Man I hate hearing of broken 4l80e tranies. I guess anything mechanical can break though good luck removing and replacing the trans at least youre builder seems to be an honest one.

 

ya the truck was running like a **** when it happened,

 

This what happend pretty much in my last trans..i had 1st..2nd would barely grab and 3 and 4 were ok..the cage of the sprag was busted

 

I win, bitch.

 

Where did you get that tranny jack??? I like it, I have been looking into buying one...

 

My girlfriend bought it for me for Christmas. Harbor Freight. Pretty cheap too.

 

Was it a stock 4L80? What are you gonna do to it now?

 

It was a stock 80E with upgraded clutches I think. It's getting the beefy (expensive) intermediate sprag kit this time around.

 

How much RWHP is an 80 with clutches and a band capable of handling?

 

This one was supposed to be good to 900rwhp. I think the 1-2 shift was set too firm, which is what causes the intermediate sprag to break or roll over. Probably would have been just fine with a softer 1-2 shift. I was reading last night that in 1st gear the intermediate sprag is traveling at 84% of the input shaft RPM, in the opposite direction. On the 1-2 shift it has to bring a 14 lb drum to a complete stop in a fraction of a second. When the 1-2 shift is too firm (too quick) you are counting on a small sprag to do too much.