The clearance ( should have been good) I say that because the c5 is left stock in most upgrade kits. The truck had low mileage when I did the upgrade and I left the at the time the original c5 clutches a steels. So it never moved from the factory clearance.
Fully built 2011 Allison c5 burned?
- Thread starter Tothemax
- Start date
Anthony very well said. I think some are quick to judgement without knowing the background. I hope you get this figured out.
Now I have a question is there an upgrade for the C5's to make them more durable?
Now I have a question is there an upgrade for the C5's to make them more durable?
There is a upgrade c5 clutch. I was told by my former vendor that it isn't needed and that a lot of times cause issues. I figure due to the fact that the c5 clearance is adjusted by 4 different steel thickness. I can say that I am looking into this harder now with the people who do make upgrade c5s.
The C5 clutch pack does not need to be more durable. It is a huge clutch pack that holds a ring gear while the planetary gears revolve inside of it. There is no load on that clutch. Whatever happened here would have hurt any clutch no matter how good it was.
The problem here is; either the C5 did not have enough pressure or it was coming on when it shouldn't have. This could have been an assembly issue or possible main mod solenoid leaking. Hooking up a pressure gauge will help pinpoint the problem.
Figured I give a update went through the trans head to toe. Found no reason for the burnt c5's. After install new factory c5 clutches and steels reinstalled trans. First 5 mile test drive trans hit 205 on a 70 degree day. Did some pressure checks found line pressure at over 400 psi at anything over idle. After taking to Mike L found cause of the problem to be the (tuned) Tcm. Guess they messed with the pressure tables when the trans had the upgrade main line pressure spring. So after installing the factory tcm temps are back to normal. Can't thank Mike L enough for his wisdom!
right I think you just up the desired torque in ecm so the tcm will raise the pressure to compensate.
But Mike didn't know Steve younger had a shift kit so maybe there is just some really hidden secrets out there to these trucks?
You're looking for trouble numb nuts and it's going to come down hard and fast. If I read one more derogatory thing from your whiney ass you are gone for good. Think about it. There will be no more warnings.
He already said he swapped out the TCM.
If I had to guess, The only way I know it would be "tunable" would be if it had an A40 swap.
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Think he was using an A50 with a 2010 OS. You can't do that and use my pressure set up. Pressure will be uncontrolable.
You're looking for trouble numb nuts and it's going to come down hard and fast. If I read one more derogatory thing from your whiney ass you are gone for good. Think about it. There will be no more warnings.
Whoah Mike, why are you taking my comment as derogatory. I was simply pointing out that a super knowledgeable guy like yourself not being aware of Mr. Youngers shift kit which I have been using for quite some time, shows that sometimes there are parts that this forum has not yet found.
For all we know someone has a method to change the tcm calibration in the newer trans controllers.
Maybe if you did take everything I said so damn personally you would get along better. We are all into the same kinda stuff here so we do have common ground. Maybe we can try and find some and loose the instant hostility. I NEVER call you names Mike, or talk to you disrespectfully.
You still don't get it. There is no shift kit for the LML. The pressure mod was designed by Steve Younger with my help around my LML. Nothing was changed in the shift circuit. Pressure spikes are higher with this kit and we can control them from the valve body. That's why the shifts are better.
To say I wasn't aware of it is just plain ignorant.