Anyone know how to Identify a lockup from a non?
how do you determine stall speed?

thx


jeff

 

I don't know of any way to determine that just by looking. Stall speed is determined by the pitch and number of turbines inside the converter and the lockup function is provided by a friction material inside the converter as well. The best analogy of a torque converter that I have heard is; think of two fans facing each other. When you turn one fan on, the other starts to spin too. The faster you spin one fan, the faster the other starts spinning. Now add more blades and provide more pitch and you will make more air flow. This is exactly how the converter works, except with fluid instead of air.

 

The true stall speed of a converter will vary from engine to engine. The only way to find the true stall speed is with a transbrake.

My converter behind my old engine stalled at 5700 rpm. Behind my new engine it stalls at 6100 because the new engine makes a lot more torque. Same converter, different stall speeds.

Just by looking at a converter, there is very little you can to to identify it. If you're lucky and it's an aftermarket converter, there may be a manufacturer name and part number on it which will help. If not then it's just a guess.