What is the TCC slip speed at max duty cycle when the converter is supposed to be "locked up".

If it's more than 10 rpm or so, the tcc is slipping. At 262k it's prob done (the converter clutch). The tcc regulator valve and it's bore in the valve body is likely worn, same with the AFL valve bore. If you can diagnose the tcc being the direct cause, trans has to come out. And with the mileage on the unit, it would make zero sense not to overhaul it at that time, then go back with a brand new converter.

 

Hey Ive got high slip speeds, around 500 on light throttle and reads higher. When I manually activate the tcc solenoid with my scan tool I get next to zero slip speeds. Just overhauled my transmission due to no 3-4 and did a transgo while in there, problem was there before.

 

So, how is it at this point intermittent? I infsr that it will be constant if i dont address it and just keep driving it? Thanks.

 

What's the TCC slip speed when duty cycle is at or near it's programmed max?

If you wont answer any of my questions, why should I respond to more of yours?

 

So, i dont have any data for tcc slip or anything for duty cycle, i can use the scanner at my work when i get back monday, its a full size newer one, could i follow up then, is that data the most important thing here?

 

It is to me right now based on what you have stated above. If that description of your problem is not accurate, feel free to restate it.

I'd bring up all the transmission PIDs and record the logs so you can refer back to them/post them here. Id also look at / record engine management sensor/switch data to see if anything unusual (like misfires) is showing up there when the symptoms present during your test drive.

You may or may not have a TCC problem at all but wont know until you capture the data.

 

Ah okay
[QUOTE="NickTransmissions,

Okay, ill update as soon as ive got the data anything else it could be other than the tcc? I domt have active misfire codes but i have codes for evap vent solenoid/small leak .

 

Ah okay
[QUOTE="NickTransmissions,

[Could it be] anything else it could be other than the tcc? I domt have active misfire codes but i have codes for evap vent solenoid/small leak .

I was using a misfire as an example, not suggesting that's what's causing your problems...Yea, it could be anything beyond the TCC, or the TCC but there's no reason to speculate any further on what's causing what until you have some data.

 

Right right that makes sense, any other data points i should watch other than tcc slip, input rpm output rpm?

 

I'd look at all engine and transmission data to see if anything sticks out as problematic but I'd focus on the torque converter slip speed and duty cycle because if the DS remains high but the slip speed is around say, 100-200 rpm, that would be 100% confirmation your converter clutch is slipping. Assuming that's what the data shows, the read diagnosis begins - which is to find out why is slipping.

Confirm or deny the condition first then start hunting down the causes.

 

I really appreciate all your help man. Do you rebuild transmissions for work?

 

No problem, happy to help...Yep, it's my full-time occupation.