6L80E/6L90E TCC Shudder Fix? - Could This Be The Answer To The Shudder Headache?
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- Опубліковано 9 лип 2022
- After studying the hydraulic diagram of this units I decided to try and make this modification to engage TCC as if it would be an on/off type of engagement. I understand that further testing might be needed and that maybe one of the companies like Transgo, Superior or Sonnax can come up with something similar. Even if it's not on/off but to regulate slippage better than what it is for now.
Torque converter companies also need to get together with their clutch suppliers to try and design a better clutch material or any more upgrades to the internal components if the torque converter. - Авто та транспорт
As always thanks for the great videos. I have a 2014 Silverado 5.3/6L80. I turned off all of the slip and set it up to only apply in 5th-6th gear. That all worked well but the computer was always on the hairy edge pressure wise of keeping the torque converter locked up (28-30 psi). I could feel it on/off slipping while the computer was attempting to hold it a zero slip. I would see the motor rpm slightly change at steady state driving. As I applied throttle the computer would raise pressure to keep it at zero slip. I then went into the apply pressure table and everything below 75 psi I changed to 75 psi. This thing now locks up like an old 700R4. Its like there is another shift and watching it with a scanner it never slips. I may work with the apply rate to try to soften the apply but right now I am happy knowing my converter is going to have an extended life.
Hiram thanks for helping formulate an enhancement request so the manufacturers develop a real world solution for all rebuilders. Translating your experience into the requirements for transco and others make sure end user gets a better longer lasting product.
Good luck brother very sure that gonna fix the problem, my best wishes on you 💪😀 thank you for sharing your experiences
Great video. Just what I was looking for with hydraulic diagram reading. 👍👍
great video you always give tons of information and looking forward to a follow up video of success
Hey ,can you give us an update on this procedure. Tell us if it worked
Great idea! Keep us updated.
I see exactly where you're going with this, Hiram. I have a 90 on the bench right now. Out of a 3500 flatbed truck. I'm curious about the apply feel. Gonna take a little trial and error most likely. But it is worth a shot. Great work Hiram!
Yeah, that's why I started at .045" . In my mind I'm just trying to eliminate hydrolock. I think it'll be okay. I'll try and film scanner data if possible.
@@AutomaticTransmission maybe a bore sleeve kit, redesigned valve deleting part of the circuit, heavier spring with the vent hole you explained to turn it into a on off no slip converter apply? what did you discover drilling a vent?
I made a couple videos where I tune the TCM to go full lock with the converter with HP Tuners and it works perfect and is very easy to do. Fixes both slipping and shuddering torque converters.
My problem is 2015 Chevy Suburban with D.O.D. Got rid of the shudder, but when downshifting or coasting, the pcm deactivates 4 cylinders and you feel it like its braking, or torque convertor applying too much, not letting go
@@gilbertorodriguez8847 Turn off DOD and improve reliability of engine.
Love your videos, I've learned so much more about transmissions from you. Very informative. Have you ever thought of being a teacher for a technical college or something similar?
This is going to cause other issues. Check tcc limit valve in pump. Transgo kit and valves. Plus using HP tuners and it is a fix for good. Lock up only 5th and 6th gear. Great idea and working out a problem.
Yes, I do the HPtuners with both Transgo kits. Some still give issues and I really think it's the aftermarket clutch on the torque converter. I've proven that by adding a bottle of Ford XL-3 friction modifier and shudder goes away. Even on GM reman converters. I add that when the valves and HPtuners are not working.
I've been putting in bullet cover single disc converters and using a good guy at tuning. Otherwise stock 6l80e's and having good luck so far. Locking the converter in 4-6.
Great information
Hiram that's a great idea...I think it will work
I built about more than 50s 6L80/90 and never have problems with tcc…I always use Sonnax zip kit, maybe a little bit more expensive than transgo, but works great, and of course always vacuum checking even with zip kit…By the way, that piece of vb not expensive if buy it brand new, and you not gonna have problems again, just buy separately that part of VB with NO WORN at all, put oem valves, and everything gonna work like a new vb. But it was interesting to listen your thoughts about it, and good to hear new experiments. I hope so, it worked! 👍
you're saying replace the Valve Body half where that regulator valve goes and use stock regulator valve not Trans Go or Sonnax regulator valve? Why Not replace VB half and use after market valve? Looking at the vacuum test with Trans Go valve seems to tighten up
the seal with the original VB anyway......
@10:47-10:57 I don’t blame you a bit. I’ve got an 05 Chevy Colorado that I’ve had since it was brand new, with over 250,000 miles on it that RARELY gives any trouble.
I have the same vehicle 3.5 with 170,000 only changed the fuel pump.
@@JOMaMa.. damn, I’m surprised you had to put a fuel pump in it at all. It might be a different story in other parts of the country, but I was working at a Chevy dealership when the Colorado first came out, and in almost 2 decades of being in the auto repair industry, I’ve only personally seen a fuel pump go bad on a Chevy Colorado ONE time, and I don’t know anybody else in my area that’s seen a fuel pump on a Chevy Colorado go bad at all.
@@dmorley100 my girlfriend ran it dry numerous times..
@@JOMaMa.. OOOOOOOHHH.
Excelente video.gracias por compartir.seria genial que hiciera videos para la comunidad hispana.no todos tenemos los medios para ir a capacitaciones.
I had the shudder with my 2018 at 58k miles I brought it to the dealer for repair and to document the issue before it hit 60k and warranty expired. Dealer pumped out the fluid and replaced with a new synthetic and so far no issues. I still have my doubts, but at least I’m in the system.
Any update on if this possible solution made a difference?
So is the mobile 1 lv hp fluid better than the dex 6 for the 6l80 I heard it wasn’t backwards compatible
Hirám cómo estás alguna solución para el golpeteo en retroceso
Where do you drill new exhaust hole
Pulse width modulation the TCC is nonsense. It burns the clutch material faster.
It's funny Hiram mentions driving his 94 silverado with a 4L60E and swears off the newer technology in the 6 speeds! I do the exact same thing! I have an LS swapped 94 Step-side silvy with a well set up 4L60E that I drive 95% of the time.. I've also got a 2012 Silvy 4x4 Z-71 with the aluminum 5.3L and 6L80E trans... I much prefer my '94 to the 2012.. Hiram, on the 4L60E's when we LOCK the TCC Isolator valve in place so that it can no longer move, (we actually machine the factory valves and install an O-ring to account for bore/valve wear that has occurred before we work on it) we don't need to drill the exhaust through the casting because the valve is no longer regulating... is there a reason you don't want to LOCK the regulator valve in the 6L80E in towards the casting and simply stop it from regulating and allow the valve in the pump to handle the regulation or on/off function? Would that not instantly negate the need for the regulation in the valve body? Kind of like blocking the valves in the valve body of the 4L60E for the 3-2 control valve and simply forcing the separator plate feed hole size to control the 3-2 presssure/timing? To simplify, why not just remove the TCC regulator valve from the valve body entirely (by blocking it)? If it's a harsh engagement that will occur, then maybe we can alter feed hole size elsewhere to control how firm the lock up is. I have the trans out of my 2012 right now, and I'd be willing to experiment with whatever method you recommend. I also have HP Tuners and do tuning for both Performance, and TCC on these vehicles. I THINK what you are trying to accomplish is to no longer have to use HP Tuners to alter the factory programming, and you just want a boxed solution from one of the shift kit manufacturers so that ALL of us can have a drop in/drill/plug solution without having to license and tune the factory programming... Am I right?
I just built a 6l80, it has shudder, at 45 mph, 1000 rpm to 1200 rpms at sudder.
Is there a way to determine if my 6L80e transmission is shudder mine sound like it’s coming more from the exhaust but my rpm gauge goes up a little when ever it does it can you explain more how to determine what the problem is or if it is the transmission?
I have a shudders and vibrations on 6Li0 when drive 50 mph and above on D mode only. Nobody can fix it
technician feed back always shows "engineers" how to fix the issues. Unfortunately some people get burned along the way by getting it fixed twice.
Did it work ?
how did this work with stock tune?
OK I'm doing it. Not going to tell how it works
Ironic that they do this for comfort but it causes an uncomfortable shutter.
The real problem is the manufacturer getting to fancy with all these stupid gear ratios. A 3 speed or 4 speed is enough already. Lockup in high gear is all you need. JMO
Thanx I have 2003 Chevy 1500 express van 4.3 does this. If I put load on it shudder stops. It stops above 70 mph also.
Yes, on light throttle is where it doesn't regulate pressure properly. Medium to heavy throttle is fine. That's what got me thinking on this idea that has been brewing in my mind for months now.
Dynamic torque converter is pretty much what wit sells these days
Yes, that's right. That's the name I was trying to remember. They've worked good so far.
Change the programming in the TCM
No one will answer, did this work ???????
No made it worse, don't do it.