Trans Brake and TC stall speed

[Airborne2000]

kinda of simple question.... if you have a trans brake do you Need a high stall TC?

i only ask because i really dont want to daily drive on anything abouve 3K stall but would like a 4k + launch at the track.

 

[8306gt]

kinda of simple question.... if you have a trans brake do you Need a high stall TC?

i only ask because i really dont want to daily drive on anything abouve 3K stall but would like a 4k + launch at the track.

You need a convertor that is set up to stall at the rpm you want to leave. I don't understand the issue you have with not wanted to drive around with a convertor that stalls above 3000 rpm. Once the clutch locks up it act just like a stock convertor and it's not like the car won't move with anything less than the stall rpm. My car is my daily driver and I run a 4200 rpm Circle D convertor with no negative effects.

 

[Steedman07]

Do you have a stock tranny?

 

[8306gt]

Do you have a stock tranny?

I assumed he either had or planned to get a 4R70W since a brake isn't available for a 5R55.

 

[Airborne2000]

Yeah stock right now, well a PA high performance 5r55s with a stock converter. I am asking because I want to swap to either a 4r70w or do the t56. im very back and forth on it.

8306gt, I used to have a 3000 stall in my car (keep in mind it was a pos) but at times like if I was approching a red light and slowing down then the light would change to green when i would go to accelerate the engine rpms would raise a good bit before the TC would catch almost like i was flashing the TC but i was not. but maybe it was just a because the TC was crap.

 

[dysan]

I have a 4r70W with a 4000 stall precision converter and a 10" PI lockup converter and there's no issue driving around with it at all. When I'm driving normally it's no where near the 4000 stall since the stall is dependent on the power you're making. Also, like others have said if you get a lockup converter then once you lock it up the stall doesn't make a lick of difference.

 

[kbchevlvr]

with a trans brake applied.....you are manually engaged in first gear, and electronically engaged in reversed (while pressing button). when u release the button, reverse drops out and forward progress happens. its like a nuetral slam. the convertor is going to limit what max rpm your launch can be. with that said convertor "A" might stall 3000 rpm behind a car with a stock motor, weight, gear and tire. but that same exact convertor behind a car with a blower, 4.10's and slicks might flash 3500.

here is why you cant spend enough on a GOOD convertor. i personally have a TCI 3000 in my wifes car. i am extremely happy with the performance of this unit based on its cost compared to the higher $$$ brands like circle-D, or precision. the TCI literally drives looser on the street than my 8" 5500 ATI MRT convertor in my 9 sec race car. but a friend of mine has a 3500 precision in his 05 gt and it drives basically like a stock convertor. if you didnt know he had it in there, you probebly wouldnt know to drive it around town.

moral...save your pennies if you need to, but get a good one if street driving is a concern. have a company build you one. the TCI unit does cause extra heat on the street (not horrible, just a characteristic of a "loose" convertor). Heat = trans failure.