drive shaft??

[mooseknuckles]

just wondering what I would need for a yolk for my 4l80e? is it the same as a th400?....and how much longer is the 4l80e trans than a 700r4 trans?

[code4]

Originally Posted by mooseknuckles

just wondering what I would need for a yolk for my 4l80e? is it the same as a th400?....and how much longer is the 4l80e trans than a 700r4 trans?

yes, same as t400 as far as spine. not sure how much longer it is.

[83 Silverado]

If you go on the TCI trans site you can find a chart with the langths http://www.tciauto.com/tc/trans-dim

[mooseknuckles]

cool link thanks man.

[nacho55]

After you find out the spline count and length you need hit the junkyard as I found tons of good ones at my local pickapart when I was scrounging for my driveline setup, even with having it shorten and re-balanced I have less than 150.. you almost can't get a yoke for that. And those are the big 32spline ones that are pretty tough and most of the ones I found were like new or just had a little surface rust that comes off with steel wool or sandpaper.
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[mooseknuckles]

Originally Posted by nacho55

After you find out the spline count and length you need hit the junkyard as I found tons of good ones at my local pickapart when I was scrounging for my driveline setup, even with having it shorten and re-balanced I have less than 150.. you almost can't get a yoke for that. And those are the big 32spline ones that are pretty tough and most of the ones I found were like new or just had a little surface rust that comes off with steel wool or sandpaper.
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think its a 32 spline...how do I find the length?

[nacho55]

Not sure but if it's like the one use which was out of a later truck it was 4-5" if I remember there's not alot of differnt sizes so you can't go to wrong if your a little long. The yoke can be shortened too. but the important thing is that when you install the yoke into the transmission you have 3/4" to -1" of travel for the yoke to slide in and out. That's how the driveline shops measure for it so it doesn't bottom out. Do you have a drive shaft your trying to use or? If not just find the yoke and start from there.
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[clinebarger]

Are you using a bolt-on yolk or a slip yoke?

[mooseknuckles]

Originally Posted by clinebarger

Are you using a bolt-on yolk or a slip yoke?

slip yolk...I don't have anything right now.....

[nacho55]

Moose,
Are you planning on buying new yoke and getting a driveline built? If your searching for yokes new try to match it with the same size ujoint that your rear takes it will save you the trouble of having two different ones when it comes time to replacing ,
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[mooseknuckles]

Originally Posted by nacho55

Moose,
Are you planning on buying new yoke and getting a driveline built? If your searching for yokes new try to match it with the same size ujoint that your rear takes it will save you the trouble of having two different ones when it comes time to replacing ,
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yeah...gotta buy one..apparently there's 3 or 4 different ones, and I can't get an answer on anything..I'm using the stock two piece driveshaft so it may have to be shortened.....

[clinebarger]

Originally Posted by mooseknuckles

slip yolk...I don't have anything right now.....

Ive never seen a 4L80E have a slip yoke, Unless someone put a TH400 output shaft in it.....Use a Bolt-on yoke....You already have a Slip Yoke in your drive shaft (circle)

[mooseknuckles]

...so where do i find one of those?

[Gordonr1973]

http://ls1tech.com/forums/automatic-...uestion-2.html

Here is some more conversation regarding this ... and I'm not yolking either!

lol!

[Gordonr1973]

Not really sure either what I am going to go with, just didn't like the driveshaft shop quoting me $500 to build me a new drive shaft from scratch!

A few more links, not sure which applies to your situation with the two-piece.

http://www.chevyhiperformance.com/te.../photo_01.html

http://www.ebay.com/itm/NEW-DRIVESHA...sories&vxp=mtr

http://www.summitracing.com/parts/IED-SY-400-1310

http://www.performancetrucks.net/for...o-i-do-486687/

http://www.chevyhiperformance.com/te.../photo_01.html

[Dustytrix]

I have a bolt on type that has the u-joint bolt on clamps. They are missing tho, let me know if you think you can use it.

[usmcchevy]

Not that it means anything, but my 4L80E came with a factory slip yolk.