Converter kicking out.

[jacobdewey]

Hey my converter unlocks at wot at or around 100mph. It seems to only do it in t/h mode and it also seems to do it more often if the road.....er track is rougher. It's not throwing any codes either. Any ideas what it could be? Shifts fine the rest of the time. It was fully built by custom auto. Thanks.

 

[S Phinney]

Which converter

 

[jkholder09]

Is the tcm still commanding tcc duty cycle when it happens?
If so I would say you are loosing apply pressure to the clutch which would be odd, or the clutch is slipping.

If the Tcm is releasing the tcc, than I would log all the speed sensors as well as tfpsw and range switch logic and report back.

 

[jacobdewey]

I don't know unfortunately. It's a billet triple disk. If I had to guess, it would be ppe, and it was a single charger, so whatever would match up with that. Custom uses bits and pieces to make up their own kit. I can't get ahold of Custom... Don't know if they are going out of business or what, but they never answer the phone. A guy is buying this truck from me and he isn't too worried about it, but i'd like to have it right for him if possible.

 

[jacobdewey]

When it doesn't unlock, it pulls really hard, so I doubt the clutches are slipping unless there is a intermittent valve body problem... but then you would expect a code. ???

 

[DIESELMAFIAPER.LB7]

is it the converter or the c3s slipping mine does something similar and I know its the c3s on mine

 

[jacobdewey]

It's the converter.. I watched it unlock on my insight. Plus, I held on long enough that it would have limped.

 

[A. Stock Lbz]

Would custom auto be on my way back to spokane jacob? Wouldnt it be throwing a bunch of codes if the converter was smoked or the c3s?

 

[jacobdewey]

Yeah, they are in Idaho falls. May be as simple as a speed sensor.

 

[A. Stock Lbz]

Do you remember what color the converter is?

 

[jacobdewey]

No, I could pop the inspection cover off when I get a second and check.

 

[Mike L.]

Could be a dimple problem on the converter.

 

[jacobdewey]

is it the converter or the c3s slipping mine does something similar and I know its the c3s on mine

I may need you to come run your scan tool to see whats going on Jake. I go in for surgery again on Wednesday so I'm getting down to the wire on this... Edge has data logging on the insight now, but it's pretty limited.

 

[jacobdewey]

Could be a dimple problem on the converter.

Not aligned correctly or...? I'm a total newb around transmissions.

 

[A. Stock Lbz]

Not aligned correctly or...? I'm a total newb around transmissions.

I think he ment simple problem

 

[DIESELMAFIAPER.LB7]

I may need you to come run your scan tool to see whats going on Jake. I go in for surgery again on Wednesday so I'm getting down to the wire on this... Edge has data logging on the insight now, but it's pretty limited.

Ya Monday will be the only time I'll have a min I leave Tuesday again. We can hook up to it though

 

[Mike L.]

I think he ment simple problem

No, I meant dimple problem. Input speed sensor counts dimples on the converter. If the magnet is weak on the sensor it can do weird stuff. The magnets are directional, hence they have to be clocked in the proper position. A dimple that is shorter, or a converter that is not exactly the proper dimension in reference to the speed sensor, can cause false readings and kick the converter out. Try a 4L80E speed sensor as it's not directional and see what happens.

 

[A. Stock Lbz]

Wow didnt know that. Lol thought it was a spelling error. Thanks for the info im buying the truck from him so something simple would help both of us out