I was just wondering how much hp a stock 4l80e should hold? I geuss Im wondering if I should start saving my money for a build tranny. I was also wondering if I dont use a stall convertor does that mean its easier on my tranny?

 

there is no rating or real guess on this. i've seen them fail behind a completely stock truck and on the other hand go 10.91 with just a shift kit and converter such as jim did.

 

Well the based on what the name of the tranny means

80= 80 newton meters (that it SHOULD handle)

There is a conversion for this to ft/lbs.

 

Im hoping my tranny will stay alive with me runnin mid low 11's and waying in at about 4200 lbs.

 

I looked up the conversion factors (1 Newton = .22481 lbs. force and 1 ft = .3048 meters) and got a really whacky answer. 80 N/m = 5.4818 ft/lbs Even my slow pos could break that thing. Maybe i could do it with my hand...LOL .according to that calculation. Are you sure that the 80 stands for Newton Meters? The whole thing sounds kind of wierd. 5.4818 ft/lbs of max torque that it can handle? Is my math incorrect?

 

Wait i also found another conversion and its telling me that 1 newton meter = .7375622 lb force./ ft and the answer i got was 59.0050 and it is still really a low answer. oh well

 

If I could keep my truck running long enough to get to a dyno I could answer this question. Because I obviously have enough power to smoke the '80. Tonight makes the 3rd time I have broke mine. It lost all forward gears about 3 hours ago and had to be pulled home by a LLLLL I can't say it LLL....LLightning At least it was my buddy.

So, my estimate is 650 rwhp can break one.

 

i would start looking for some other cause. these things are tuff.

 

A turbo won't be as hard on the tranny as a whipple and spray

 

if this were true, V8's would have been in cars quite a while ago. th 4T65E in theory should have a higher rating than a 4L60E and be equivilant to a 4L65E in torque capacity.