In more depth whats a stall converter do and how it works

[96_4.6]

I have the basics of how a stall converter works cause I'm not familar with this mod but come to find out I had my trans rebuit last week and they found a 3000 rpm stall converter and they rebuilt that too along with everything else. So the guy before me who had this car put a 3000 rpm stall converter on a stock 96 gt, I dont see why but oh well I put some mods on and now a stall converter too so I'd like to know more in depth whats the advanages and how it works. Thanks.

[Dark_5.0]

HMMMM...

Hold the brake pedal down with your left foot.

Rev the car up to 3000 rpms with your right foot.

Release the brake pedal and nail the gas pedal simutaneously.

Yep,

[96_4.6]

Thats pretty much what I meant when I said I know the basics...

[Dark_5.0]

Well I tried

[blue00gt]

A stall converter is a viscous coupling that you could compare to a clutch as far as what it's function is. As the engine rpms come up, it allows less and less slippage until it reaches full lockup at the stall speed - at that point it's like having the clutch all the way out. I don't know how it actually works inside. All automatics have and need them because otherwise you could never get the car going from a stop. The idea behind having a higher rpm stall converter is the same as slipping the clutch off the line to get a better launch - keeps the engine from bogging and allows it to get into the powerband quicker. It is actually a good mod for even a stock auto stang, especially modular motored stangs because they have less low end grunt than the pushrod 5.0s so they are harder to get out of the hole quickly.
You just wouldn't want too high of a stall on a street car because if you are trying to cruise with the rpms below full lockup then it is always slipping and you are wasting gas and power and generating excess heat.

[TARZAN]

Yeah, he basically said it.....its basically your clutch, and the more power you have, the higher its gonna flash.....

And IMO, a Lock-up style is more streetable

-Will

[96_4.6]

Originally posted by blue00gt
You just wouldn't want too high of a stall on a street car because if you are trying to cruise with the rpms below full lockup then it is always slipping and you are wasting gas and power and generating excess heat.

So does that mean my 3000 is bad, I mean it already was on the car, I have 4:10's so I'm at 2000 alot just going 50 so I'm wasting gas?

[TARZAN]

I have 4.10's, a 3200 stall, a custom made shift kit, and a tranny cooler in my car......

The only problem I could actually see you having is the tranny getting hot during the summer. A cooler would help you out alot, and they aren't very expensive.......

But, no, you are not wasting gas, unless you just could care less about the performance....but if you have 4.10's in your car, that is most likely your MPG problem

But no, a 3000 Stall should be just fine, especially if its a lock-up

-Will

[91LX2Bfast]

Which brings up a good point:
If you have an auto equipped Mustang (or T-bird, wink-wink), you SHOULD be running an auxilary transmission cooler.
From a wise man: "Almost all clutch friction failures are due to heat. Put on a good external transmission cooler. The best type of cooler to run is the plate design, not the fin and tube type. Have to external cooler plumbed in after the cooler in the radiator.......For every 20 degrees of increase in transmission temperature over 170 F, the life of the fluid is cut in half......If manufacturers put good coolers on production cars, they would put most tranmission repair shops out of business."

[96_4.6]

I think I know why my tranny went at like 74,000, I bought the car with 69,000 2 years ago and I had a nasty happen of manualy shifting the car sometimes and when I come to a stop at about 30mph I would downshift to second to hear that awesome wind down with the flows.....I'm stupid but used to drive a stick and I miss it

[91LX2Bfast]

A wise man once said: "On a '96 and newer 4R70W's, you can do all the manual 1-2 and 2-1 shifts you want and not hurt anything......stay away from excessive manual 4-2's on all transmissions older the 1998."
So you're probably right about that one.

If you want to learn everything you need to know about your 4R70W, check out this link and click on "Ford OD Transmissions 101 - Jerry's mod."

[96_4.6]

How wise is this man lol SO its cool for the 1-2, D(3rd)-2 manual shift every once in awhile