please help fast

[V6cious]

My mom has had her transmission built in her 99 gs for some reason the torque converter would not lock up after tranny people took a look at it they said that it needed a rebuild so now after 1800.00 dollars and 15,000 miles later the torque converter has stopped locking up again. now I know a little but not alot about transmission the shop said that it would take 1000.00 dollars to fix it again does anyone here know about these transmissions trans shifts perfect but just will not lock up.

 

[FastRegalWE2]

may just be a bad TCC solenoid. (Torque Convertor Clutch)

 

[TurboShane]

I don't know about a 99 but my 94 gs had the same problem, well so did my TR it just as simple as getting on you back and adjusting the switch at the top of the brake pedal. There should be not sure on the 99's but there is a little switch the get's pushed out just push it back.

 

[FastRegalWE2]

yeah thats the TCC switch that tells the PCM that you are stopping and unlocks the TCC

 

[V6cious]

is there anyway to test the tcc solenoid and does anyone have an idea if the 99 gs have the switch on the brake pedal

 

[TurboShane]

Just look pretty simple to see if it's there or not. It should be on the back side of the shaft of the brake pedal near the top.

 

[TORQUED]

Someone needs to see if the PCM is commanding the torque converter to lock-up or not. This is done through a scan tool.

This will give an idea of which way for the diagnostics to go.

If the PCM is NOT commanding lock-up, things to look for are (as mentioned) brake switch input (also read on scantool), TPS, coolant temp and vehicle speed.

If the PCM IS requesting and not receiving lock-up, then the TCC circuit needs to be ohmed out. The resistence should be about 30 ohms for the apply solenoid, not to be confused with the PWM (pulse width modulated) solenoid. The PWM solenoid is a duty-cycled solenoid commanded by the PCM to "dampen" both the engagement and disengagement of the TCC.

If a bi-directional scantool is used with the capability to command the TCC and PWM solenoids, then you can command them on and off and listen for the "click". Sometimes the solenoids fail mechanically, which would prevent TCC operation.

Did the MIL (check engine light) come on?