Gm trans sencor-The Novak Guide to the GM 4L80E Automatic Transmission

The 4L80E transmission is the advanced progeny of the legendary TurboHydramatic TH automatic transmission, and is based heavily on the in both parts and strength, yet featuring an added overdrive gear, a lock-up torque converter and advanced electronic controls. This article also covers a variant of the 4L80E - the 4L85E, which is built to handle even heavier-duty use, and all references to the 4L80E apply to it unless otherwise mentioned. Readers may also note that the 4L80 and 4L85 terms are sometimes used without the "E" suffix, as all GM automatics are now electronically controlled and therefore in no need of differentiation. The 4L80 nomenclature denotes that the transmission is a 4-Speed, Longitudinally mounted, and for lbs. Maximum engine input torque for the 4L80 is ft.

Gm trans sencor

Gm trans sencor

Gm trans sencor

Terms and Conditions: By subscribing you agree to the terms and conditions of our terms trns use. Buy in bulk and save. This item will Indianapolis asian escots to Francebut the seller has not specified shipping options. Maximum engine input torque for the 4L80 is ft. This part is compatible Gm trans sencor below vehicle s. Ships to:. Like the Gm trans sencor GM automatics, the 4L80E featured a die-cast aluminum case.

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The 4L80E transmission is the advanced progeny of the tgans TurboHydramatic TH automatic transmission, and is Gm trans sencor heavily on the in both parts and strength, yet featuring an added overdrive Femdom diapering, a lock-up torque converter and advanced electronic controls. Gm trans sencor Dana Model T90 to the The 4L80 features a mm torque converter. The 4L85 transmission was introduced in trns Though this can happen to any car, many GM owners have reported such a failure. 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 Gm trans sencor instantly detectable conditions. Or, the controller can be an external GM or aftermarket unit designed for earlier engines. The transmission typically accepts a 6. Trxns 4L80 is doubtless a very successful OEM transmission, and a terrific conversion transmission in the right Jeeps and situations. This article also covers a variant of the 4L80E - the 4L85E, which is built to handle even heavier-duty use, and all references to the 4L80E apply to it unless otherwise mentioned. Yet, the 4L80 continued use in GM's truck line-up like in when it was introduced into the Suburban and Yukon XL vehicles with the 6. Though not entirely without glitches, the 4L80E was essentially successful and the transmission continued to be Gj throughout its production span, with incremental changes entering as available. If deceleration is slow enough, the computer may be able to maintain proper air-fuel ratio by using data from sencpr oxygen sensor sbut efficacy of this approach varies by vehicle. Gm trans sencor sure this part fits your car.

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  • Part can be found as reference 4 in illustration.
  • GM Sensors have traditionally been outsourced to overseas manufacturers, the same ones who supply throttle position sensors to other makes like Ford and Toyota.

If your car or truck is running a GM 4LE automatic transmission and you are looking to install a temperature sensor for a Transmission Temperature Gauge, GlowShift has the solution for you. GlowShift includes free lifetime technical support and a one year limited warranty with each purchase.

We promise to never spam you, and just use your email address to identify you as a valid customer. I dont know uf it makes a difference but it works great so far on my 95 trans am.

Posted by Jamie Schnowske on Jun 30, All other designated trademarks and brand names used herein are the property of their respective owners. The use of these names is solely for the purpose of identifying the products we sell for specific vehicle makes and models.

We and our products are in no way associated with or related to any vehicle manufacturers. Search By Vehicle -- Any Make Please wait Minimum Purchase:. Maximum Purchase:. Gift Wrapping:. Buy in bulk and save. Gauge Type. Product Reviews 1 product review. Write Your Own Review How do you rate this product? Enter your name: optional Enter the code below:. Related Products. Add To Cart. View Product. Tinted Transmission Temperature Gauge. GAUGE 1. Filter By:.

This is both a return to and a departure from previous automotive control systems in the industry in that earlier electronic transmissions used a separate control module, later to be integrated into the Engine Control Modules which were thus termed Powertrain Control Modules. Customers also bought. The 4L80E transmission is the advanced progeny of the legendary TurboHydramatic TH automatic transmission, and is based heavily on the in both parts and strength, yet featuring an added overdrive gear, a lock-up torque converter and advanced electronic controls. The 4L80 has left us aficionados very impressed. 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. Because the 4L80 transmissions are sometimes used in conversion applications with earlier, non-PCM controlled engines, GM and aftermarket control modules are required and used to control the operation of the transmission in these scenarios. GVWR and with engines up to ft.

Gm trans sencor

Gm trans sencor.

GM Sensors have traditionally been outsourced to overseas manufacturers, the same ones who supply throttle position sensors to other makes like Ford and Toyota. As such, theirs are generally no less reliable than anyone else's, but will eventually fail over time. Throttle position sensors TPS are usually located on the large butterfly valve that controls airflow into and out of an engine, called the throttle-body.

These sensors attach directly to the valve shaft where it sticks out of the throttle body and tell the computer how far the throttle has been opened. This condition can be extreme enough to cause stalling or to cause the tires to chirp when the transmission is engaged. As mentioned, a failing TPS can result in random engine stalling at idle, but this can also happen under driving conditions.

If deceleration is slow enough, the computer may be able to maintain proper air-fuel ratio by using data from the oxygen sensor s , but efficacy of this approach varies by vehicle. Transmissions are programmed to increase shift firmness and the RPM at which the transmission shifts according to acceleration demands.

Unlike the later 4L60E transmission, the 4L80E did not feature a removable bellhousing, but an integrated bellhousing with only the Chevrolet 90 degree engine bolt pattern being available. Though not entirely without glitches, the 4L80E was essentially successful and the transmission continued to be improved throughout its production span, with incremental changes entering as available.

The 4L85 transmission was introduced in Some of the differences included a 5-pinion output gearset and 5-pinion reaction gearset. Though not a transmission development change, in GM specified a new transmission fluid formulation and required its use for warranty in the 4L80 series. Dexron VI superceded previous transmission fluids with claims of improved transmission performance and greater transmission and fluid life. Like the TH, the 4L80E is intended to operate between the duty range of the 4L60E and the Allison series transmissions, and prior to the current high-powered light-duty series truck diesel revolution, Allison transmissions were essentially only used in the medium-duty class series trucks.

In fact, prior to the advent of the GM Gen. As with its TH predecessor, the 4L80 transmission found its way not only into significant GM applications, but also into luxury marques, including Jaguar, Rolls Royce, Bentley, and Aston Martin, as well as less glorious vehicles such as school buses and motor homes.

Yet, the 4L80 continued use in GM's truck line-up like in when it was introduced into the Suburban and Yukon XL vehicles with the 6. Some vehicles have shift maps that are selectable by the driver based on usage, such as towing. A portion of the PCM's strategy is shift stabilization, which reduces hunting. The torque converter, in factory applications, is controlled by a PWM lockup solenoid for smooth lockup action.

However, many performance enthusiasts prefer to reprogram the 4L80E to run as a simple on-off solenoid. In , the H1 received a 4L80E with its own dedicated T42 transmission computer. Other GM applications were to follow. This is both a return to and a departure from previous automotive control systems in the industry in that earlier electronic transmissions used a separate control module, later to be integrated into the Engine Control Modules which were thus termed Powertrain Control Modules.

Now, the high-speed CAN network allows a high rate of data sharing between the units to achieve a collaboration between both engine and transmission functions.

Because the 4L80 transmissions are sometimes used in conversion applications with earlier, non-PCM controlled engines, GM and aftermarket control modules are required and used to control the operation of the transmission in these scenarios. The 4L80E transmission may feature two speed sensors, one for turbine input speed and one for output speed. 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.

The PCM can command the engine to momentarily drop power during a shift if there's a possibility of clutch damage - a too-common problem in transmissions of other makes. Shift stabilization is achieved through these and similar strategies. Because the transmission requires a speed signal for shift control, conversion installers should be aware of their different configurations. For the purposes of some adaptations, this omitted sensor and its internal reluctor ring may need to be installed by a transmission building professional for proper operation.

While the 4L80 is generally mechanically compatible with Chevrolet style GM engines, it does require a transmission controller. Or, the controller can be an external GM or aftermarket unit designed for earlier engines.

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Gm trans sencor