from what i have heard and read when its cold the converter wont lock up, but mine is the opposite. it locks up when its cold and after the trans temp gets up it wont lock up. any thoughts?

 

bad converter

 

I would look at the data and see whats being comanded something dosent sound right there.

 

its a fairly new converter. less than 300 miles on it...

 

When I bought my converter I had the same problem. Everyone kept telling me that it was the tune, but I later found out that the lock up clutch was all fucked up.

 

well that doesnt sound good. last thing i need right now is a problem like that. i cant really go without my car.

 

You should still verify what the PCM is telling it to do thats allways the first step and in many mnay cases thats where the issue lyes

 

i will do that as soon as i can

 

well i talked to dave at yank and he said that its not the converter. he said it will either lock up or it wont. the temperature of the trans doesnt matter. so either i have a tuning issue or my trans is fucked some way.

 

Yank could be wrong. When I bought my PT4400 It would not lock up. I had the converter for less than a month and the lock up clutch **** the bed. It was not my tranny(which was brand new at the time) and it was not the tune. It was a bad converter.

 

if its locking sometimes and not the other then its prolly a tranny related issue like a noid or something..IMO

 

You might check for worn valve body bore(torque converter lockup valve) can do this, as fluid gets hot and thinner it can leak around the worn valve and loose pressure needed to keep the clutch active.

 

well i will deal with the beginning of the year. i dont drive the car much, just on base so it never gets warm enough to start acting up. just noticed it on my way home from top gear yesterday.

 

Take it to your local tranny shop. They should have a scanner or preferably a TRAN-X 2000. It's a breakout box and reads all of the ohms,amps, and resistance while testing componants such as your lock-up solenoid or the TFT sensor's resistance. Which by the way is temp related. Also, you could have nicked the input shaft o-ring just enough as to have pressure when cool but not warm or hot because softening of the o-ring and/or thinning of the ATF. Usually the clutch won't last long if it's a single disc. multiple discs create more crap and it gets everywhere. Time to clean out the trans! The first sign of trouble, get the trans out and check it but make sure a pro looks at it. Some of you don't do tranny's. My point is, if your exspensive motor has a noise, your into it!! The transmission gets all of the beating along with the torque converter which creates the heat. Get good parts like you would your motor. Did we have horsepower like this back in the 60's-early 90's? Hell no! I see street cars 500-1200HP running 8's-10's regularly. And driving to work and to cruises. I dig it! I'm new. Nice to meet you all. Hope the tips help.
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over 4100lbs w/driver (LEVIATHON)
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Drive anywhere-Priceless!

 

yea i plan on doin a full rebuild, but im not gonna be able to afford it till the first of the year... even then it irritates me because i didnt have this problem before the new converter went in.

 

what about driving a ss4000 around on a stock tune could this be causing any issues

 

Do you have hp tuners?

 

Anythings possible As I said the first thing is to see whats beng comanded. One thing to note the PCM will disable the converter if it see excesive slip but this should set a code, But until whats being commanded is determine all is just speculation

 

im home on leave right now but once i get back in az i will check up on that. its weird, it acted perfectly fine yesterday but once i got to the airport the trans temp was about 170* all of the sudden it wouldnt lock up and i had to give the car soooooo much gas just to get it going. this is scaring me.

 

Was it 170 or 270? Stupid question I guess, but hows the fluid level?