4l80e Gurus HELP!!

J-bird

J-bird

Member
I'm in the process of swapping a 4l80e into my ty. I have a late model (1998) 4X4 4l80e, tci controller, and the swap kit that I bought form 1BADV6.

I also have started collecting parts to rebuild the trans myself. The problem is that the kit I have has the early model output shaft and I need the late model shaft. Is there a way to modify the early shaft to work in my late model tranny. Or is there anyone out there with a late model shaft needing a early one that would consider a trade?

Any information would be a great help!!

Thanks,

Jeremy Franke
 
J-bird

J-bird

Member
Re: 4l80e Gurus HELP!!

I'm not real sure what the difference is. I was unaware that there was a difference until this morning when I read it in the instructions I got with the kit.

I have the tranns pulled apart I'll do a closer inspection and take pictures when I go home for lunch in a few minutes.

Thanks
 
1

1BADV6

Donating Member
Re: 4l80e Gurus HELP!!

Jeremy,

Here is something I found in one of my emails from George. This explains the differences in the shafts. Looks like you will need a shaft without lube holes.

George Blake wrote:
Now. If you have a 1996 or OLDER (lube line ports right next to each other), you MUST have an output shaft that HAS 2 LUBE holes in it. I should probably put up some pics.
If you have a 1997 or NEWER trans you want an output shaft with NO lube holes in it. The 1997 or newer trans has the lube ports approx 10" apart.

Hope this helps,
 
JSM

JSM

Active member
Re: 4l80e Gurus HELP!!

I am fairly certain you can plug/adapt one shaft to anther version.
 
mattw

mattw

Active member
Re: 4l80e Gurus HELP!!

Is it just the 4 holes on the flat part that need to be plugged?

P1010016.JPG
 
JSM

JSM

Active member
Re: 4l80e Gurus HELP!!

Its on the side where the bushing rides. I am not an internal trans expert though.
 
J-bird

J-bird

Member
Re: 4l80e Gurus HELP!!

TwinTurboV8Ty said:
Its on the side where the bushing rides. I am not an internal trans expert though.
Click to expand...

yea, its on the side of the shaft

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I was thinking that the hole was the only difference. Do you think that this can just be plugged and how? I was thinking I could carefully weld the holes shut below the surface of the shaft or from the inside, but the shaft has been cryo treated. Good old JB weld maybe??:lol:

Thanks,

Jeremy Franke
 
JSM

JSM

Active member
Re: 4l80e Gurus HELP!!

I am 99% sure George posted a how to, I believe it involved just a press fit plug.
 
J-bird

J-bird

Member
Re: 4l80e Gurus HELP!!

Also,

Just a thought and may be totally off base here, but if the intermediate shaft is not hollow there would not be any pressure on the lube holes of the output shaft. wold the holes even make any difference? I assume they would as there were two different shafts manufactured!

Thanks
 
J-bird

J-bird

Member
Re: 4l80e Gurus HELP!!

Just an update!

I talked to the guys over at PACT and they said in this situation they would weld the holes form the inside of the shaft, just don't get it too hot.

I had some time to play this morning so I taped up all the bearing surfaces, and wrapped a wet towel around the shaft and welded the holes shut form the inside. worked out well I think. the output shaft still fits into the drum and doesn't hit the hub or intermediate shaft, and the snap ring goes on.

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What do you guys think?

Thanks,

Jeremy Franke
 
mattw

mattw

Active member
Re: 4l80e Gurus HELP!!

Good info. I'm a bit unclear on what year 80Es require the lube hole and what years do not require it?? Does anyone have that info?

The shaft I got from George does not have the lube hole and I have a 2000 80e..
 
J-bird

J-bird

Member
Re: 4l80e Gurus HELP!!

the 1997 and up transmissions don't need the lube holes. 1996 and prior years need the lube holes.
 
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