what are the characteristics of a stall converter? my truck has a C6 in it and when ever i take off it dont have all the power but as soon as i hit a cirtain rpm its like a kick in the rear. also when i take off from a stop goin slow like pulling out of my drive way, i give it some gas, nothing, more, still nothing, then it finally starts to chug on out. also when im in my back yard with it goin over rocks and stuff if i dont get on the brakes as soon as it starts to roll backwards it dies like its a manual.

 

I am not a tranny expert and it would probably take a book to explain this completely, but...

A stall converter is a torque converter that has a higher stall speed than the stock converter, usually there are other mods to handle the power and heat generated. The higher stall speed allows the engine to get into it's powerband and takes advantage of torque multiplication within the converter.

A stall converter is NOT what you would want for an every day work truck. Instead of power down at low RPM, you would have to get the engine up to near the stall speed before you got good rersponse. I once had a 3,600 RPM stall on a car, and it was a PITA to drive in rain.

Your truck may just have a tired tranny or converter, or even fluid.

What RPM does your truck seem to take off at? A normal stall should be down around 1000-1500 RPM I would GUESS. Your truck should be able to hold on a hill or start creeping along in idle. This assumes your idle speed is set properly, I do not know wwhat RPM yours should be since there is very little info on your rig. I would wild guess an idle around 700RPM more or less.

Even with a stall converter you should have some acceleration at low RPMs and gradually getting more "authorative" as you got into the powerband. I almost think your clutches are going. Normally you will not have a sudden kick in the pants, just mushy throttle response until you hit near the stall.

Stalling as your truck rolls backward is an interesting problem. I would guess your idle is too low.

Good Luck,

Jim Henderson

 

that is how it is exactly, i have some around 1000rpm but very little it will fianlly start moving around 12 and i can chug out of the drive way, then i still have crappy acceleration then i hit about 1500-1600 and it strats going good and only gets better from there. the fluid is fine and the tranny was rebuilt in 2000 at the same time the engine was.