Stall Torque Converter

[Straight6]

Can someone explain what a stall torque converter in a transmission is and how it works?

 

[fordfanatic75]

Can someone explain what a stall torque converter in a transmission is and how it works?

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well first of all. all torqe converters have a stall, that is what alows you to stop your truck in gear and it not **** the motor! Now you can buy a high stall, which is exactly what it implies. it mearley engages at a higher rpm, for instance, the average is around 12- 1,700 rpm when it engages and begins to put power through the trany,by puting in a higher stall it would allow you to make the engine rev higher before it hooks up giving you a more dramatic launch. this isn't something recomended for a wheeler! i actually put a lower stall in mine, becouse when your going down a steep hill it holds the truck slower cause it hooks up earlier. if you have ever watched drag racing, and you hear them racing the engine just before they take off, then they take off very harshley, thats the stall kicking in.and you can order a stall for almost any rpm, from stock -3000 rpm and up. imagine your broncos' motor reving to 3000 and then the converter locks up tight and launches the truck! WOW! )

 

[BLADE262US]

I agree with you totally on that explaination fordfanatic75 You should also mention that if your building a motor you have to pay attention to the cam specs if it doesnt start making power till 2500 rpm or so you need to add the extra stall to get it in the power range before it hooks up . And yeah you can use a 3000 stall convertor in a street driven truck I had one in my bronco 2 with a 351W it was a TCI street fighter to be exact you put that thing to the floor and the 32x14.5x15 mickey thompsons were just smokin shifting between gears under acceleration would bust em loose again all the way to 3rd it was alot of fun but not for an offroad application but if its a street driven toy then its all good . /emoticons/[email protected] 2x" width="20" height="20" />

 

[Justshootme84]

Yeah, that is a good explanation. With your idle at 1000 rpms most stock TC have a stall speed of 1500-2000 rpms. You can feel this when you give the motor a little gas, and the truck takes off. This is adequate for a street truck, daily driver, or trail rig that has it's powerband from idle to 5500 rpms. When you get into the more radical cams, higher horsepower racing engines, you may need a stall speed of 2500-3000 rpms. This allows the engine to spin up to speed/rpms, so that when the TC stall speed is exceeded and the tranny is hooked up, the engine is into it's power band. The TC does this thru friction and flow of the tranny fluid thru fins on a central hub, called the stator. You also have some slippage in the automatic tranny when power is apllied from the TC.