6l80 operating temp

Getting to Know the 6L80/90E. The General Motors 6L80E and 6L90E 6-speed transmissions were introduced in the late 2005 General Motors truck line as a successor to the 4L60E and 4L80E. It features clutch-to-clutch shifting. The 6L80/90E transmission consists of five clutch sets (1234, 35R, 456, 26 and LR), a planetary set, and a low clutch ...

6l80 operating temp. 5. Reaction score. 0. 5.3l trans. temp. I would say the readings you are seeing are perfectly normal. Consider that the transmission cooler runs through the radiator. The coolant also runs through the radiator. If the coolant coming from the engine is 190-200*, it would stand to reason that the trans temps would be in that range too.

For what is worth, GM recommends a minimum 6L80E fluid temperature for continuous operation to be 150°F. Maximum is 265°F . Reactions: donjetman, swathdiver and Landonz. Jan 30, 2022 #3 ... "Normal operating temperature" is 190°-200°. Dex6 is some pretty good stuff. You don't get the "trans hot idle engine" warning until about 265°.

1 day ago · 4l60e Transmission Fluid Temperature. The 4l60e runs in the 165-200 range when fully warmed up, To combat transmission temp issues, installing an aftermarket transmission cooler is certainly helpful along with a deeper, ... 6l80 vs 6l90: Difference Between 6l80 and 6l90 Transmissions; Affiliate Disclaimer.reached or exceeded an operating temperature of 90°C (194°F). Once the TFT has reached or exceeded 90°C (194°F), then turn OFF the vehicle and allow the TFT to cool back down to 35–45°C (95–113°F) before checking the fluid level as required. Reaching or exceeding an operating temperature of 90°C (194°F)Stuffed pork chops should be baked at a temperature of 375 degrees Fahrenheit. They can be cooked at a lower or higher temp, but the cooking time needs to be adjusted to reflect th...CDT Level 2 6L80 bench rebuild includes labor & all parts itemized. Ready to ship transmission back in 3-5 business days! 5-Star Houston transmission shop. ... install a stacked plate auxiliary transmission cooler (not a tube & fin style cooler) rated for 25,000 GVW. The ideal operating temperature for this transmission is 180°or less. These ...This will likely be somewhere in the 160 to 190 degree range based on what your drive. Another thing to consider when watching your engine coolant temperature is what the engine cooling fans are set to. If you are driving slowly or stopped idling the fans keep enough air moving through your radiator to keep your engine cool.

Getting to Know More About the 6L80/6L90E. Introduced in late 2005 to become the 6-speed replacement for the 4-speed transmissions such as the 4L60E, the 6L presented several new challenges. The early release of this product line was introduced in Cadillacs and Corvettes, but before long it became mainstream for GM's light duty pickup and SUV ...6L80 oil temperature, gauge and overheating V8 and V6 Transmissions / Driveline (6L80 / 6L50 / TR6060 / AY6)802 posts · Joined 2023. #1 · May 31, 2023 (Edited) Hi All, I'm brand new here but active on other GM forums where the 6L transmissions are actively being discussed so figured I'd start a similar all-encompassing transmission thread with videos, links and other information as it relates to the 6L80/90 transmissions.Yes use the D.I.C. the other one is the on the console is the oil temp. Unless your car is different. My oil temp and water temp usually read about 200ºF. Mine also reads about 200 or higher at times.Ive had my car over ayear now and the other day I just checked for the first time and noticed.I thought it was suppose to run around 185 degrees.#automotive #mechanic #automobile Transgo 6L80 6L90 Cooler Delete https://amzn.to/3qgeMZSor Check out our amazon store for items or products used in our...The 6L80E is a robust six-speed automatic transmission commonly found in a range of vehicles, including trucks, SUVs, and sports cars. ... provide the extra power and torque needed for these tasks while ensuring that your transmission operates within safe temperature ranges. This results in more confident towing and hauling experiences. Better ...

To program a RiteTemp thermostat, first select Heat or Cool by pressing the mode switch. Then select the correct day to change that day’s temperature. Once the day is selected, pre...Jul 21, 2023 · #automotive #mechanic #automobile Transgo 6L80 6L90 Cooler Delete https://amzn.to/3qgeMZSor Check out our amazon store for items or products used in our...Trans temp is insane! Just came back from a drive, 82°F at 9pm. Fluid temp at 190°F! Just had my torque converter and other parts replaced a week ago. Ordered the thermostat kit this morning. 2016 1500 LT with the 6L80. I have a 4L60e in my 2005 Pontiac GTO that has a LS2 6.0L in it. I installed a transmission temp sensor and it operates ...We can push 215-220F towing a ~6000# trailer up and down slow hills, near max truck pay load. But with just the 2 of us, we max out at 110-110F above ambient. Now, I've heard anywhere from 225F to 250F as "stay below" temp, but have also checked thru GM lit, unsuccessfully for this.

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Jan 12, 2024 · My concern with this product, as other threads have addressed, is how cool it keeps the transmission once it has come up to temperature. It's my understanding that, as the 10L80 is equipped with an internal valve that will stay shut until the transmission comes up to about ~150F in temperature, warming up is not the concern.Transmission 6L80E (6-speed) lower fluid temp upgrade GM Truck Club Forum. 4 (70) · USD 13.7 · In stock. Description. Rudy's bundled a complete 6L80 Transmission service kit for your GM Truck and Keep your transmission operating at top notch with all the. Transmission 6L80E (6-speed) Lower Fluid Temp Upgrade GM, 41% OFF ...Following since my 2014 6L80 with 94k shift weird from 2nd to 3rd the other day ... Fluid was pretty dark, but I've never had any issues. Temp runs about 130 now with the stl-010. ... But check out part number stl-010 from superior transmission. Lowered operating Temps on my 2014 and my dads 2018 from about 200 to 130. Worth getting anyway ...6L80, 6L90 Remanufactured TEHCMs for Top-Quality, Affordable Repairs Presented by Sonnax ... Temperature sensor codes; Required. Recommended. 6L80, 6L90 Remanufactured TEHCM GM6L-TEHCM-C6. Typically fits Cadillac 2012-2015; Chevrolet 2011-2020; GMC 2011-2020; Isuzu 2012-2016.Installing a thermostat delete kit on the 2014 Silverado, if you're having trans temp issues this is the kit you need, it's cheap insurance for your transmis...Give your engine max protection and unlock extra power by maintaining proper oil temp. For a dual-purpose car, engine oil needs to be at least 220 degrees F to burn off all the deposits and ...

Codes stored are: P0872. P0877. P0889. P0990. Two of them indicate trans fluid pressure sensor c and d low, one is tfp sensor e high, and one is TCM power relay range/performance. So in summary: Before fluid/filter change trans was fine cold and flared when hot. After change trans was great for 50 miles then started hard downshifts and flares ...2 days ago · 8L90E Specs, Performance, and Identification. The 8L90E is an 8 speed automatic transmission developed by General Motors and introduced for the 2015 Model year. It is currently phasing out the 6L80/6L90 transmissions (although it hasn’t done its all the way yet. Structurally, the 8L90 is similar to the 8L45, except that it is made to handle ...Normally I wouldn't find 210 to be a problem as that was normal operating temp on my 1500, but I just want to be sure with this it's not the start of a bigger problem. ... 2009 chevy 1500 ccsb 5.3l 6l80 AFM delete TSP 220r .600/.600 112lsa cam w/ springs and hardened pushrods 4.56 gears garrett turbo with 4" exhaust. 497hp @ 9 psi BBP Custom ...Oct 6, 2008 · Utah. Jul 23, 2018. #4. The average rule of thumb for transmission temps are 100 degrees over ambient temperature-in GM half ton trucks with the six speed transmissions. This is discussed to death on the various truck forums on the Internet. BTW-the Dex 6 has been tested up to 275 degrees. Last edited: Jul 23, 2018.Reaching out for some insight on my GMT900 truck. I have a 2009 crew cab 5.3L 6L80 with 222,000 miles on it. Original transmission, fluid and filter changed every 60K or so. Currently have 40K on some Amsoil trans fluid. ... Fluid level was good when checked on a level surface in neutral at operating temp.levels. Some 6L80 applications do not utilize a dipstick. Instead a plug has been placed into the dipstick hole. The plug can be removed and the hole can be used as a fill point for transmission fluid. To check the fluid level the following procedure should be followed: ·The transmission temperature must be between 86-122 °F (30-50°C) a scanNormally, if you can stay below 200 degrees, you can expect a fairly long life. Here's a general temp chart to longevity. Keep in mind this is general. Your specific application may differ. 2010 2SS/RS Auto, Sunroof, Engine Cover. Transformer Edition package. 2013 ZL1 ragtop #5478. 1 of 54 CRT M6 'verts. Like.Differences between the 4L80E and 4L60E. The 4L80E is noticeably larger and longer than the 4L60E. This size difference means that they are not easily interchangeable. There are many cars that the 4L80E just won't fit into without modifying the transmission tunnel either by taking a large hammer to it, or by welding in a larger tunnel.6L80, 6L90 Remanufactured TEHCMs for Top-Quality, Affordable Repairs Presented by Sonnax ... Temperature sensor codes; Required. Recommended. 6L80, 6L90 Remanufactured TEHCM GM6L-TEHCM-C6. Typically fits Cadillac 2012-2015; Chevrolet 2011-2020; GMC 2011-2020; Isuzu 2012-2016.TransGo introduces their drop-in Cooler Flow Bypass Delete Kit for General Motors 6L80, 6L90 2014-on, 8L90 2016-on and Allison 2017-2019 automatic transmissions.The cooler flow bypass delete kit provides continuous cooler flow regardless of temperature and allows you to accurately check fluid level immediately after installation without having to wait or go through a warm-up cycle.

And I have never heard of moisture problems with the allisons due to cold temp operating. But truth is, the cooler an oil is, the longer it lasts. And some guys argue that our 3.0's dont get their best fuel mileage until the trans hits at least 150F.

speed, transmission fluid temperature, and gear command. To Learn C1 (For 6-7 or 3-1 Shift) 1. Pressure Learns: Note: It is recommended to utilize a road with a speed limit between of 48-72 km/h (30-45 mph) for this procedure. • Shift the transmission into 6th gear with the PRNDM in the M position. Obtain an engine speed between 1000 and 1600 ...Monitoring it further though, the transmission never warms up to the recommended 195-200F. It also had a few cases where the temp dipped to 100 on the dash (lowest number). Transmission Thermostat. On the 6L80 and 8L90 series, they introduced a thermostat to help increase the temperature to around 200 on daily driving.A relatively constant operating temperature is absolutely essential for proper emissions control, good fuel economy and performance. A 50/50 mixture of water and ethylene glycol antifreeze in the cooling system will boil at 225 degrees if the cap is open. But as long as the system is sealed and holds pressure, a radiator cap rated at 15 psi ...May 31, 2021 · This is the second part of a three part series covering the 6L80/90 torque converters and their issues and failures. In this video, I go through the interna...Temps at full operating temperature are between 196-204°F. When my fluid was 1-1.5 quarts low, temperatures were 204-210. I'm not so keen on running these 6R80's below 170°F. 2016 GT Premium 6R80 (2C), Gen3R 6-rib. 305/45/17 Street SS's - Pump E70 - 9.12 @ 149.12 (1.31 60') 100 DA. LarsSunde Member. Joined Nov 14, 20228.1. Get the transmission fluid temperature to the proper temperature outlined below. 8.2. Remove the DT-51190 fluid fill adapter and DT-45096-31 TransFlow adapter. 8.3. Install the level set plug. Tighten Tighten the plug to 9Y(80 lb in). The TCC shudder condition should be directional improved immediately after the fluid exchange procedure.cold to operating temperature drive cycles. The truck should be returned to the customer for the mileage accumulation. 5336317 Example of GDS Screen Print. Important: Obtain a single page screen print from GDS that shows the TCC shudder event. This screen print must be attached to the Repair Order hard copy for reference. A screen print can be ...Asked by Visitor in Grovetown, GA on December 19, 2020. Just got a new 6l80 put in my truck and noticed the trans temp was a little higher than the old trans. I plugged in my snap on scanner and it showed two different trans temps. One was transmission fluid temp which was about 190 which is normal. The other was TCM temp which was 201 which ...CadillacCadillac XLR, XLR-V 2006 2009 All All All 6L80 Chevrolet Caprice PPV 2011 2016 All All All 6L45, 6L80 Chevrolet Colorado 2015 2017 All All All 6L50 Chevrolet Corvette 2006 2014 All All All 6L80 ... When transmission ATF temperature is at or below 85 degrees F (30 degrees C). This 2-3 upshift flare can occur until the ATF temperature warms.The 6L90 is a heavy-duty version of the 6L80 six-speed automatic, with a strengthened input gearset that has two additional pinion gears (six in total) and a strengthened output gearset that uses ...

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6L80E/6L90E Performance Transmissions Upgrade. If you are looking to get the most of your vehicle with 6L80E /6L90E transmissions and considering a major trans upgrade, Gearstar has the best products available on the market. Our high-performance transmissions —including GM 6L80 (level 1 and 2) and GL90 — are built to the horsepower, torque ...Good design to get the fluid up to operating temp fast. When the fluid temp reaches 190F, it opens up the line to the cooler and supposedly will drop the transmission temp down. ... If you want to run your 6L80e cooler, don't get the sure cool. Get the new 158F lower temp thermal bypass valve from GM . The original one is 190F. Too hot before ...Most full-size trucks and SUVs with a 6L80, 6L90 use a JMBX full-size (300mm) style converter. It's a single-disc, non-captive clutch unit that is somewhat similar to late 300mm 4L60-E converters. When cutting the JMBX open, converter rebuilders report that a high percentage of units show extreme damage due to the clutch piston and front ...Use this procedure to check the. transmission fluid level when the. transmission fluid temperature is. between 71 °C and 93 °C (160 °F. and 200 °F). The hot check is the most accurate. method to check the fluid level. The. hot check should be performed at.Sep 19, 2023 · Better Fuel Efficiency: A well-tuned 6L80E can contribute to improved fuel efficiency. By optimizing shift points and torque converter lockup, tuning can help your vehicle operate more efficiently, potentially saving you money at the pump. Customized Performance: Transmission tuning is not a one-size-fits-all solution.when the operating range of the trans-mission fluid temperature (TFT) is be-tween 86-122°F(30-50°C). If the trans-mission fluid is outside this range the level of the transmission fluid cannot be accurately determined resulting in either an over filled or under filled trans-mission. A. Observe the TFT using the driver information center (DIC)The 6L 50 (and similar 6L 45) is a 6-speed longitudinally-mounted automatic transmission produced by General Motors.It is very similar in design to the larger GM 6L 80 and 6L 90, and is produced at GM Powertrain plants in Toledo, Ohio; Silao, Guanajuato, Mexico; and by the independent Punch Powerglide company in Strasbourg, France.Operating System Development - Operating system development is now easier through open source, Linux and Net Booting. Read about operating system development and programming. Adver...Quick Navigation GM V8 Tuning - Transmission Top. Hey Everyone, The pieces of the puzzle: E67 ECM Service# 12678513 from a 2012 CTSV auto 6l80e from a 2017 Silverado I am working on getting my swap up and running and wanted to verify my OS compatibility. I am running an E67 ECM with OS 12653238 and a TCM with OS 24276638.The optimal temperature range for transmission fluid is 175 to 220 degrees. Above that, for every 20 degrees bad things happen, starting with formation of varnish at 240 degrees, followed by seals hardening, plates slipping, seals and clutches burn out, carbon is formed, and, ultimately, failure. ….

550. E38 or E67 should work. E38 seems to be the most common. Neither will work with a cable operated throttle body. Whatever 6L80 compatible controller / platform you decide to use (Camaro / Corvette / Truck), you will also need to use the matching electric throttle body and electric gas pedal. 08-29-2014 #3.A little story to the day my transmission in my 2018 Silverado decided to heat up to 221 degrees!!!_Thanks for watching!_Please sub and help me reach 1,000 s...Note; V6 models have a transmission cooler located in the radiator, may not see dramatic difference in overall operating temperatures. Some V8 models with dual coolers also have radiator and aux coolers. Due to normal operating temps of radiator, thermal exchange may cause transmission to operate in 190-205 range This fits: Most 6L80 from 2015 ...supermatic 6l80 transmission controller kit rev 18se19 part no. 19366636 sheet 1 of 26 all information within above border to be printed exactly as shown on 8.5 x 11 white 16 pound non-bond recyclable paper. print on both sides, excluding templates. to be unitized in accordance with gmcca specifications. date revision auth dr title2017+ Super Duty - Transmission Operating Temp - Driving at 65mph, air temp in the 90's, towing about 11,000 lbs with my 6.7 F350 I am seeing what seem to me to be high transmission temperatures. Mostly 210 to 216. As much as 221 climbing grade. Flatland with no trailer I usually run about 200 on highway.Jul 15, 2019 · See a GM notice on a temperature controller for the 6 speed transmissions that should be looked at, changed if it is the higher temp. bypass valve. For the later model Tahoes, not the 21s. Thermal Bypass Valve Installation – TechLink555. 32K views 1 year ago #Suburban #Tahoe #tsb. It's no secret if you own a 2014- 2018 Chevy Silverado or GMC Sierra that they have transmission issues. One reason for this is that …A little story to the day my transmission in my 2018 Silverado decided to heat up to 221 degrees!!!_Thanks for watching!_Please sub and help me reach 1,000 s...Sep 23, 2014 · 6L80/6L90 "No Movement" After Repair. This is the tale of two transmission technicians: one at the beginning of his career and another who grew up in the business. What they have in common is …The 6L80e only got one in the 2014+ trucks and it's not like there is a rash of failures from running too cool on the prior trucks. Hell... for fun my 2017 HD doesn't have a thermostat on its 6L90e either. ... Yeah the normal running temp isn't really my biggest issue it's towing up steep grades in the summer that had me a little concerned. 6l80 operating temp, Otherwise the temperature is around 170 degrees driving normal. 2011 ctsv sedan, white, pistons, rods, crank, ported heads btr stage 3 cam, yank 2800 converter, level 3 trans, weapon x intercooler, upgraded super charger coolant tank, nitrous outlet direct port system, arh 1 7/8 stock mufflers, 9.1 LOWER 2.4 UPPER., Apr 1, 2010 · Normally, if you can stay below 200 degrees, you can expect a fairly long life. Here's a general temp chart to longevity. Keep in mind this is general. Your specific application may differ. 2010 2SS/RS Auto, Sunroof, Engine Cover. Transformer Edition package. 2013 ZL1 ragtop #5478. 1 of 54 CRT M6 'verts. Like., See our radar map for Islamabad, Islāmābād weather updates. Check for severe weather including wildfires and hurricanes, or just check to see when rain is due., Here are the most common causes of P0128: Thermostat Stuck Open - Far and away, the most typical cause for the P0128 code is a thermostat that is stuck open. When a thermostat is stuck open, it allows coolant to flow through the engine at all times. When this happens, the engine is "over-cooled" and never reaches the proper operating ..., If that temp is in fact accurate, somethings definitely not normal. Even flogging the piss out of mine for 15-20 min on an 85°F day, the highest I've seen is 213°, and came down below 205° immediately after. Normal cruise at that ambient temperature will hover at 194-200°, Bulletin No.: 22-NA-182. Date: September, 2022. INFORMATION. Subject: Information on 6L80 6L90 8L90 10L80 10L90 10L000 Equipped Vehicles With A Harsh Shift, Shudder, Surge, Stall, Transmission Overheating and/or High Transmission Fluid Temperature., ATRA - Intro to the 6L80 ATRA - Changes Over the Years ATRA - TEHCM Diag, T&E Installation procedures & fluid level check GEARS Mag: Diagnosing CAN communication issues (no scan tool) 6L80/90 TSB - UU0073 Communication Breakdown Between Modules (including the TEHCM) Parts List for Overhaul, , Thermostat Stuck Open - Far and away, the most typical cause for the P0128 code is a thermostat that is stuck open. When a thermostat is stuck open, it allows coolant to flow through the engine at all times. When this happens, the engine is "over-cooled" and never reaches the proper operating temperature., 123 posts · Joined 2009. #6 · Mar 22, 2014. When I was bone stock I saw temps between 180 and 210F with spirited driving in a northern climate. With all my mods now I haven't seen higher than 208 with trans cooler. I am on stock converter though. *SOLD* 2009 G8 GT, Roto-Fab intake, Magnaflow catback, TVS 1900 @ 9 PSI., To program a RiteTemp thermostat, first select Heat or Cool by pressing the mode switch. Then select the correct day to change that day’s temperature. Once the day is selected, pre..., Are you currently on the hunt for a new job? Perhaps you’re looking for temporary employment to bridge the gap between jobs or gain valuable experience. In either case, working wit..., Key Takeaways. Optimal Operating Temperature: The 68RFE transmission performs best between 170°F and 200°F. Impact of Overheating: Temperatures above 200°F can lead to transmission fluid breakdown, component wear, and potential failure. Cooling Methods: Effective cooling systems and regular maintenance are key to managing operating temperatures. ..., Sep 23, 2014 · Problem #1. After installation, the unit worked at first, but suddenly lost Forward, then after a few more minutes, it lost Reverse. The Service Fast Learn (SFL) process with the scanner would abort halfway through the process. When the unit was disassembled, it was discovered the 1-2- 3-4 clutch retaining ring had popped out of its …, , Hi. I have been researching the procedure for checking the transmission oil level on my 2018 GMC Sierra 1500 with 8L90 Transmission. I found a service document that says if the transmission is equipped with a Thermal Bypass valve, than the proper procedure for fluid level check is to heat transmission to 194 F and then let it cool to the 98F -113F range to do the fluid level check using the ..., The 8L90E is an 8 speed automatic transmission developed by General Motors and introduced for the 2015 Model year. It is currently phasing out the 6L80/6L90 transmissions (although it hasn’t done its all the way yet. Structurally, the 8L90 is similar to the 8L45, except that it is made to handle more power and torque., Cruise control, yes wile on flat land. Hilly land, I take over. 70-75 degrees outside temp the tranny will rock about 185-200 depending on the starts n stops. Once the outside temp gets to 80-85 plus she will sit right about 200-210. Then I come up to a couple stop lights and that is when she will climb to 220-225., Dec 19, 2020 · Asked by Visitor in Grovetown, GA on December 19, 2020. Just got a new 6l80 put in my truck and noticed the trans temp was a little higher than the old trans. I plugged in my snap on scanner and it showed two different trans temps. One was transmission fluid temp which was about 190 which is normal. The other was TCM temp …, It goes up to 203-206 in the morning before the T stat opens. Towing 9000lb 5'er it runs around 199-201 all day in 75-90 deg temps at 55-65mph. Climbing passes it will hit 208 and maybe 210 if I push it to 22-2300 rpms in 5th. Tranny temps are around 160-180 towing depending on outside air temp. Non tow around 149-155., 6L80E/6L90E Performance Transmissions Upgrade. If you are looking to get the most of your vehicle with 6L80E /6L90E transmissions and considering a major trans upgrade, Gearstar has the best products available on the market. Our high-performance transmissions —including GM 6L80 (level 1 and 2) and GL90 — are built to the horsepower, torque ..., Utah. Jul 23, 2018. #4. The average rule of thumb for transmission temps are 100 degrees over ambient temperature-in GM half ton trucks with the six speed transmissions. This is discussed to death on the various truck forums on the Internet. BTW-the Dex 6 has been tested up to 275 degrees. Last edited: Jul 23, 2018., The transmission temp does not matter for that one. 2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy. If you don't post your tune and logs when you have questions you aren't helping yourself. 04-18-2021 #3. tompitomas. View Profile View Forum Posts Private Message ..., 2 days ago · To combat transmission temp issues, installing an aftermarket transmission cooler is certainly helpful along with a deeper, higher capacity transmission pan if you have the space to do so, and thermostat bypass. 4l80e Transmission Filter. ... 4l80e vs 6l80: Difference Between 4l80e and 6l80 Transmissions, When Park or Neutral is selected after the transmission was operating in Drive, or Reverse, exhausting 3-5/Reverse Feed fluid unseats the checkball. This allows for a faster exhaust of 3-5/Reverse Feed fluid and a quick release of the 3-5/Reverse clutch. 08-21. 6L80 CHECKBALL LOCATION AND FUNCTION., Click the Amazon Link below to view or order part shown in this video 1. SURE COOL -- https://amzn.to/3z5GUzv2. TRANSGO DELETE -- https://amzn.to/3FP..., Also, transmission fluid isn’t flammable. However, it is combustible, so it will ignite if it’s heated above the flashpoint. Most transmission fluid flashpoints are between 302°F and 383°F (150 – 195°C). There’s a normal situation for everything that occurs with cars, and the transmission temperature is no different., My question is-does anyone know the normal operating temperature of a stock 8.1L, empty, not climbing? The one I drove started out at 208-210 degrees and stayed there whether idling or on the freeway. It seemed a little high to me, but again I'm not familiar with the 8.1L. The outside temperature was 60 degrees and I was at sea level., All 6L80/90's are torque base shifted units. The torque signal is calculated thru the ECM. ... The ideal operating temperature for this transmission is 180°or less. These transmissions have a tendency to run very hot - the cooler will lower operating temperature and recovery time which in turn will extend the life of your transmission., All 6L80/90's are torque base shifted units. The torque signal is calculated thru the ECM. ... The ideal operating temperature for this transmission is 180°or less. These transmissions have a tendency to run very hot - the cooler will lower operating temperature and recovery time which in turn will extend the life of your transmission., Nov 16, 2023 · W00030 Rev 1.1 31AS Properly fill with Dexron VI Automatic Transmission Fluid: Fluid Fill Procedure with Dipstick BEFORE YOU START THE VEHICLE fluid must be touching the bottom of the stick. Make sure the Vehicle is on level ground Start the vehicle and move the shift through all ranges pausing for 3 secs in each range. Final level check, …, By Alex Crissey. Published: March 28, 2023. Sonnax has introduced a new line of remanufactured TEHCMs for GM 6L80 and 6L90 transmissions. Each unit is fully electro-hydraulically tested to comply with OE performance and VIN-blanked for easy programming to any applicable vehicle, the company says. 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