Allison 6sp: TC Slip

[x MadMAX DIESEL]

Well I logged it about 2 months ago and the most slip I saw was about 250, just today it was 716 I knew I was hurting the trans with my mods from the start and I don't care I'm saving up now. I just can't believe its so much worse because I have Co Pilot now.

Is that what you would call a smoked converter or just a slipping one?

It doesn't effect the DD part, just WOT. If I keep it up though, can it get so bad that I won't even be able to drive like a civilized person?

 

[duramaximizer]

Was the converter commanded to be locked. When it's unlocked, it will slip a lot.

 

[x MadMAX DIESEL]

Yes with a 5 speed duty cycle

 

[Mike L.]

Well I logged it about 2 months ago and the most slip I saw was about 250, just today it was 716 I knew I was hurting the trans with my mods from the start and I don't care I'm saving up now. I just can't believe its so much worse because I have Co Pilot now.

Is that what you would call a smoked converter or just a slipping one?

It doesn't effect the DD part, just WOT. If I keep it up though, can it get so bad that I won't even be able to drive like a civilized person?

250 rpm slip indicates converter clutch is not even coming on. Suprised it didn't code.

 

[x MadMAX DIESEL]

The weird thing is I've never once thrown the trans into limp mode from any type of slip.

 

[Redbowties88]

The weird thing is I've never once thrown the trans into limp mode from any type of slip.

700rpm slip for more then a couple seconds should certainly throw a code....



codes aren't disabled in your tune are they?

 

[duratothemax]

Yes with a 5 speed duty cycle

what do you mean 5-speed duty cycle?



please dont say you programmed in the 5-speed duty cycle table into the 6-speed TCM tune...

 

[duratothemax]

codes aren't disabled in your tune are they?

you cant disable codes in the TCM. At least not with efilive you cant......

 

[Mike L.]

700rpm slip for more then a couple seconds should certainly throw a code....



codes aren't disabled in your tune are they?

TCC slip can take up to 100 miles before it throws a CEL. When it does it does not limp trans.

 

[x MadMAX DIESEL]

what do you mean 5-speed duty cycle?



please dont say you programmed in the 5-speed duty cycle table into the 6-speed TCM tune...

Yes, that is exactly what I did. I figured that 97 lock up would hold better than 62 in a worn TC. Is it really that big of a problem? I haven't seen anything that would make it seem like it was a bad idea

 

[duramaximizer]

Sorry you're not a newbie, I am assuming LBZ by the comments?

 

[x MadMAX DIESEL]

Yes

 

[duratothemax]

Yes, that is exactly what I did. I figured that 97 lock up would hold better than 62 in a worn TC. Is it really that big of a problem? I haven't seen anything that would make it seem like it was a bad idea

the 5-speed and 6-speed tcc solenoids are quite different....dont you think there is a reason allison configured the tcc solenoid duty cycle tables completely differently.

you might have burned out the tcc solenoid.

ben

 

[x MadMAX DIESEL]

If that was the case don't you think I would get one of these codes?

P2769 Torq Conv Clutch Circ Low

P2756 Torq Conv Clutch Press Ctrl Solenoid

P2757 Torq Conv Clutch Press Ctrl Solenoid Ctrl Circ Perf or Stuck Off

P2758 Torq Conv Clutch Press Ctrl Solenoid Ctrl Circ Stuck On

P2759 Torq Conv Clutch Press Ctrl Solenoid Ctrl Circ Electrical

P2760 Torq Conv Clutch Press Ctrl Solenoid Ctrl Circ Interm

P2761 Torq Conv Clutch Press Ctrl Solenoid Ctrl Circ/Open

P2762 Torq Conv Clutch Press Ctrl Solenoid Ctrl Circ Range/Perf

P2764 Torq Conv Clutch Press Ctrl Solenoid Ctrl Circ Low

 

[Turbo Buick 6]

If that was the case don't you think I would get one of these codes?

P2769 Torq Conv Clutch Circ Low

P2756 Torq Conv Clutch Press Ctrl Solenoid

P2757 Torq Conv Clutch Press Ctrl Solenoid Ctrl Circ Perf or Stuck Off

P2758 Torq Conv Clutch Press Ctrl Solenoid Ctrl Circ Stuck On

P2759 Torq Conv Clutch Press Ctrl Solenoid Ctrl Circ Electrical

P2760 Torq Conv Clutch Press Ctrl Solenoid Ctrl Circ Interm

P2761 Torq Conv Clutch Press Ctrl Solenoid Ctrl Circ/Open

P2762 Torq Conv Clutch Press Ctrl Solenoid Ctrl Circ Range/Perf

P2764 Torq Conv Clutch Press Ctrl Solenoid Ctrl Circ Low

Well I would start by putting the correct duty cycle back in and seeing what happens.....

 

[x MadMAX DIESEL]

 

[x MadMAX DIESEL]

Well I would start by putting the correct duty cycle back in and seeing what happens.....

I'll try that later, but I think the converter is done

 

[duratothemax]

I think you really messed up a good portion of it (either the converter, the tcc solenoid, or both) by messing with the tcc duty cycle programming...

 

[x MadMAX DIESEL]

Hmm well if thats the case so be it. I am saving up for a ppe trans kit now. Like I said its drivable, just not the fastest thing anymore. Anyway to test the solenoid?

 

[Mike L.]

Hmm well if thats the case so be it. I am saving up for a ppe trans kit now. Like I said its drivable, just not the fastest thing anymore. Anyway to test the solenoid?

You can ohm it but that is not conclusive. 8-16 ohms.