Torque convertor question.....

[TURBOV6]

I got this number on the torque convertor AC-14031. I called Art-Carr and gave them this number and told me its a 9.5" 2800-3000 stall lock-up. But my tranny don't lock up. How would I check why its not locking up without taking the pan out.

Another question is if it has a 2800-3000 stall why can't I build no more than 5lbs of boost at the staging line?

Had this post in the Tranny sec. but no replies.

 

[Steve Wood]

well, the easiest explanation for no lock would be a bad switch on the brake pedal. Sometimes the contact burns and it does not make the connection. Or, the switch could possiblly be position wrong and the brake pedal could be holding the switch open.

It gets more complicated from there....

I guess the easiest test for a switch problem would be to put the key in the "Run" position and crawl under the car and see if the purple wire going to the tcc solenoid is hot. Put your test light between the purple wire and ground (or your meter). If the light burns or the meter reads battery voltage, then you know the solenoid is getting voltage.

If you have voltage there, then get in the car, put a jumper between A and F on the aldl connector. Start the car and accelerate lightly. If the tranny shifts really hard going into second, then it locked up which would suggest the ecm is not locking the tranny. If it does not shift hard, then I think the problem is probably inside the tranny...either the solenoid or some trash in the hydraulic circuit. Not being too up to date on these trannies, I cannot guarantee it, tho.

 

[TURBOV6]

Steve-O is the MAN!

Thanks Steve this will help me alot.

If there is now power at the purple wire when the ignition is on then might be a switch problem at the brake pedal? Is this brake switch the same to trigger the brake lights?

 

[Steve Wood]

I have a mental blank and don't remember. Cruise control, brakes, and tcc lock up are controlled by two switches on the pedal. I forget which two share the same switch.

If there is no voltage at the connector under the car on the tranny in the purple wire. The simplest thing to try is to lift up on the brake pedal with your foot....lift up, don't press down....you can try this when driving and see if the tranny locks up...that would be a sign of a misadjusted switch. If that does not work,

The tcc switch has two pink/black wires on one terminal. It gets is power thru one of them directly from the ecm/sol fuse.

The other terminal has the purple wire on it that goes to the tranny. With the key on, and nothing touching the pedal, this purple wire should be hot here as well as at the tranny. If it is not then it appears there is a switch problem. (I am assuming the pink/black wire is hot because it feeds several other things as well)

If lifting the pedal does not make the purple wire go hot, then pull the switch away from the pedal....it is just held in the switch mount by the plastic teeth on the switch nose so it can be adjusted. Pull the switch out and it can be popped open, One went bad on one of my cars recently and I opened the switch, rotated the contact, and it started working again and still is.

The switch opens when you step on the brake pedal. Pulling up on the pedal should close the switch so it can lock the converter. It should be closed with the pedal in its normal "non-stepped on" position or you can ajust the position of the switch so that it is...

 

[TURBOV6]

Originally posted by TurboV6

Another question is if it has a 2800-3000 stall why can't I build no more than 5lbs of boost at the staging line?

Can you help me on this one Steve?

 

[UNGN]

What RPM is the car stalling at? any turbolink data?

 

[TURBOV6]

Originally posted by UNGN
What RPM is the car stalling at? any turbolink data?

Stalling at? Sorry i'm new at this and sorry no data

 

[UNGN]

What is the highest RPM you achieve before you launch. A stock D5 converter should allow 2400-2600 RPM. If your converter is only allowing 2100 or 2200, something is wrong with it. If you are getting 2400 and it still won't spool, your car is too rich or there are header leaks or both.