8l90 relearn procedure

Can anyone advise me if the Snap On's SW has the above mention function? I've ben asked if the tool can perform. Here is what Alldata says about it: Service Fast Learn Adapts is a procedure for 6-speed automatic transmissions in which a series of tests are run to allow the transmission control module TCM to learn individual clutch characteristics.

Once the clutch data is learned, Service Fast Learn Adapts translates it into the adaptive data cells, which the TCM uses for clutch control during shifts. The scan tool provides initiation of the Service Fast Learn Adapts procedure. This procedure is to be used following transmission repair. The Service Fast Learn Adapts procedure must be performed when one of the following repairs have been made to the vehicle. No one here has or works on a late model GM that can advise me if the function exist?

Specialty: engine, electrical, general repair, diagnostic, some hybrid, gravy jobs, turd polisher. Yes the fast learn adapt process is in there under functional tests. I've replaced several mechatronic valve bodies on the 6L80s. Thanks greasybob. Thanks again. Originally Posted by DougMontgomery. I cannot perform the above. However, I still like to give my students the best possible information.

Find all posts by Steve Joe Rappa. Hi Doug, Any scanner newer than an MT is capable of taking screen shots. They save them as. You can normally get this far without having a car plugged in. Any screens beyond this require communication with the PCM. Attached Images BMP Joe, Thanks for the capturesThere may be several harsh shifting conditions on some Silverado, Sierra, Yukon and Escalade models equipped with the 5.

The shift conditions may include:. Do not install this calibration if the vehicle is not exhibiting these conditions. It is not intended to be installed on these vehicles for any other conditions. The transmission may exhibit poor shift quality until the clutch values are learned. Performing the SFL will reset and relearn all the shift adapts.

After the programming of the TCM Fig. Refer to Bulletin NA for more information about the transmission adaptive functions, how to learn the clutches and improve shift quality. It will not allow for proper clutch learning.

The 8-Speed automatic transmission Fig. The variation from new and normal wear of the apply components within the transmission over time can cause shift time the time required to apply a clutch to be longer or shorter than desired. In order to compensate for these changes, the TCM adjusts the pressure commands to the various pressure control PC solenoids to maintain the originally calibrated shift timing.

Transmission adapts can be reset and relearned using the Transmission Service Fast Learn procedure that is completed in the service stall. When the Service Fast Learn is complete, perform a test drive and note any soft or harsh shifts. Within GDS 2, a Transmission Service Fast Learn Data page is available to aid in performing adaptive learning by showing throttle percentage, engine speed, transmission fluid temperature, and gear command.

It does not replace […].

Idle Relearn Procedures for a Chevy

GM models feature a variety of technology and new systems that may be unfamiliar to technicians and service consultants in GM dealerships. Following are several videos highlighting new features to […]. Topping Off Diesel Exhaust Fluid. Generic selectors. Exact matches only. Search in title. Search in content.We know, advertisements are annoying and slow down the internet.

Unfortunately, this is how we pay the bills and our authors. We would love for you to enjoy our content, we've worked hard on providing it. Please whitelist our site in your adblocker, refresh the page, and enjoy! The Hydra-Matic 8L90 production code M5U is a fuel-saving and electronically controlled eight-speed automatic transmission developed and produced by General Motors for use in rear- and rear-biased all-wheel-drive vehicles with a longitudinal powertrain orientation.

8l90 relearn procedure

Designed and built by GM, the 8L90 transmission speed is expected to contribute up to 5-percent greater efficiency, when compared to the previous 6L90 six-speed automatic. Smaller steps between gears, compared to the Hydra-Matic 6L90 six-speed automatic, keep the engine within the sweet spot of the rpm band, making the most of its horsepower and torque to optimize performance and efficiency.

Extensive use of aluminum and even magnesium also make it more than eight pounds 4 kg lighter than the six-speed in Corvette applications.

Along with design features that reduce friction, the 8L90 is expected to contribute up to 5-percent greater efficiency, when compared with a six-speed automatic. Five clutches are used, three at a time, leaving only two open clutches in each gear state. Optimized clutch sizing and off axis binary pump contribute to outstanding spinloss attributes. All applications feature adaptive shift controls.

Several features such as grade braking, Performance Algorithm Shifting, and Driver Shift Control are available on some of the applications. Performance Algorithm Shifting PAS monitors how assertively the driver is using engine output and other vehicle sensors to determine at what engine speed to upshift of downshift. Driver Shift Control allows the driver to shift the transmission like a clutchless manual gearbox. Electronic safeguards prevent over-revving if the wrong gear position is selected.

2016 Silverado 8L90 failure

The 8L90 uses VFS control components to monitor clutch pressures with optimum accuracy. The result are faster and more precise shifts. The torque converter is mm in diameter and features a lock-up clutch, although clutch and converter specifications vary depending on the application.

The 8L90 uses electronic controlled capacity clutch ECCC technology, which employs a small, regulated amount of slip to dampen out engine pulses for a smoother running drivetrain, especially during shifting.Modern vehicles, such as those manufactured by Chevy, work in unison with computer modules within the engine compartment.

An idle relearn procedure must be performed if a computer, or chip, is replaced in the vehicle. An idle relearn procedure is a way to reprogram the vehicle's computer memory to idle at a specified RPM, or revolutions per minute. Without the programmed idle, the vehicle can run arbitrarily, resulting in unnecessary engine wear. Chevy uses a simple idle relearn process. After you replace the computer chip, it will automatically reset itself when you turn the ignition key from the "on" position to the "off" position.

Blue Streak Electronics recommends to warm the engine after the idle relearn procedure, without use of the air conditioner. After the engine is warm, switch the air conditioning on and off, and then put the transmission into the "drive" position. These actions complete the full idle relearn procedure. It is imperative that a technician verifies that the car's battery is fully charged.

If power fails during a relearn procedure, the technician must reprogram the computer chip. This article was written by the It Still Runs team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.

To submit your questions or ideas, or to simply learn more about It Still Runs, contact us. Considerations It is imperative that a technician verifies that the car's battery is fully charged. About the Author This article was written by the It Still Runs team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.Many car makers including GM started installing fly by wire electronic throttle bodies.

A motor and gear reduction set inside the throttle body opens and closes the throttle plate to accomplish your request. It will eventually learn it on its own, but it may take over a week of driving, during which time you will experience high and low idle speeds and possibly rough idle. During that period the idle may be higher idle than normal.

During these run periods you may see a check engine light. Scan for codes and if you get throttle body related codes, clear them. Then repeat step 3 one last time.

GM 8-Speed 8L90 M5U Hydra-Matic Automatic Transmission

Unlike the cheaper Haynes and Chilton manuals that cover multiple year models, leaving the exact information you need to fix your car, these professional manuals cover your exact year, make, model.

Plus, they contain full trouble code descriptions and troubleshooting instructions. Pricing: Eautorepair. So you have to refer to the factory legends to learn the identification symbols and then refer back to circuit diagrams to find the splice and ground locations. However, Alldatadiy. If you need to dig into your doors, dash or console, Alldatadiy. Find this article useful? Share it! Tags GM throttle body relearn. Prominent words 3 minutes body relearn body relearn procedure do a gm throttle do a gm throttle body gm throttle body gm throttle body relearn home position idle idle in park idle in park for 3 let it idle in park new baseline idle park for 3 park for 3 minutes relearn procedure start the engine throttle body throttle body relearn throttle body relearn procedure.Remember Me?

What's New? Results 1 to 11 of Thread: Fast Relearn on 8L Thread Tools Show Printable Version. Fast Relearn on 8L90 Will the fast relearn work on a 8l90?

If so, what's the proper procedure? Originally Posted by dave01gt. Originally Posted by djyankees Yes, I've used it a couple times. It does help with the jerking from P to D and M.

8l90 relearn procedure

It will be updated with the status of what to do and when complete or aborted. Transmission fluid temperature must be between ? C and ? With the engine running, shift the transmission to the Drive position with the brake applied. Perform the Service Fast Learn procedure. It takes about 5 - 8 minutes with my Corvette. Turn car off for 2 minutes or more. Originally Posted by thetruck Are you saying I can initiate a fast learner with HTP?

I was under the impression that I needed a dealer tool for that. If I don't, that would make my day.The 8L90E is an 8 speed automatic transmission developed by General Motors and introduced for the Model year. It is an incredibly advanced transmission and has the technology to perform at a high level in the Corvette, while at the same time being cost effective enough to use in high volume production. The addition of two extra gears over the previous generation 6L80 was necessary to meet ever tightening Federal fuel economy laws.

Like most GM automatic transmissions that have come before it, the 8L90E has an aluminum case, overdrive, and can handle a lot of power. Through a combination of lightweight materials and wizardry, GM engineers were able to get the 8L90 to weigh in a couple of pounds less than the 6L80E, and keep it roughly the same size.

Or use this link to take you there. The 8L90 has four different gears sets and five clutches. This allows for extremely tight shifts in a relatively small space.

The 8L90 offers a true manual paddle shifting experience. And unlike the the Corvettes rivals at Porsche and Ferrari, the 8L90 also goes to work in pickup trucks. Thats a lot of range to engineer into one transmission. There are a few minor differences between the standard version and the LT1. The easiest way to determine if your vehicle is equipped with an 8L90 is to utilize the RP0 codes. They can be found in the glove compartment of the vehicle in question.

That is proof positive that the vehicle in question was at a minimum equipped with the 8L90 from the factory. Since the 8L90 has only been available for a few model years production started in for the model year. It is not utilized in many vehicles. It is only used in high performance vehicles and performance cars, otherwise the 8L45 is more than enough for the job. Max Torque is increased to lb-ft Gear ratios stay the same LT1 uses a slip yoke design LT4 uses a fixed yolk design Identifying an 8L90E The easiest way to determine if your vehicle is equipped with an 8L90 is to utilize the RP0 codes.

The Dodge Relearn Procedures

Production Years. Max Transmission Torque. Computer Control? Yes, External TCM.

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