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Discussion Starter · #1 ·
I am wondering if I need a torque converter as well, when I do my tranny rebuilding & repairs? I just put one in when I built the truck cause the gear on the old converter had some missing teeth.
I dont know what the stall speed rating of it would be, I got it as a "rebuilt stock" unit for about 50 bucks so it aint that old (or probably that good either), does anyone know stall ratings of stock versus what I could/should use for rock crawling at low to medium engine RPM ranges *approx 700 to 2500 rpm* maybe a bit more at times but mainly just above idle type of driving? If im gonna cough up bucks for one of them good ones I gotta know its worth it for my needs. anybody? anybody?
 

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you want as much power as your engine can get through the driveline at the lowest engine speed available, especially for rock crawling. With minimum slippage and not killing gas mileage or the engine, I'd say you should safetly run a 1200-1400 rpm stall. Just my opinion though, I'm sure there is someone on here with a better one, just not at 1 am :)
 

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Stall speed is nothing more than the rpm which the torque convertor effectively transmits power from the engine to the driveline. If you had a race car that you wanted to launch down a drag strip, you want the tranny to lock up at a higher rpm to launch the car, like dumping a clutch. A high stall TC can allow this. However this is not what you want for a 4wd travelling over rocks. You want TC that can multiply all of it's torque at low rpms so that you can crawl. A stock TC or an RV type TC will work best. Remember that the more a TC works, the more heat it generates. Don't forget to add a really good tranny cooler with it's own dedicated electric fan. It will also help to install a real spin on filter and a deep sump tranny pan, to keep the ATF clean and cool.

Ed
 

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DM you have a stock motor?

You run in low range ?


If you answered yes to either of those questions then leave it alone.
 

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I think he is asking because he fried the tranny last week or so. If you are rockcrawling you are making a lot more heat than if you were driving on the highway. Look for a tranny cooler off of a diesel or tow truck. The one I have is as big as my radiator and half as wide. I don't have an electric fan though, just the clutch fan and stock shroud.
 

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dodge8564 said:
I think he is asking because he fried the tranny last week or so. If you are rockcrawling you are making a lot more heat than if you were driving on the highway. Look for a tranny cooler off of a diesel or tow truck. The one I have is as big as my radiator and half as wide. I don't have an electric fan though, just the clutch fan and stock shroud.
Oh then in that case if you don't have a factory stall converter then that is why you burnt up your trans, a non factory stall means you must keep up those rpms or the converter slips and then it makes more heat.
 

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Discussion Starter · #7 ·
ya thats why im asking, the converter is was bought as a stock remanufactured unit, i guess that means stock stall speed, i was wondering if they come lower than stock or what?
 

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I think you can get a TC that is like real low in the idle range almost but i can't remember what it was in, you could call and get it made for TC's i use http://www.dynamicracingtrans.com/
 

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I think you can get a TC that is like real low in the idle range almost but i can't remember what it was in, you could call and get it made for TC's i use http://www.dynamicracingtrans.com/
 

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Hey DM check out these
www.tciauto.com/truck/truck_converters.htm

I also would do some of the easy mods to extend life:
shift kit
5.0 kick down lever
deep pan
Heavy duty intermediate band strut
Big tranny cooler
 

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What's the stall speed of the stock non-lock up converter?
 

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Discussion Starter · #12 ·
Bogie said:
Hey DM check out these
www.tciauto.com/truck/truck_converters.htm

I also would do some of the easy mods to extend life:
shift kit
5.0 kick down lever
deep pan
Heavy duty intermediate band strut
Big tranny cooler
Ok, i know about the shift kit, the deep pan, the heavy duty bands and tranny cooler, but whats the 5.0 kickdown lever?
 
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