4l80e ecsb driveshaft

[EmmerichLSx]

I've been trying to research what to do about a driveshaft for my 4l80e swap. It's got a 2 piece right now and was thinkin I was gonna go to a 1 piece but I'm still really confused about what I should do. Stay stock, custom build, 1 piece 2 piece, 2500hd blah blah blah. I'm just kinda confused with this one.

[Oldspimp]

I dont know much about the 4l80 swap but if your lowered from what I hear its better to run a 2 piece to help with vibrations from pinion angle issues. Maybe you could have the front shaft shortened

[kerrige]

Keep the 2 piece it will have a much higher critical speed allowing you to go faster. The 80e is actually only slightly longer than the 60e so I think many people just end up cutting the output shaft down a little bit and it ends up fitting.

[EmmerichLSx]

Hmm yeah that's what I was mostly worried about was critical speed.

[dropem]

Don't switch to a one piece they wont be as strong as a two piece due to the length. You can use your stock drive shaft you will just need to have a short turbo 400 slip yoke welded on. Also I would not shorten it any, I did on mine be just a 1/4 but now it is out to far for my comfort.

[EmmerichLSx]

Don't switch to a one piece they wont be as strong as a two piece due to the length. You can use your stock drive shaft you will just need to have a short turbo 400 slip yoke welded on. Also I would not shorten it any, I did on mine be just a 1/4 but now it is out to far for my comfort.

Ok so get a short th400 slip yoke and have the stock u joint welded on?

[kewljay223]

im lowered 4/6 and kept my 2 piece and had to shorten the front an inch or so.... but i have a 95, you have a different body so im not sure if you would have do. im super happy with it.

[EmmerichLSx]

I found this on pt.net:

Here is the part #'s you need to retain your stock driveshaft and bolt to the 80e (courtesy of superado):

Neapco N3R-3-9161X
Precision Premium #534G

[dirt track racer 81]

I used a long yoke that retains the factory u-joints. I just had to cut the yoke down to where it doesn't bottom out inside the transmission. I'm spraying around a 300 shot of nitrous off the line and had no issues..

[EmmerichLSx]

I used a long yoke that retains the factory u-joints. I just had to cut the yoke down to where it doesn't bottom out inside the transmission. I'm spraying around a 300 shot of nitrous off the line and had no issues..

Damn that good to hear. Sorry I am new to the driveshaft subject. So you're using a cut down yoke from say a 3/4 ton but you're using the factory u joint that came on your 2 piece driveshaft?