4L80e output shaft

[ziembic]

I was talking with Mark (Quickstop) about converting my 2wd 80e to 4wd. From what I have found there are several different length output shafts for different applications. It looks like there are 3.75" and 5" variations of the 4x4 output shaft, and not that it matters too much to us, but 7 7/8", 8 1/8 and 9" for 2wd. I didn't measure mine, but it was pretty long. Does anyone know what length their output shaft was when they did the conversion? My trans guy is waiting on this measurement in order to start assembly.Just to be clear, I am not looking to re-spline this shaft, since I have the conversion shaft for the transfer case.

 

[Quickstop [UK]]

Re: 4L80e output shaft

Did you see this?

http://www.syty.net/forums/showthread.php?t=65953&highlight=spline+length

 

[Quickstop [UK]]

Re: 4L80e output shaft

Jeff, I know via PM that you got this sorted. Did you also have a question re: the spline engagement length? I am sure I saw a picture a couple of weeks ago...

:dunno:

 

[ziembic]

Re: 4L80e output shaft

No I think it was someone else. My trans builder had a 4wd shaft laying around.

 

[mattw]

Re: 4L80e output shaft

That was me.. I must have the shorter 3.75" output shaft. I put it all together anyway.. We'll see how it holds up. This is how much engagement I had.. I was 1.326"

I suspect that this will be fine with my current(very limiting) shortblock build. Once I swap that out for a built shortblock and turn up the boost I suspect I should also install the longer output shaft for more engagement..??

 

[Quickstop [UK]]

Re: 4L80e output shaft

Hi Matt, yes, that is the one I was thinking of. I did a fair bit of searching to try and learn more about it but it's actually remarkably involved so I had to give up.

How much depth is left in the input shaft? That looks very similar to mine. I'll measure it all this week hopefully.

 

[JSM]

Re: 4L80e output shaft

If you have 1.5 times depth as diameter you will have max strength available. Anything further is just bragging.

 

[mattw]

Re: 4L80e output shaft

How much depth is left in the input shaft? That looks very similar to mine. I'll measure it all this week hopefully.

A fair amount. I bet the 5" shaft would be about perfect..

If you have 1.5 times depth as diameter you will have max strength available. Anything further is just bragging.

Thats good to know.. Does anyone know the diameter of the stock 4x4 4l80E output shaft?

 

[Quickstop [UK]]

Re: 4L80e output shaft

http://www.syty.net/forums/showpost.php?p=1009659&postcount=23

That doesn't give the diameter of the 80e shaft but it does describe the dimensions of the input shaft. The outside diameter is 1.750" so at a guess, the internal diameter of the splines is around 1.25"... so the wall of the metal is .250"?

The depth of the input shaft is 2.5".

According to Jeff, if your shaft penetrates 1.5 X 1.25" = 1.875" then you are all set... Looks from that picture that you have 1.5" or more... Can you measure it?

I'm looking for technical info on a 4l80e shaft and will update it unless someone else does. Or measure the dimensions next week. Whoever built the input shaft should have that info to hand.

 

[mattw]

Re: 4L80e output shaft

can you measure it?

1.326"

 

[Quickstop [UK]]

Re: 4L80e output shaft

I just assumed that the transfer case input shaft would be measured correctly for an 80e output shaft.

I am a little confused here...

I just got out my old, twisted, GB shaft which was a 4l80 cut down to mate with the stock Typhoon transfer case.

The length of the splined part is 3" and this is the same as the replacement I got off eBay.

The old shaft has actually twisted. You can see that there is about 1.5" of engagement where the splines are twisted. This was inside the stock Borg Warner input shaft.

The new input shaft from SpeedInc.com is definitely a bit longer than the old stock Borg Warner shaft. So there is more engagement. I am not sure sure it is a complete inch but it is definitely more, probably more like .5".

The length of engagement on the new shaft should be up to 2.5" but it is definitely more than the stock Transfer Case shaft. See the diagram from STOUT74:

So if there is an extra .5" inch on that shaft then there should be at least 2.0" of engagement.

Matt, where did you get yours from? Is yours all together now or can you measure the depth of your female end on the TC input shaft?

What am I missing?

 

[mattw]

Re: 4L80e output shaft

Matt, where did you get yours from? Is yours all together now or can you measure the depth of your female end on the TC input shaft?

My x-fer case input shaft came from the JSM group purchase.

The output shaft of the tranny was in it when I got it. It came from a 4x4 truck.

It is all together now so unfortunately I can not take measurements. There was definately room for another 1.5 - 2" of shaft to slide into it..

 

[Z SKI]

Re: 4L80e output shaft

I have one of the 4x4 shafts in my trans and Jeffs transfer case input shaft.. I will get you guys some engagement measurements this weekend before I install my motor and trans.. If my polish memory serves me correctly I think I had like 1.5" of engagement last time when I checked.. More to follow...

 

[djsy934]

Re: 4L80e output shaft

The new input shaft from SpeedInc.com is definitely a bit longer than the old stock Borg Warner shaft. So there is more engagement. I am not sure sure it is a complete inch but it is definitely more, probably more like .5".

The reason the Speed Inc shaft and Mark Williams shaft is longer is because of the adapter plate required. When we designed our one piece adapter it was to keep with input shafts available. Turning down the output shaft is a bad idea, it gets you out of the heat treat area and into soft steel and reducing diameter. This is also the reason we feel it is not a good idea to re-spline a stock input shaft.
In a perfect world, we would also increase the O.D. of the input shaft ( where splined ) and put a larger bearing in the T-Case. But this has not been a failure point yet.
After giving this further thought, there is less spline engagement if you turn down and re-spline the output shaft and use a the stock input shaft.The thickness of the adapter is not taken into consideration.
On Lens truck (STOUT74) we made his adapter shorter to give him more spline engagement. We didn't do this with all the other adapters because it would move the tranny mount forward and the RPM and other crossmembers would not match up for the mount.

 

[Z SKI]

Re: 4L80e output shaft

Hey guys... Got my trans installed today and before I started bolting stuff together I got some spline engagement measurements.... I have 1.66" of engagement... This is with a stock 32 spline 4x4 shaft, Jeff Scott 32 spline x-fer case input shaft, Stout74 adapter bracket, and a stock GM trans to x-fer case gasket..

 

[mattw]

Re: 4L80e output shaft

This thread kinda died. I suspect a lot of us are running around with the short 4x4 shaft and very little engagement. Has anyone ordered and tried the shaft outlined in this image yet?

Also, has anyone else twisted and/or broke the short 4x4 shaft like Mark did?

 

[Quickstop [UK]]

Re: 4L80e output shaft

I have been meaning to ask Frank (autoaddictions) - he said he had a GB output shaft which was where I got mine from so I would assume that his was warped to all hell.

I think the 6 1/2" shaft, with a cutout would be great for us. The 3" one is too short IIRC.

I use the twisted one for a paperweight. Just like my truck

 

[Quickstop [UK]]

Re: 4L80e output shaft

Well, I am bored and have a job now and decided to buy the 2WD shaft with the 5" splines on it so I can mess around with it. Might take a while but I'll let you guys know how it works out.

 

[Quickstop [UK]]

Re: 4L80e output shaft

My trans is a 96 so I ordered a shaft with no lube holes. Prob going to be a while before I actually get to the trans. :dunno:

 

[Quickstop [UK]]

Re: 4L80e output shaft

More surprises... The shaft I got is the same length as the one I got from Blake and it never was long enough. According to his directions, it should have stuck out by 5/8" so God only knows where this came from... You can see it is flush. I'm surprised it didn't snap off sooner.

No matter, I'm going to cut the 5" shaft down. Should be fun!