LBZ: Need help!

[Chevy1925]

All voltages and grounds were good... Still don't see what it could be! Getting very irritating.

if the t-case is 100%, it really only leaves you one place to look

 

[Dirtymaxx07]

Yep, well trans is back out. He came over today and said, I hate to tell ya this but let's get it back out, Sounds like something didn't seat right or isn't riding like its supposed to... So I had it out in about an hour and twenty mins. He's going to get tore down and let me know something. I will keep you all updated.

 

[Mike L.]

Yep, well trans is back out. He came over today and said, I hate to tell ya this but let's get it back out, Sounds like something didn't seat right or isn't riding like its supposed to... So I had it out in about an hour and twenty mins. He's going to get tore down and let me know something. I will keep you all updated.

Look at the teeth on the C3 clutches and maybe the C4. You will see a pattern on the teeth if one of them didn't catch the ring gear support.
On edit.
Did your builder use the .100 shim under the big plastic washer? this steel shim raises the ring gear for the C3 clutches to support the extra C3 frictions.