Here's what I gather about the spacer:

The 4L60E flexplate is dished in the center. The 4L80E flexplate is flat.

There are two things that need to line up on the flexplate: first, the teeth need to be set to the right place for the starter to engage, and second, the center hub of the converter needs to seat correctly into the flexplate.

When you use a standard 4L80E converter with the 4L80E flexplate, the spacer needs to go between the crank and the flexplate. This puts the flexplate in the correct position for the starter to engage it (since it's flat), and also puts it in the correct position for the center hub of the converter to seat.

When you use a hybrid 4L80E/4L60E converter, you use the 4L60E flexplate. Since it is dished, it is already in the correct position for the starter teeth to engage, but the dish in the center pulls it away from the center hub of the converter, so the spacer needs to go between the flexplate and converter in this case to give the converter hub something to seat into.

That's what I gather from my reading anyway. Hopefully it makes sense.

 

yeah that makes sense...that is what I was thinking...
back to the yoke...
anyone know the gm part # for the yoke I posted earlier?

 

I used a Turbo 400 1350 Yoke and had it trimmed down about a 1/2"

 

anyone buy from these guys before?

http://cgi.ebay.com/ebaymotors/ws/eB...m=190160121775

 

That would be a direct swap. The factory u-joints are a 3R. I did a 1350 slip yoke with a hybrid adaptor 3R/1350 u-joint. My intention was to upgrade everything to 1350 joints.

 

the one I was wanting was a Neapco yoke...N3R-3-9161X or its GM equivalent (part unknown)
I just don't know if there are quality issues w/ alot of these shops selling low price yokes...
the Neapco I priced locally was $95...cheapest I found online was $75 plus shipping...
this e-bay one is not Neapco, yet it is $30 plus shipping...

 

I broke my first slip yoke. It was a cheapo. It was a 3R.

 

that's what I am afraid of...
guess I'll go w/ the name brand one...
I would like to know the GM part # for its equivalent though...
I get a pretty good discount on GM stuff locally...

we have that same washing machine

 

found the Neapco locally a little closer to home for $89...
hopefully I can pick it up tomorrow...

 

just get one from the junkyard off of a 2500hd with a 4l80e thats what i did im gonna finaally be done tommorow with my swap so i will put up some pics tommorow still trying to figure out if you have to purchase a new license for hptuners to do the segment swap.and my p.i converter was made to use the 5.3 flex plate so if your getting a new one get a p.i and be sure to tell them you are doing the swap .