TC Lock-Up Switch

TrentNell

Finally underway !!!!!
Jul 7, 2008
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slc tuah
yeah, I'm waiting on a price from Mike to change to the tightest 3 disc converter they have. I've heard the 1058 I have has had lockup issues on several trucks, not just me. That's why I'd love to get it to lock in third, but I'm probably wasting my time.

edit: just looked at your log, big difference in rpm drop down low. Mine just slips...............

here's a log from 2-14-08, a month after I bought the converter. Same thing, maybe 200 rpm drop or so in rpms on the 2-3 shift.

Jody

the 1054 would be a good choice , very tight when i had one in my truck.
 

MMLMM

Tunergeek
Mar 2, 2008
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www.dyncal.com
Played some more. even when trying to stay in 2nd gear, t/h, the converter wont lock. It will if I feather it into WOT, or start in Manual 1 and move up to 2nd slowly. When it hits 3rd sometimes it locks and sometimes it dont (right away) but it wil always lock 3rd after a bit of messing around.

4th nd 5th are always locked, or no TCC slip anyway in T/h or normal....
 

DuramaxPowered

Pushing my luck....
Jan 27, 2008
791
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Monroe, MI
However, im not sure D5072 is labeled correctly. Because of the way the allison works, it doesnt really reference anything in PSI, because pressure is fixed by the converter flow valve; the TCM cant control pressure to the torque converter. So all the values in D5072, I dont think those numbers are PSI. Something else...

ben
I could be wrong, but I just did some logging and the table seems to be right. It seems that the TCC solenoid pulsing is creating a lower pressure at the start of lock-up on a stock tune, and it gradually goes to full pressure . I just loaded a tune that has 145psi values for the whole 295 and 443 columns, and going by the log, the pressure to the TCC goes from nothing to full with no smooth ramping up. The stock tune would go from 0 to 66psi for a split second, and then full pressure 152PSI according to the scan tool.
 

duratothemax

<--- slippery roads
Aug 28, 2006
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Wyoming
I could be wrong, but I just did some logging and the table seems to be right. It seems that the TCC solenoid pulsing is creating a lower pressure at the start of lock-up on a stock tune, and it gradually goes to full pressure . I just loaded a tune that has 145psi values for the whole 295 and 443 columns, and going by the log, the pressure to the TCC goes from nothing to full with no smooth ramping up. The stock tune would go from 0 to 66psi for a split second, and then full pressure 152PSI according to the scan tool.

no, I know that....thats what the pulsed apply is...

What Im saying is I think "PSI" is the wrong UNITS to have applied/named to the table. Because as far as I know the TCM doesnt reference ANYTHING in psi. Only duty cycle or on/off. If you log the TCM, you see the TCC solenoid DUTY cycle go/ramp from 0% to 50, 66, 77, 90, 98%, etc.. Its % duty cycle...not PSI.

I could be wrong though.
 

TrentNell

Finally underway !!!!!
Jul 7, 2008
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no, I know that....thats what the pulsed apply is...

What Im saying is I think "PSI" is the wrong UNITS to have applied/named to the table. Because as far as I know the TCM doesnt reference ANYTHING in psi. Only duty cycle or on/off. If you log the TCM, you see the TCC solenoid DUTY cycle go/ramp from 0% to 50, 66, 77, 90, 98%, etc.. Its % duty cycle...not PSI.

I could be wrong though.

you are right ben ... quite simply because there is no sensor for tc pressure for the tcm to reference . i think the pressure in the table is a hypothetical # kinda like they use mm3 for in the fueling table's .
 

racinmike77

New member
Sep 14, 2008
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I agree our speed sensors are not accurate as mike said, which is why you can burn clutches and not limp imo.

I also think you guys converters are too loose to lock it would be too violent for your converter to lock when you want it.

Brayden has the turbobrake on sale which can command lockup.
 

duratothemax

<--- slippery roads
Aug 28, 2006
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Wyoming
I agree our speed sensors are not accurate as mike said, which is why you can burn clutches and not limp imo.

what makes you say that? Would you still have that opinion if mike hadnt said anything about it first? :rolleyes:

I also think you guys converters are too loose to lock it would be too violent for your converter to lock when you want it..

I know. I already established that point 2 years ago when I first started complaining about this annoying allison trait.

ben
 
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duratothemax

<--- slippery roads
Aug 28, 2006
7,139
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Wyoming
i have a turbobrake and the converter locks at the start of second gear everytime. at least the light comes on. so i am pleased

I dont know why brayden cant just release a standalone lockup controller.

Hes had the turbo brake out for a while, which obviously works as a lockup controller......so whats so hard about taking off the "turbo brake" part of your widget and just selling the lockup-controller part?????

and before anyone says "well brayden is busy and you dont know what goes into making this stuff, its a lot of work", mmm yes, I do. I made the 6-speed tap-shift work on my 5 speed a year ago with a custom designed controller box, so Im aware of what sort of design stuff goes into these gadgets.

ben
 

TrentNell

Finally underway !!!!!
Jul 7, 2008
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slc tuah
I dont know why brayden cant just release a standalone lockup controller.

Hes had the turbo brake out for a while, which obviously works as a lockup controller......so whats so hard about taking off the "turbo brake" part of your widget and just selling the lockup-controller part?????

and before anyone says "well brayden is busy and you dont know what goes into making this stuff, its a lot of work", mmm yes, I do. I made the 6-speed tap-shift work on my 5 speed a year ago with a custom designed controller box, so Im aware of what sort of design stuff goes into these gadgets.

ben

brayden is building a lock up conrtoller for a friend of mine with a lb7 , should have it soon he ordered it a few weeks ago and was told 2 weeks , i will let everyone know if it actually gets to him and if it works well .
 

SmokeShow

Well-known member
Nov 30, 2006
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Lawrenceburg, KY
I dont know why brayden cant just release a standalone lockup controller.

Hes had the turbo brake out for a while, which obviously works as a lockup controller......so whats so hard about taking off the "turbo brake" part of your widget and just selling the lockup-controller part?????

and before anyone says "well brayden is busy and you dont know what goes into making this stuff, its a lot of work", mmm yes, I do. I made the 6-speed tap-shift work on my 5 speed a year ago with a custom designed controller box, so Im aware of what sort of design stuff goes into these gadgets.

ben

Why don't you do it and then get some well deserved monitary kickback for all your knowledge??? You know and understand the electronics of these things FAR better than most and IMO can and should be using it to your advantage monitarily. ;) :hug: :cool2:


C-ya
 

othrgrl

Diesel Addiction Owner
Mar 10, 2008
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Wilmington NC
www.mydieseladdiction.com
Why don't you do it and then get some well deserved monitary kickback for all your knowledge??? You know and understand the electronics of these things FAR better than most and IMO can and should be using it to your advantage monitarily. ;) :hug: :cool2:


C-ya

I was wondering the same thing. IF you can build a controller for the tap shifting why having you built a TC lock-up controller yet?:cool2:
 

duratothemax

<--- slippery roads
Aug 28, 2006
7,139
10
0
Wyoming
I havent been able to figure out what kind of FET/solenoid driver to use to drive the TCC solenoid.

Its a low side driver, but I dont really know how much current, etc.. the FET/relay will need to be able to handle to properly drive the TCC solenoid.

Im pretty sure its pulsed at 100hz, with varying duty cycles.

Making the control circuit is pretty easy. Simple PWM generator, set it to 120hz and a max of 97% duty cycle, and use a capacitor on the discharge leg of the 555 timer, which would give a ramp up from 0% to 97% duty cycle over say 1 second....

I just dont know how to interface that circuit with something that can actually drive the solenoid itself.; im not an electrical engineer.

ben
 
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