Ok just did my 12 bolt swap. And went to drive car, it doesn't pull in OD or D. I can pull it down into 2 or 1 and I feel it grab. As i drive it I can manually shift it and all the gears are there including lockup. But when I stop I feel the tranny neutral out again. Any tips or did i accidentally unhook something while under there?

 

maybe

https://ls1tech.com/forums/automatic...-4th-help.html

 

Sounds about right! I busted my 10 bolt at track reason for the rearend swap. Just what I need after dropping 3800 for new rearend and suspension!!

 

My sprag broke in July of 09,racing at the track,haven't fixed/replaced it yet,been driving it as 'manual' ever since. I've gotten used to manual shift an auto. Even took a trip from Ohio to Florida in Nov.2010 that way.

 

The input sprag failure is pretty common when breaking a rear end. I have also seen where the low roller takes a whack as well. Make sure to address these when you have it apart. Vince

 

Well time to save up some $