My Yank SS3600 will not stay locked up under cruising. The car has been tuned two different times with the converter, once was a mail-order tune from Frost, the next time was a street tune after I installed my cam from a guy that was HIGHLY recommended to me from people at my home track, London Dragway. Both tunes have been great drivability wise and performance wise. But both had a common issue, the converter won't stay locked. It's been an intermittent issue, I've gone as long as a month without it acting up at all, then some weeks I'll have to drive the car in 3rd so the converter won't just constantly unlock and lock. (Don't worry even in 3rd and unlocked the trans never gets above 165 degrees.)

Whenever I posted on Facebook about it, I was told by multiple people that it's indeed in the tune, mainly blaming misfire detection, well after a conversation with my tuner, he said the misfire detection is turned off, and that if he left it on, the converter would constantly go in out of lock up and not stop for a month every once in a while. My tuner is guessing that it's either the TCC Solenoid or the converter itself. I'd really hate to think my converter is done after less than a year, and the TCC Solenoid is less than a year old too, as I had a brand new Performabuilt level 2 60e installed along with the converter November of last year.

Here is a link to exactly what the car is doing, cruise is set around 65mph here, it's subtle, but annoying nonetheless.


Like I said, it's intermittent. I put a new MAF on in hopes that the MAF Low Input Code was causing it, well this was on the test drive, it drove about 5 miles perfectly fine, turned around, got on it one good time, and immediately after it started doing it again.

 

I would speak to Performabuilt and see what their recommendations are or you could throw some parts at it. You could also try installing a Fitzall part # A74741QA TCC valve and see if that will fix your problem.

 

Yeah I emailed Frank to get his opinion on everything, before I start throwing money at it. Also emailed Yank and they said since the issue comes and goes, that it's either tune or transmission related and said to look at the solenoid first.

 

Frank said, if it was a TCC Solenoid that it would set a code. Told me to have my tuner uncheck some stuff in the tune to see how it behaves. Guess I'm stuck driving the car two hours out to get this issue fixed. Hopefully.

 

before you go shot-gunning parts at the thing and guessing what it might be

put a scanner on it and watch tcc solenoid
see if it is being commanded on/off/on/off/on/off
or see if it is constantly commanded on and you have a mechanical issue that is letting it unlock

 

I don't have access to a scanner to log the TCC Solenoid.

 

then buy one
or find someone that does

because without the proper info...you're guessing at best

 

Any recommendations on a scanner that's worth a damn? Only thing I have is a little bluetooth one to tell me codes. Lol

 

I bought this from amazon: , I'm sure there is something cheaper. I used to to diagnose a converter coming unlocked and tripping a code. Turns out there was a mechanical issue as I was able to see the computer was commanding lock-up and the converter was letting go for whatever reason. Ended up with a new trans.