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usp55 · 05-11-2009, 07:29 AM

this is exactly what my car is doing, has to be the TCC.

"The TCC is made to engage usually only in the top gear when the car is cruising, not accelerating. The lock up converter will disengage when the accelerator is pressed hard enough. Over time the clutch will wear out especially if the vehicle ever towed anything and was left in overdrive (top gear). This will wear the clutch out prematurely. If you have a tachometer you will see the RPM’s drop a few hundred when it engages. If the TCC is bad one of three things will usually happen. First, the vehicle will tend to rev up and down as it engages and disengages, not being able to keep the converter clutch locked up. Second, the converter clutch will engage randomly in gears that it shouldn’t even engage in usually. Third the clutch doesn’t want to disengage. As you slow down the vehicle won’t downshift and if you try to accelerate the RPM’s will be so low that the vehicle will have difficulty moving quickly. In extreme cases the lockup converter will try to keep the vehicle moving as you try to stop at a stop light, or will stall out and die. Many people think that this problem is coming from their engine because it causes the car to stall. The check engine light will not always show an error for the TCC. Most lockup converters are controlled by a wire or wires that plug into the transmission. It is possible on some models to simply disconnect this plug. This is not a problem and will only cause you to lose a little gas mileage. The RPM’s will run slightly higher than before but will not harm anything or be an issue."

how exactly is the tcc fixed? is it internal?
i recently have a full rebuild, stall, and shift kit done to the car so im gona take it back to the shop but im curious as to what actually needs to be done to fix it. mechanical? electronic? needs adjustment?

05-11-2009, 07:29 AM	#5
usp55 Join Date: Oct 2007 Location: Sewell, NJ Posts: 1,044 iTrader: (2)	this is exactly what my car is doing, has to be the TCC. "The TCC is made to engage usually only in the top gear when the car is cruising, not accelerating. The lock up converter will disengage when the accelerator is pressed hard enough. Over time the clutch will wear out especially if the vehicle ever towed anything and was left in overdrive (top gear). This will wear the clutch out prematurely. If you have a tachometer you will see the RPM’s drop a few hundred when it engages. If the TCC is bad one of three things will usually happen. First, the vehicle will tend to rev up and down as it engages and disengages, not being able to keep the converter clutch locked up. Second, the converter clutch will engage randomly in gears that it shouldn’t even engage in usually. Third the clutch doesn’t want to disengage. As you slow down the vehicle won’t downshift and if you try to accelerate the RPM’s will be so low that the vehicle will have difficulty moving quickly. In extreme cases the lockup converter will try to keep the vehicle moving as you try to stop at a stop light, or will stall out and die. Many people think that this problem is coming from their engine because it causes the car to stall. The check engine light will not always show an error for the TCC. Most lockup converters are controlled by a wire or wires that plug into the transmission. It is possible on some models to simply disconnect this plug. This is not a problem and will only cause you to lose a little gas mileage. The RPM’s will run slightly higher than before but will not harm anything or be an issue." how exactly is the tcc fixed? is it internal? i recently have a full rebuild, stall, and shift kit done to the car so im gona take it back to the shop but im curious as to what actually needs to be done to fix it. mechanical? electronic? needs adjustment? __________________ 1971 Firebird Project Last edited by usp55; 05-11-2009 at 09:42 AM.