Torque converter strange fault

[Alitis007]

Hi all, i have a 99 Ti with a 4.5 auto.

Last week i picked up my truck from the panel beaters and as i took off 1st to 2nd gear changed with a kick like it had a shift kit and when i took it on the highway the converter wouldn't go into lockup while i was accelerating, BUT if i set the cruse control at any speed over 80 the converter locks up!
I think it could have a suss TPS because i couldn't get a proper reading off it when i was trying to re adjust it for harsh gear change but that wont explain why it only locks up while the car is driving on cruse control.
Has any one else come across this??
Any help would be much appreciated. Cheers!!

[Alitis007]

Hi all, i'm having some strange dramas with my auto in my 99 4.5 auto after last monday i picked up my trol from the panel beaters it started shifting like it had a shift kit and the torque converter wasn't locking up at 100k's but if i used the cruse control it locks up. Has any one come across this fault before??? Oh and i just scanned the ECU and got code 21 turbine sensor in the auto DTC

[Alitis007]

Any one around melbourne have a good TPS I can try ?? This time of year is hard to find a wrecker thats open.

[NissanGQ4.2]

Hi mate, have moved you new post into your old one as they are the same problems.

[nissannewby]

Was any welding performed on the car while it was at the panel beaters? What extent did the panel beaters have the car disassembled to? It sounds like a wiring issue, all earths are good etc.

[Bigrig]

Was any welding performed on the car while it was at the panel beaters? What extent did the panel beaters have the car disassembled to? It sounds like a wiring issue, all earths are good etc.

I'm on the same train of thought as Matty (I think). If welding was done without disconnecting the battery it "may" have shorted out the lockup solenoid or worse ...

[Yendor]

Hi all, i have a 99 Ti with a 4.5 auto.

Last week i picked up my truck from the panel beaters and as i took off 1st to 2nd gear changed with a kick like it had a shift kit and when i took it on the highway the converter wouldn't go into lockup while i was accelerating, BUT if i set the cruse control at any speed over 80 the converter locks up!
I think it could have a suss TPS because i couldn't get a proper reading off it when i was trying to re adjust it for harsh gear change but that wont explain why it only locks up while the car is driving on cruse control.
Has any one else come across this??
Any help would be much appreciated. Cheers!!

I think you are on the right track.

If it was a problem with the TCM or lock up solenoid then it wouldn't lock up when the cruise was engaged either.

I not sure why it is still locking up when cruise control is engaged, it might have something to do with communication between the cruise control module and TCM???

Is it possible the TPS has water in it? I would check the wire harness for damage running to the TPS and check the main earths.

Also try disconnecting the battery for an hour.

[Alitis007]

Hi mate, have moved you new post into your old one as they are the same problems.

Thanks mate i couldn't find it when i looked for it yesterday cheers.

[Alitis007]

Was any welding performed on the car while it was at the panel beaters? What extent did the panel beaters have the car disassembled to? It sounds like a wiring issue, all earths are good etc.

All that was stripped was the bonnet, nudge bar and front bumper, it had only light damage.

[Alitis007]

I'm on the same train of thought as Matty (I think). If welding was done without disconnecting the battery it "may" have shorted out the lockup solenoid or worse ...

It locks up in CRUSE CONTROL.