6l90 2 3 flare fix Sep 26, 2012 · On cold start drives i get a nasty flare of approximately 1000-1200 rpms on my 2-3 shift. From the attachments below, Ive cut them to show 1-2, 2-3 and 3-4 changes, the 2-3 shows the spikes I'm on about, I've logged as may parameters as possible. I did mine at about 40k/6 years and shifting has been significantly improved. This condition may be caused by air that is trapped in the 3-S-R clutch assembly. 3 6L90: High Capacity 4-5-6 Clutch Apply Piston Kit: 104960-20K ✓ 3 No wave Requires F-104740-TL & VB-FIX 2-6 Clutch Regulator 802-463-4059 • www. Oct 24, 2017 · I am quite happy with most of the shifting here but have an odd 2-3 shift flare and then kind of a bang into gear at low throttle daily traffic style driving. Models cadillacs, chevrolets, GMC, hummers, pontiacs. I have one last issue I'm chasing down. And only 2-3. Acceleration under 80% calculated load and 3500 rpm results in a good 2-3 upshift. Oct 8, 2012 · I am hoping any tunners will chime in on this. Under WOT, the 2-3 flare is still noticeable and on occasion will hit the revlimiter. I've always hated how slow it shifts 1-2 when cold and my jerky 2-3 shift. September 19, 2019. Due to casting flaws known by the OEM but never fixed, they often crack. well, i didnt feel like i did anything that should even effect the trans. My old fluid was also looking perfectly fine. I've got 50k miles on it since putting it in. First time out of the driveway it flares/slips on the 3-4 ****. 2 %. Also the '18 tune has 2-3 offgoing pressure reduced a little. 15 at 113 at the local track with the 1750 DA. At 3k rpms it would sometimes jump to 4k between the 2-3 shift. I've been doing a lot of research about the flaring issue but still have no real answer on how to resolve it. I would reset that first to see if it takes care of it. Dec 13, 2022 · Hey guys, I have an 09 1500 silverado. Nov 14, 2006 · In the past, hints and suggestions for causes of 4L60-E 2-3 flare have invariably been centered on problems inside the transmission. I used OE filter and gasket and Amsoil fluid (ATLQT-EA). Jun 24, 2013 · C6 Tech/Performance - Trans Flare Issue - Resolved - So just in case anyone else experiences this issue, I wanted to post up for reference. Even did a follow up and still nothing. I decided to put in 4. When the first 2-3 upshift is made this trapped air is purged and the following 2-3 shifts will be normal with no flare. It does nothing at all in 1-2-3-4-5-6 as it is pushed out of the way by the fluid, it only comes into action when you go to P/R/N from the drive position. Nov 1, 2006 · Another contender that now can be added to the list of possible causes for 2-3 shift flare on a 4L60-E is a bad computer. com Page 3 6L45, 6L50, 6L80, 6L90 Zip Kit 1-2-3-4 Clutch 3-5 Rev. After driving for a few minutes it smooths out and does perfect. Introduced in 2006, the 6L80 is a popular, 6-speed, RWD transmission produced for more than 8 million trucks, SUVs and cars. Aug 31, 2017 · So if your trans starts flaring and a tune or fluid won't fix it. I am experiencing hard shifts from 1-2. The WOT spark drops to ~8* during the upshifts, (spins the tires on the 1-2 shift, hits hard on the 2-3). September 17, 2021. It doesn’t slip at any time and doesn’t flare under moderate or heavy throttle. This component is responsible for engaging the 1-2-3-4 clutch pack, forcing it into a synchronized state. I even had the trans rebuilt "I was having a 2-3 shift problem that I could not fix. Feb 3, 2016 · 2-3 sift flare 6l80; Results 1 to 8 of 8 Thread: 2-3 sift flare 6l80. View Profile View Forum Posts • Slip or flare on the 2-3 shift As you may have noticed, some of the conditions seem to contradict each other; they don’t, because they’re typi-cally not present at the same time. • Shift the transmission into 7th gear with the Join us as tuning expert Tony Gonyon helps resolve a lot of common GM 6L80 Transmission tuning woes. He'll discuss Torque Management, eliminating Torque Conv Oct 16, 2009 · It seems to only occur during cold starts. Feb 25, 2023 · All clearances were in spec and it has a new GM TCM. Anyway I,ve read the forums and watched videos and i can not fix this issue. Also it seems like all the programmed shift points aren't there anymore and shifts are very inconsistent with hard shifts and some soft shifts. The only scenario I can get it to happen is during an easy drive, say 1/4 throttle or less. Sometimes it's a light thump but other times its a hard jerk. Shift Pressure -> Upshift -> Pattern X, Y (Pattern Z not used in my tune) Jun 14, 2021 · The transmission in my Yukon. 2-3 Flare; 4-5 Flare; Delayed Reverse; 2. And 1-2 and 5-6 volume presets halved, extra disc (6l90?) or someother change? '15+ desired torque ouput 1-2 has positive and negative numbers, '12 model only had negative numbers '18+ desired torque ouput factor tables zero'd for 1-2 and 2-3 shift. It is definitely not the 2-3 flare issues others are having. Since I got it (month and a half ago) it flared on the 2-3 and 3-4 shifts when warmed up. Drive the vehicle to get ATF temperature to at least 104 degrees F (40 degrees C) and then make several 2-3 shifts at the throttle position determined to be the most sensitive to the 2-3 flare, This will allow Sep 8, 2023 · Patent-pending technology reworks the 2-6, 3-5-R and 4-5-6 clutch regulator and boost valves to produce faster and cleaner shifts with increased holding capacity without any bumps, clangs, bangs or software tuning; Street show-off options with HPtuners or EFI Live (Must be used in conjunction with #6L80-TOW&PRO) Jun 3, 2019 · The 1234 piston is a known issue with these applications. May 31, 2023 · Hi @RedSLEd - 2-3 flaring is very common and can have a few different causes however the most common is a leaking 3-5-Reverse drum resulting in apply pressure loss and air displacement and eventual burn-up of the 3/5/R (loss of those fwd gears and reverse) - see the TSB for this problem. About a week after the retune the trans developed a wicked 2/3 flare. I thought I might be doing something funny with the gas pedal but it wasn't in my head. you have a ticking time bomb. Im getting a more than occasional 2-3 flare shift that i could use some help figuring out. After that it never happens again during that drive. I have it pretty dialed in, traps 125mph in quarter etc. 1-2 Flare; 1-2 Bind-up; 1-2-3-4 Clutch burned; May 2, 2024 · '15+ have no adder modifiers. Jan 5, 2018 · Остановка отказа GM 6T40 и 6T70 3-5-R с помощью комплектов Sonnax Drum Saver. They did a fluid/filter change and reset the shift adapts. Identification Guide Always Identify These Valve Bodies BEFORE You Start a Transmission Rebuild. com You are browsing camaro5 Sep 6, 2016 · C6 Corvette General Discussion - Another 6l80 shift flare - Hey guys, I have a 07 auto that has developed a 2-3 and 3-4 shift flare. Then for the 2-3 shift, the 3-5-R clutch comes on as the 2-6 is released. I can watch the latest shift time PID and see if learn back always to this value despite what you command in the shift times and try to override in the pressure offset tables. Nov 5, 2023 · 2015 6l80. I have attached the tune file and my stock file for reference. Sometimes feeling a little slip-bump Jul 15, 2019 · 2-3 Shift Flare on 6L80E V8 and V6 Transmissions / Driveline (6L80 / 6L50 / TR6060 / AY6) 2-3 Shift Flare on 6L80E - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5. Truck has 175,000 miles on it and the transmission was replaced before I bought the truck with an ETE brand reman. Some of the most common causes are low line pressure and internal leaks of 3rd gear oil. Oh and ummm Ignore that weird bank 1 O2 issue way down in the log. Jun 1, 2016 · To accommodate the change, a new fitting was released with the modified bore at the line-flare area (Figure 9). There is a cross leak between the 1/2/3/4 circuit and the 3/5/R circuit. January 30, 2018. The shop installed a second valve body with all solenoids, but it didn’t help. The new fitting, which can be referred to as Type 2, retained the 3⁄4” pipe thread (0. I installed a tvs 1900 on it with a custom tune about 2 yrs ago and it has run great. Most would go out the door and work, some might have issues with shift quality or longevity, but old transmissions were much more forgiving than Oct 28, 2020 · This is way to fast of a shift specially when the 2-3 and 4-5 shift at this throttle level is in the . I also notice when cruising at freeway speeds in 6th gear, I TUTD into 5th and it downshifts what feels like 4th gear but eventually gets back into 5th. Nov 25, 2018 #4 df2x4 4L60E Destroyer. Dec 10, 2018 · Some customers may comment on a flare or harsh 2-3 shift or a bump/delay in 2-3 shift. Disabled for 2-3 gear change. Oct 10, 2024 · Hey guys, first post here, background info 2010 Silverado with 6. Important: When installing a new 1-2-3-4 / 3-5-R hosing into a 2007 or older 6L80, be sure to install all May 21, 2018 · After everything was back together, re connected the batter and drove off. The trans engages 3rd somewhat severly due to the increase of about 4-500rpm. The sensation when you select change gear, revs stay steady for 1/2 sec (flaring) where not much happens, then you can physically feel the gear change. 3 6l80e with intake exhaust and MAF only tune. Taking it into my local dealer to see what they can do. Came a long way from the stock 2-3 flare shift! Russ Kemp Nov 1, 2020 · If the 2-3 flare is determined to be ATF temperature sensitive use a Tech 2 to make note of the throttle position when the flare occurs. Clutch 4-5-6 Oct 27, 2014 · 6L80, 6L90; Dodge-Cummins Diesel; VB-FIX; Oversized 3-5-R Clutch Regulator Valve Kit 124740-21K. He will explain how the 2-3 shift is accomplished in these un Not one, but two separate transmissions with the SAME problem. I am using a friends MPVI to make a few changes to the truck. It used to be only when cold but can now happen any time under light throttle and can occur on the 3-4 sometimes. Mar 26, 2014 · Looks like my 2009 GT has a case of the 2-3 flare/harsh shifts and it sucks. Hope everyone enjoys thanks f Feb 22, 2020 · Multiple WOT runs through 1-2, 2-3, 3-4 gear shifts in all driving modes proved to have perfect shifting without a single hiccup, zero shift flare, and without noticeable strange noises or smells or anything. 400 second range. It drives me nuts to this day. The first 2-3 shift happens between frames 500 and 524. Drive the vehicle to get ATF temperature to at least 104 degrees F (40 degrees C) and then make several 2-3 shifts at the throttle position determined to be the most sensitive to the 2-3 flare, This will allow Jul 31, 2013 · The trans temp is ususally about 80 degrees due to the summer temp. Seems to me the 3-5-R I have looked and read till Im cross-eyed on this problem. Oh yeah Im wondering if I can do a write entire and maybe that will fix it? I havent done a full read on this trans and TCM. This month’s problem vehicle is a 1998 GM truck with a flare on the 2-3 shift before and after overhaul, with no trouble codes. The annoying thing in disallowing pass-thru-N down shifts is that in regular drive mode, it goes 6-5-2(or3) and the step is delayed. My 2012 had that problem and I hooked up the GM reflash tools from work and there are two selections. Therefore, it will be wise to update the piston to the latest designs. Volume Learns: • Complete 15 light throttle 2-3 upshifts at approximately 15% throttle to further learn C3. May 2, 2024 · '15+ have no adder modifiers. These updated pistons are available from GM and the aftermarket. During the first 2-3 upshift after the vehicle has been sitting, engine off for several hours. Only problem is my 6L80 has developed a flare on part throttle shifts in the 2-3 gear. Mar 8, 2010 · GMC: flare and or harsh 2-3 shifts. I bought the truck in July and I wasn't anticipating to have any issues with it other than maybe rebuilding the top end of the engine because of DOD. was gonna mess with the trans later when i feel comfortable, but theres a lotta tables to deal with there and im not up to speed there yet lol. It seems to have an odd 2-3 shift where its got a flare or some type of time adder that delays the shift. It shifts great except for a momentary bind after the initial 2-3 shift. 4-5 WOT definitely flares. The piston typically gets cracks that result in clutch failure. That 6th to 2nd drop is a doozy without TM as it goes through N. Im not sure if i need to adjust my torque signal numbers or if i need to adjust my oncoming pressure preset on 2-3? any help is appreciated. Most days, saving time is saving money, and there just happened to be a bulletin from Ford addressing this issue. Every other shift seems great other then the flare from 2-3 gear. My car is stock other than the magnacharger and tune but I'm pretty sure the dealership will try to void the warranty and not fix this even though it is a known issue. Mar 30, 2018 · Sometimes I would skip using the proper tools (figure 3), and doing the procedures like torqueing bolts, measuring endplays, or checking clearances with a gauge, often doing things by eye and feel. My car developed a very bad, very consistent 2-3 shift flare. sonnax. Once the problem is identified, I normally look for any “quick” fixes first. To Learn C4 (For 1-2, 5-6, or 7-8 Shift) 1. Basically it seems to be learning to flare the shift into third after driving the vehicle "normally". Got it back from the shop in April, but worked literally every day since May 10th, so just now got to troubleshooting it. It still slips occasionally, like once a week maybe. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright In this video Jay Robarge will explain a very common concern with Ford C4 and C6 transmissions. 1-2 (6700) 2-3 (6800) 3-4 (6900) Rev limiter 7300 Again, this is an example, but it is very common to command an earlier shift on the 1-2 to achieve the same rpm completed shift as the higher gears. The 1-2 shift is normal, but it has been having the 2-3 rpm slip with rpm flare. Symptoms are a slight flare into third, and a harsh 5th gear engagement, especially at fluid temps below 135 degrees. Great guy and knows how to tune this tranny. Built 6L80E, Billet Intermediate Shaft with Powerglide clutches and billet planetary. Jan 27, 2021 · condition may be caused by air that is trapped in the 3-S-R clutch assembly. with more throttle it gets better. I am experiencing a weird 1-2 shift. Clutch regulator valves can be confusing and easily missed. I did not change any seals or orings or anything. 500 flow), but uses the 0. 825 flare bore and has a purple clip. Oct 7, 2015 · It's an updated trans cal specifically to address the 2-3 flare issue experienced in some trucks. Drive the vehicle to get ATF temperature to at least 104 degrees F (40 degrees C) and then make several 2-3 shifts at the throttle position determined to be the most sensitive to the 2-3 flare, This will allow Apr 9, 2015 · My 09 GT is having some issues that I'm hoping someone here has had experience with. The only fix (assuming this is the cause) is to overhaul Jun 25, 2015 · Tune and log files attached. Apparently, the circumference difference was not extreme enough to set a C1078 code for “Tire Revolutions Range/Performance,” which would have assisted in the diagnosis of this 2-3 Mar 13, 2018 · Bench diagnosis of harsh 2-3 Nov 2, 2014 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Sep 23, 2014 · Browse all 6L90 transmission parts here or use the filters below to find just what you are looking for. So, moral of the story is I'm not impressed with the 6L80. fluid is fine everything works Pretty stumped. While the teanny was in learn mode it felt great. i have attached my tune if anyone can look at file it would be greatly appreciated. Feels like the motor pulls a bunch of timing. since then the transmission shifts nice and smooth, but at part throttle it will flare about 200 rpm at 1500 rpm, and if I get onto it, itll flare at 3,000 rpm about 900 rpm. May 17, 2023 · Trans is a fresh rebuild and struggling to shift from 1>2. Apr 15, 2016 · Did you replace the fluid or only adjust level? I would recommend you to replace fluid by dropping pan, replace filter and gaskets. I had the truck tuned a little over a week ago. I am quite pleased now in that it seems like *for me* there was a very easy and cheap fix for my 2-3 shift flare. maeschen - My ctsv has a 6L90 is in with the same issue. 2 gen4 L9H and 6L80, 150k miles all original and sitting on 35s. As you drive this symptom goes away. Anybody any Apr 8, 2016 · I don't know anything about your 1-2 shift problem but there is a trans calibration to address the 2-3 flare. Backstory:Two separate 4L60E transmissions with Sep 16, 2022 · So, the first thing to do is to look at an apply chart, where we see that the 1-2-3-4 clutch is on in 1st Gear and the 2-6 clutch comes on in 2nd Gear. Andrew Jessiman. However, GM updated the piston. This condition is a NORMAL characteristic of the Mar 4, 2019 · I need some help tweaking my torque model Having some issues with my 2-3 shift flaring/slipping after a WOT pull. It also does perfect on WOT shifts and even heavier acceleration to 4000rpm; nice crisp shifts. log doesnt show it, shifts look fine on log to me. When diagnosing this condition, a garage shift into reverse before drive will purge this air and prevent the 2-3 flare from occurring. crsbelton. After a few minutes of driving i noticed that the 2-3 shift had developed at significant 500 rpm flare. The 3-5-R clutch regulator valve is also known to stick and cause no Reverse and shift complaints. Equipped with 6l80 (rpo myc) or 6l90 (rpo myd) automatic 2. 10 gears and had it retuned for the gear change. Issues with the 1-2-3-4 pistons are common in 6L80 transmissions. Wondering if anyone can help. The piston can develop cracks, which may lead to clutch failure (figure 3). So a slipping shift can be followed by an aggressive shift the next time. That’s because the Transmission Electro-Hydraulic Control Module’s (TEHCM) Jun 7, 2023 · 2. But is way better than slip I would get on the first 2-3 shift after every cold start. Any input? Many 1-2-3 attempts here at various throttle levels. The last few days I have not noticed this 2-3 shift problem. Intermittantly it will act like a false neutral going into 3rd gear at around 25% throttle. I used that and it's been a million times better. Nov 24, 2018 · I thought the 2-3 flare was a fairly common issue that the Transgo shift kit was designed to address. previous owner had a tune and I took it off. Diagnosis & Fix: First-time Diagnosis Can Be a Chore! Jul 1, 2017 · If the 2-3 flare is determined to be ATF temperature sensitive use a Tech 2 to make note of the throttle position when the flare occurs. This condition may be caused by leaking 1-2-3-4 and 3-5-R clutch fluid seal rings. Jun 9, 2019 · This is a 2014 Silverado 5. Sep 11, 2018 · When the first 2-3 upshift is made this trapped air is purged and the following 2-3 shifts will be normal with no flare. One of the big so called tuners offered to help. . It doesn't happen under all loads and it shifts fine and holds without slip under WOT. Mar 2, 2022 · The computer perceived this as a slip and would engage the rear electronic differential while the 2-3 shift was taking place causing the bump on the 2-3 shift. The only fix (assuming this is the cause) is to overhaul Mar 8, 2023 · 1-2-3-4 Clutch regulator valve stuck, no Forward. I paid a trans tuner to fix it but have not gotten what I want out of that either. Reviewing this data, we see that during a 2-3 shift, the 3-5-R is applied, but the 2-6 must release at the same time. His customer service is top notch also. Protect Against 6T40 & 6T70 3-5-R Failures & Salvage Damaged Drums with Sonnax Drum Saver Kits. Jul 23, 2015 · TSB Number PIP-4395 NHTSA Number:10026149 TSB Date:August 1, 2008 Date Added to File:October 2, 2008 Failing Component: Power Train:Automatic Transmission Summary: GMC: flare and or harsh 2-3 shifts. i wasnt sure if it was the maf recalibration causing problems or if it just needed reset. Sep 5, 2023 · It says 79. Just compare it to the stock tune to see the changed tables. The dealership says 2-3 flare is normal. • Shift the transmission into 7th gear with the Not much of a flare on the 4-5 under normal acceleration. This condition may be caused by leaking 1-2-3-4 and 3-5-r clutch fluid seal rings (230). Warranty still has another two months left powertrain. I've had it on my (2012) truck for about 6 months now. Jun 11, 2019 · If the 2-3 flare is determined to be ATF temperature sensitive use a Tech 2 to make note of the throttle position when the flare occurs. 2 escalade, circle D stage 3 6l80, circle D 258mm billet tripple disc. GM 6T40 & 6T70 Drum Saver Kits: Unbeatable Protection Against 3-5-R Failures & Comebacks. I have done changes to shift times, adders, pressures and nothing seems to help. I have since found that if the truck is dead cold it works for a few minutes, albeit softly, but after it gets even a little warm the flare comes back until its cold again. It's unmanageable in higher HP cars without TM, period. So question so under max volume why all shifts are set to 200 expect for drum roll 2-3 shift? It seems GM wanted these to flare in 2-3 shift. This condition may be caused by air that is trapped in the 3-5-R clutch assembly. All other gears are fine and operates well otherwise. Usually when the shift started at 3k it would be a This video details a common issue with the 6L80E transmission, particularly in Chevrolet and GMC trucks with the 5. Staff member. The internet will say no, but I say otherwise. In sport, that 45 MPH shift would be 5-2 in one jump as described above. Aug 29, 2017 · I have a 2010 Silverado LTZ with 88,000 miles. I am pretty good at tuning my engine how ever the dreaded 2-3 shift flare hads reared its ugly head. I see a ton of trans slip come in after the 1>2 is commanded. 3 6l80e im having a flare in my 3-4 and im kind of lost ive read all over the forum, I purchased the tuning school 6-speed guide and it still does it so I hope someone can put me on the right path Because it really bothers me and im willing to learn but ima bout to throw in the towel and just take it Fix it before this happens!!! Learn the common FAILURES in your 6l80e transmission It’s a terrible thing, but happens a lot. Not knowing the service history (it has 133,000 miles on it) I had the fluid and filter changed last Thursday. GM updated the piston, so, if you’re working on an early application, always update the piston to the later design. 3L Gen 5 engine. Installation of a 2008, 6L80 complete housing assembly into a 2007 or older 6L80 may result in a 2-3 shift flare or 3-5-R clutch distress. car went 12. February Oversized Clutch Boost Valve 104740-01 Fits any of 3 locations F-104740-TL* Code P0751, 1-2-3-4 Clutch burned, 3-5-Reverse clutch burned, Cruise control disabled Clutch Select Valve Spring Kit 104740-02K Mid '10-earlier, includes 2 springs Harsh shifts, Downshift clunk, 3-4 Bump, Bump shifts, Flare shifts, Bind-up, Burnt clutches I've had my 6L90 and LY6 in my 1978 blazer for years. I have a O2 sensor thats flipping out after WOT. I think the upgraded clutch Sep 7, 2016 · For example, on my 2009 6. Aug 25, 2019 · 1. And noticed instantly that my transmission would flare from 2-3. I tried the extra fluid with no luck. change to the 1-2-3-4 piston, 1-2-3-4 piston housing and the 3-5-R piston for the 2008 model year. if its the actual tune, then it aint worth changing to me to deal with that Any idea why the 2-3 shift max adapt volume (D9264) is 40 while the rest of the shifts are 200? Would this narrowed learning volume explain why some of us have light load 2-3 shift flares, but solid heavy load 2-3 shifts? Would opening up the adaptive volume to 200 help the 2-3 shifts? Oct 3, 2016 · DA was around 1700-1850, da was down to around 1200 in the morning at LSfest but the wife tried her best and hit the brakes and still broke out with a 12. Jul 7, 2023 · Bominator - a shift flare is a temp slip when the trans shifts gears. The avalanche is a 2012 with 25k miles. It force the 1-2-3-4 clutch fluid through an orifice to smooth out the release to help avoid driveline clunks. I have attached my current tune. I just recently installed a 3500 circle d stall triple disc converter on my 2011 gmc sierra 5. I've lowered the WOT shift speed and shift RPM and it still does not shift properly. July 01, 2020. Now I am getting constant shift flares from 2-3. Line pressure is not commanded high enough on the 3-4, that's why it breaks loose like that on the 3-4 when the 3-5-R releases and the PCS 3 has not yet ramped up all the way to max. the dreaded 2-3 shows up fine on the log, shift time shows its good, however it seems to hang between 2&3 before 3rd engages fully. Thread Tools. Show Printable Version; 02-03-2016 #1. It acts fine at WOT and spirited driving, doesn't act up in manual mode, and only does it randomly. Prevent Failure with a High-Strength Billet Piston. Some guys say trans is shot need a rebuild. I've had the truck for years and always gotten a cold temp 3-4 shift flare in the past, decided to dive into HP tuners recently and learned this flare happens when trans temp is below the adaptive trans temp threshold. 2 ext, from day one, it has always had a 2-3 flare that will happen randomly and not every day, or it even skips a few weeks before it happens again. Also, the piston housing may crack. 05 pass or right around there. Pressure Learns: Note: It is recommended to utilize a road with a speed limit between of 64-72 km/h (40-45 mph) for this procedure. May 2, 2021 · Under around 50% throttle 1-2 shift is great barks the tires, same with 2-3 shift BUT I normally end up easing off the pedal around this point and the trans downshifts back to 2nd and will hold it for 3-5 seconds then shift back to 3rd. Nov 27, 2019 · I recently had the pleasure of dealing with a 2010 6R140 with a 2-3 flare that became worse as the temperature increased. It will shift from 1st into 2nd, rpms will rev up, and then it feels like it shifts and locks into 2nd after that. I would back the 1-2 and 2-3 shift rpm down to 6800 and set the rev limiter to 7200 and get a log to see what happens. All it took was 3 I have a 2015 5. The **problem stems from Oct 11, 2013 · Finally got this trans to shift properly. More recently, information has come out about input housings with the 3-4 piston feed hole mismachined in the lip-seal area. I Problem #8 - The 1-2-3-4 Apply Piston A problem that could plague anyone in any application is a catastrophic failure of the 1-2-3-4 apply piston. my 1-2,3-4,4-5 shifts are perfect, feel fine and shifts just right. Valve Body Layout GM 6L45, 6L50, 6L80, 6L90 Valve Body Layout Sep 4, 2023 · Turbo 6. I'm hoping it's just needing a tweak to the torque model. One said something to the tune of "use only if complaints of 2-3 slip during shift". 3 Sierra Z71 with the 6L90. Sent them my tune and nothing. That's when I got a PM from a CTSV forum member hooking me up with (wacker). I often get a flare on the 2-3 upshift. September 10, 2019. Heavy Duty 1-2-3-4 Piston. Above that and it will flare a little on the upshift. This is the Neutral condition. Truck drove great before I disconnected the battery any suggstions. What this means is it will use the torque reported from the ECM to calculate the shift pressure as opposed to using one of the '3 levels' of shift pressure values that corelate to the torque numbers in the low / mid / high tables. Typically it's worst when it's cold but does it pretty consistently about 1/3 of the time I accelerate from a complete stop. Oct 27, 2014 · GM 6L45, 6L50, 6L80, 6L90 Vacuum Test Guide. The TCM by design is commanding a momentary pulse of solenoid 3 to precharge the 4-5-6 clutch for the 3-4 shift. Apr 6, 2022 · S9, now ON, allows AFL oil pressure to travel through the solenoid to 1-2-3-4-5-Reverse clutch boost valve and stroke it against the spring-exhausting 1-2-3-4-5-Reverse clutch. Once the car is warmed up it is fine. The 1-2-3-4 clutch regulator valve issue is usually discovered after the repair/reinstall. It's used by GM in about 20 models, most widely in the Chevy Silverado, Tahoe and Suburban, the GMC Sierra and Yukon, and the Cadillac Escalade. Problem #8 - The 1-2-3-4 Apply Piston A problem that could plague anyone in any application is a catastrophic failure of the 1-2-3-4 apply piston. Others say the had their trans May 31, 2022 · Cracks in the 1-2-3-4 Pistons. During the first 2-3 upshift after the vehicle has been sitting, engine off for several hours. Identification Guide GM & BMW 6L80 Family Identification Guide. The following conditions are indications that the fluid seal rings may be leaking. I have seen the service bulletin and it seems that the cause is the clutch fluid seal rings leaking. 19 at 106, which looking at everything it would have been a 12. It doesn't do it again until the key is cycled. you can feel it grab the gear and then slip. ygkyk kzkuq omwbxiov mzyl ktaari kqnksbg xvpv ogd osnu nioto sxik xrx atug tmal ygx