic Transmission Input and Output Speed Sensor with Seal, 1 Count (Pack of 1): Transmission Speed - Amazon. The tailshaft sensor is for vehicle speed. I would recommend checking the vehicle's service manual for a more specific Jul 1, 2017 · Got the Micro V3 4l80e drop in harness, it replaced a working controller just shifted to MS3 ultimate. Apr 26, 2020 · The other sensor is the output shaft speed (OSS) sensor. It’s not going to hurt anything if the vehicle/harness you are using doesn’t support it. There are two of these 4L80E speed sensors required per transmission to be used as the Input or Output ISS/OSS sensor. Feb 10, 2008 · TISS - Transmission input speed sensor TCC - Torque Converter Clutch - the clutch that locks the tranny instead of passing engine torque through the torque converter. Mar 6, 2025 · The 2 speed sensors are on the driver's side of the transmission and are held in with 7 or 8 mm bolts. You need this factory harness for plug and play, or the Tcase speed sensor connector to splice in. The extra 2 pins are for the input speed sensor signal. It dont set no codes either Using an IO12 to control a 4L80E transmission is simple, proven, and the harness is straightforward enough to build using an IO12 flying lead harness. The 4L80e collects information on the appropriate time to shift using two sensors—the throttle position sensor (TPS) and the input speed sensor. The location of the ISS and how its wire harness is routed on the back of the pump cover is shown in Figure 4. Jul 24, 2013 · Got the rear end repaired! Moved to the Speedo Sensor, I noticed that there's a plug for the input sensor, but the output sensor is missing the plug for it, sensor is there but no wiring. It’s normally not very difficult to access. It's held in by one bolt and has a wire running to it. Two (2) different adapter wires are shown here. Shop now for fast shipping and easy returns! Sep 22, 2012 · The 4L80 typically has a single input speed (turbine speed) sensor and the VSS is taken from the output of the transfer case. I am using a P01 0411 PCM. 06 Second- 1. 1/2, 3/4 & 1 ton, 1996 new style, vehicle. Care should be taken when removing or installing the TCM from its mounting location. The speed sensor mounts are on the outside of the 4L80E transmission case and are very easy to replace. As shown in the diagram on the last page of these instructions, the 4L80e/85e has an additional sensor, input shaft speed sensor, that the 4L60e/65e does not have. It is used to measure the rotational speed of the transmission output shaft and send a signal to the vehicle's powertrain control module (PCM) indicating the transmission gear ratio. Sep 11, 2023 · The Input Speed Sensor (ISS) is usually located on the front of the transmission case near the input shaft. In rear wheel drive applications, the transmission needs to have 2 speed sensors – Front and rear of the transmission on a 2-wheel drive. Dec 25, 2022 · View Humvee-4L80E-Transmission_Troubleshooting. The Output Speed Sensor (OSS) is typically found on the rear of the transmission, near the output shaft. The TPS sensor, also called the output sensor, is located on the throttle body, while the input sensor is found at the gear case by the driver’s side. The trans mission will go into 4 once and then go into limp mode. Thanks. Vehicle Speed Sensor Information The vehicle speed sensor (VSS) is a crucial component for any truck, SUV or over-the-road vehicle. 7L 4 Spd RWD 4X4 Ex 4L80E/4L85E only - This connects to the input speed sensor (TISS) on the 4L80E transmission. In early 2WD 4L80's there was an output speed sensor at the back if the transmission, but this was omitted later on as the computers got better in their controls and did not need the output speed sensor. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors Condition: New Notes: Located I walk the view through electrical/electronic testing and diagnosis via a multi-meter for 4L80E transmissions while the transmission is still in the vehicle The new speed sensor plug will hook to the INPUT speed sensor, located above the shifter shaft on the side of the 4L80E. 4l85e. Oct 4, 2024 · Transmission Input Speed Sensor (TISS). Parts for 4L80E: compare prices for Overhaul Kits, Friction Kits, Bushings, Bearing, Solenoid Kits, Valve body, Torque converters, Planetary Gear kits, Filters 4L80E Input and Output Speed Sensors Set of 2 All years 1991-up Vehicle Speed Sensor APPLICATIONS Hummer H1 1993-2005 V8 Gas 6. Axle Ratio = Allows you to input your axle ratio, which improves speed display accuracy in the home screen and will also will affect speed sensor calibration for certain types of speed sensors. The ISS is not used for any calculations in the ECU, just for monitoring purposes. OEM fit, reliability, and accuracy. The issue I am having is under the selections for speed sensor there is only Bss1 for MPH. 4L80E 4L85E INPUT & OUTPUT SPEED SENSOR SET 2-PIECE AC-DELCO 24203876 FITS '91+ When swapping a 4L60E transmission harness from a 1998 Tahoe into a 1997 Chevy 2500 with a 4L80E, the input speed sensor (ISS) wiring differs. and there by changes with stall. This switch (and its circuit) eliminates the need to use a transmission out-put speed sensor and a transfer case speed sensor to determine when the vehicle was placed in 4WD LOW range as on 1991-93 vehicles. In applications where a 4L80e/85e is to be used, follow this Jan 7, 2021 · So what are the 2 wires for the VSS exactly. Easy Installation: Automatic transmission input output speed sensors are designed for easy installation, plug-and-play, no modifications or special tools required. Upgrade your vehicle's performance with this top-notch component now! GTP ships this 4L80E transmission speed sensor kit to you fast. Explore a wide range of our 4l80e Speed Sensor selection. If you have a P0717 Input/Turbine Speed Sensor Circuit No Signal trouble code, this post will help you understand what it is and how to fix it. Oct 13, 2022 · On the 4L60E transmission (4 speed) the input speed sensor is located in the pump stator housing, see pictures below. Inner shaft speed "A" circuit no signal. For more information, make sure to subscribe to this channel, visit our To do this, it relies on an electromagnetic sensor called a input/turbine speed sensor / turbine speed sensor / TSS, which is typically located on the transmission case near the bell housing. 3L 5. In the replicated speed sensor output mode, the speedometer output provides an amplified and squared version of the original speed sensor signal. 4L80E only - This connects to the input speed sensor (TISS) on the 4L80E transmission. 0L V8 with piston slap feature :? ~60K miles Issue: Loss of VSS signal - generates P0502 and C0236 codes, speedometer inoperative Initially made the assumption that the VSS sensor had failed. 2d 4l80e for the low mile rebuilt 4l80e and stand alone harness/transmission controller. The transmission connector is located on the passenger side of the 4L60E transmission housing and on the driver side of the 4L80E transmission housing. It does this by using a reluctor wheel and magnets (magnets go on the sensor tip) The reluctor wheel will have notches cut into it. Oct 8, 2020 · COMPLAINT: Sometimes after transmission repairs, the vehicle returns with the diagnostic trouble code P0716 for Input Speed Sensor Performance or P0717 for Low Input Speed Sensor Circuit Voltage. These are genuine GM speed sensors for the 4L80E Input and Output (VSS) speeds. I understand that the iss is the front sensor, isn’t it? But there’s no rear sensor on the tranny. May 15, 2015 · Sensor is located on the driver's side of the transmission immediately behind the bell-shaped portion of the housing. Need a replacement transmission? TCC Slip is between -15 RPM and +15 RPM Engine running > 400 RPM > 7. 50 Don’t worry about the input shaft speed sensor. I hacked in to the harness I can go through all 4 gears by Aug 4, 2020 · The input speed sensor is on the left side of the transmission about in the middle, the output speed sensor is on the tail of the transfer case. Jun 25, 2011 · The other wiring is for the Input Speed Sensor (ISS) located on the side, towards the front of the 4L80E transmission. Aug 23, 2024 · Buy Amrxuts 2Pcs 4l80e Transmission Input Output Speed Sensor for Chevro-let for GMC 1991-On 8661628, 8683265, 8685042, 24203876: Transmission Speed - Amazon. The DIY cost for replacing a speed sensor is the cost of the sensor Nov 10, 2023 · I recently had the shift solenoids, transmission filter,outter and inner speed sensors replaced on a 4L60E transmission to clear the P0717. Working on my 4l80e in my 92 chevy pickup with the 6. Jun 24, 2025 · When I first came across the 2Pcs Transmission Input and Output Speed Sensor set designed for GM 4L80E transmissions from 1991 and onward, I was immediately drawn to its promise of precision and reliability. I'm at a loss the only thing I haven't replaced Jan 3, 2021 · So, some 4L80e units have the input shaft and output shaft speed sensor on the transmission units themselves. 2. 0 sec Sys Volts > 8. Express, savana. com FREE DELIVERY possible on eligible purchases How to locate and replace the input and output speed sensors on a 6l80 6l90 and 6l45 6 speed Transmission Chevrolet Silverado GMC Seirra this video shows the location of the input and output speed After an OBD II scan you learn that your input or output vehicle speed sensor (VSS) has malfunctioned and needs to be replaced. Package list: 2Pcs New transmission output speed sensor. Unrelated but how are you adapting your 4L80E's output shaft (32 spline) to work with your 4L60E's transfer case input which is 27 spline? Take a look at our new tech video highlighting the 4L60E input speed sensor and other tips to help you at the workbench. TCM Location PagePage 9 4 ATION Troubleshooting the 4L80E Automatic Transmission Transmission Control Module (TCM). Figure 4. Transmission Input Speed Sensor (TISS). It uses the Input Speed Sensor to monitor input speeds to compare against engine speed and output Shaft Sensor speed, using this data to adjust shift speeds under instantly detectable conditions. Plug the connector into the ISS and then route the two wires to the PCM. 5 sec Product Description New high quality 4L80E speed sensor that fits in 1991 and up model transmissions. Please can you help me. I rebuild the tranny,now the speedometer wont register on the test drive. Apr 15, 2019 · The 4L80E needs to have an electronically controlled speed sensor, for the 4L80E transmission controller to work properly. For 4L80E applications, you will need to add the input shaft speed sensor connector to the correct output shaft speed sensor harness. It consists of a toothed reluctor wheel that turns with the output shaft, and a magnetic pickup coil that produces an AC signal as the teeth on the reluctor wheel pass by. This is located on the passenger side of the trans with a vertical connection (trans connector goes down into the plug), as well as a single 2 wire vehicle speed sensor (VSS). If you are unsure or don't know, please contact us and we will solve your problem. We are TSC Specialties LLC. The 4L80E ISS signal must connect to the PCM pin designated for the 4L80E input speed sensor, often separate from the 4L60E location. 5,2 wh drive. The Vehicle Speed Sensor (VSS) is a magnetic pick-up that sends a signal to the Powertrain Control Module (PCM). Based on my research for my 2006 silverado, the ISS sensor wires I am to install into the PCM are to I tested the 4L80E transmission speed sensor and was blown away by its accuracy and durability. Brake Switch (Gray) – Wired to the brake light switch. Mechanical speedometer tail-shaft conversions can be used in older vehicles. In conjunction with the VSS circuit changes, all 2994-95 4L80E 4WD applications have added an additional switch as an input to the PCM. In this video we install an aftermarket Vehicle Speed Sensor in our 4L60E. 4L80E Speed Sensor Replacement. 1L 4 Spd RWD 4X4 Express, Savana, 2500-3500 1996-2009 V8 4. Insert the input shaft speed sensor harness pins into the TSS connector shell according to the above illustration. Where is the engine control sensor on a front wheel drive car? This sensor is found on one end of the camshaft, usually on the right side in a front wheel drive car. On the non 4 wheel ABS trucks, those two sensors give information to the speed sensor buffer behind the glove box which made your speedometer, cruise, rear ABS, and transmission shift correctly. Speed sensors information. So where does the vss plug go? New 4L80E - 4L85E Rostra / Delphi Input / Output Turbine Speed Sensor Connector Repair Kit (Pigtail) 1991-2009. Note that a 4L70E has one internally wired, but is not connected to the HEFI harness. These are obviously the 4x4 4L80s only. They are the same between the input and output speed sensors. Sep 19, 2015 · I bought the 4L60e to 4L80e adapter harness and ISS sensor harness from Nelson and the instructions for the 1999-2007 classic mention a RED connector. 0 & < 18. 3L 4 Spd RWD AWD Avalanche 2001-2003 V8 8. On the PCM RED connector, the red wire goes into position 22, while the blue goes into position 23. Now, you will need to go to the PCM connectors, and re-purpose the WHITE and TAN/BLACK wires for the input speed sensor. You can take your car to the repair shop or dealership and spend between $100 and $250 or more to have one speed sensor replaced or you can replace the sensor yourself for a fraction of the cost. pdf from FOR M998 at University of Florida. I replaced the input speed sensor no help replaced the output speed sensor again no help. Dec 13, 2021 · P0717 Definition: Input/Turbine Speed Sensor – “A” Circuit No Signal Here is the meaning of P0717 broken down by its two main parts. Sep 19, 2024 · About this item Replacement: 4L80E 24203876. com FREE DELIVERY possible on eligible purchases May 7, 2020 · Input Shaft Speed (ISS) Sensor – The 4L60E does not have an ISS. SYMPTOMS OF A BAD INPUT SPEED OR TURBINE SPEED SENSOR In this video we show you the location of the input speed sensor on the Chevrolet Silverado 2006 2007 2008 2009 Feb 24, 2023 · About this item Part number: 4L80E 24203876 Replacement part for your GM 4L80E transmission . TRANSMISSION FIXED? 1976 Ford F250 Highboy FOUND ABANDONED In Barn For 18 YEARS! | Amazing Detailing Restoration! Mar 11, 2015 · Can anyone confirm how many teeth there are on the reluctor ring used for the input shaft speed sensor? We've assumed it was 40 just like the output shaft sensor, but reviewing a customer's datalog today I'm pretty convinced that it is 31 ?! Oct 5, 2022 · Buy 2PCS 4L80E Input and Output Speed Sensors 2-Piece Set 1991-up Compatible with GM: Transmission Speed - Amazon. This Listing Is For (1) One Kit That Comes With: (1) New Top Quality Connector Repair Kit (Pigtail) (2) New Crimp Connections. All models. Speed Sensing The 4L80E transmission may feature two speed sensors, one for turbine input speed and one for output speed. Other 4L80e units only have the input shaft speed sensors and rely on the transfer case for the output speed sensor. Hi to all I would like to know if it is possible to disable the input speed sensor on a 4L80E to stop it going into limp mode. Output. Great informational articles re Jul 6, 2014 · Having trouble figuring out the sensor connections on my 4l80e. Find top brands, exclusive offers, and unbeatable prices on eBay. It is stuck in limp mode. Feb 8, 2024 · How to troubleshoot transmission Neutral state and codes caused by TSS, ISSA2, ISSAB and OSS problems. If there’s no signal coming from the transmission TSS sensor, then a P0717 DTC will be stored. To access this sensor the transmission requires a strip down. 4l80e. Nov 15, 2009 · This should maybe have been posted in the tranny section,but traffic seems rather slow there. Are both in and output speed sensors the same on a 4L80? This is on a 92 GMC 6. In both cases, one side of the adapter wires plugs into the TOSS sensor; the other plugs into the COMPUSHIFT II wiring harness. As the input Jan 2, 2025 · 2Pcs Transmission Input and Output Speed Sensor Fit for G-M 4L80E 1991-Up Replace 24203876, Automatic Transmission Speed Sensors with Seal Mar 24, 2010 · On 4wd 4l80e rigs there was a factory jumper harness that plugged into the main harness and went back to the tcase. Auto Trans Revolution Sensor. OEM Part A sensor that rarely ever fails, but if it your vehicle is equipped with one of these and does fail expect the speedometer to fluctuate and the transmission to shift erratically. This device (Figure 9) contains a permanent magnet surrounded by a coil of wire producing a magnetic field which is interrupted by rotor teeth cut into the outside diameter of the forward clutch housing (Figure 10). Codes 85 and 87 undefined ratio error. United States Army Ordnance Mechanical Maintenance School 4L80E Transmission Troubleshooting Guide Warrant Genuine GM 24203876 speed sensor for 4L80E transmissions. 2009 and newer 4L60Es have a 17 pin transmission connector. This listing is for one sensor, two are required if you want to replace both input and output speed sensors. The VSS is a necessa Oct 24, 2014 · Subject Vehicle: GMC Quad Cab 2500HD 4x4 6. Apr 3, 2015 · You will need an Engine Speed Sensor (ESS), Throttle Position Sensor, Transmission Input Speed Sensor, Output Speed Sensor and Transmission Fluid Temperature Sensor. It is located towards the front drivers side on a 4L80E. GEN III 4L80e/85e INPUT SPEED SENSOR PIGTAIL This pigtail will allow those with a harness already setup to control a 4L60e/65e to convert to a 4L80e/85e transmission. The two on the forward half of the transmission are used to measure input and output rotational speed to help determine whether the transmission is slipping internally. Aug 16, 2023 · One thing I can think of to ask is speed sensor outputs? My specific issue is getting the stock speedometer to work in a 1992 C1500 2WD with a 700R4 when I do a LS swap with a 1999+ 4L80e. This signal is sent to the transmission control module (TCM), which uses it to determine vehicle speed. 5L Diesel 4 Spd RWD 4X4 Escalade, ESV, EXT 2006-2007 V8 4. I replace the speed sensors in the 4L80E automatic transmission in my 1992 Chevy Silverado with the 6. This Is A New 2 Piece Input And Output Speed Sensor Kit For Gm 4L80E Series Transmissions. May 3, 2024 · Learn how to identify and understand the wiring and sensor locations of the 4L80E transmission. com FREE DELIVERY possible on eligible purchases 4L80E 4L85E TRANSMISSION INPUT or OUTPUT SPEED SENSOR BY ROSTRA FITS '91+ ROSTRA SKU: 34436 Condition: New Availability: Usually ships in 24 hours Sep 19, 2017 · Bought a 1991 chevy box truck 6. (For Catalog Number: USQ4GM1 - Quick 2 Transmission Controller and wiring harness package for GM 4L80E and 4L60E transmissions) To accommodate all configurations of the GM 4L80E and 4L60E transmissions, we have included both the early-style (large) and late-style (small) output shaft speed sensor connector harnesses. Next plug in the transmission connector and the vehicle speed connector into their appropriate locations. which on a 4l80e is turbine aka input speed. The Input Speed Sensor(TISS) is attached to the transmission case over the forward clutch housing. Make sure you seal it good. When you're doing a conversion project, choosing the right VSS becomes even more vital as different engines, transmissions and transfer cases have different requirements for sensor styles and Oct 9, 2022 · Regardless, follow your instructions for 4L80 4x4 swaps - for 96, I would think they would have you use the T-case speed sensor location and the 4L80E's input speed sensor. This Is A New Input / Output Speed Sensor Connector Repair Kit For: GM 4L80E / 4L85E Transmissions 1991-2009. Measured original VSS sensor after removal and its Mar 13, 2023 · The speed sensor on a 4L60E transmission is located in the tailshaft housing, just behind the output shaft. Highest quality aftermarket transmission 4L80E electronics with the lowest prices. The 4L60E/4L65E/4L70E transmission does not use this input. That will complete the wiring changes at the transmission end. This sensor is located in the driver side of the case, towards the front. The connector with the orange gasket fits early-4L60E In the replicated speed sensor output mode, the speedometer output provides an amplified and squared version of the original speed sensor signal. 7ktqjriw0bxdo2eebxeudqlnxg8ogaqbpob55xavfxggodyw