Why the rebuild?
You hook up your factory speed sensor to the rear plug i believe, new speartech wiring harness has one that goes in front.

 

I bought the trans as a core, and I'm a 6-speed (M6) ,and Ive had fun with it, but now its time to get down to business. The engine is getting to big and powerful for a stock M6. And i want to be consistent with my runs. and will be starting my LS3 434cid this spring. And im getting tiered of all the shifting and clutch work.

 

Oh so the auto wasnt functioning? Yea i got rid of my 6sp too, happy about it as well.

 

PN# is 24204472 ac delco.

 

Would it be a good idea to find a set of 5 pinion planetaries instead of the factory 4, do i need to change the drum and all or just the planets then self.

 

Seeing how it's a 2004 model year it may already have them, especially if it came from behind an 8.1

 

No, I tore it down and it has the 4 pinion, I read that the 4L85E is the only ones that came with the 5 pinion with the 8.1L engine.

 

I took the trans apart and noticed that the center support is not the right one for the 04 models . The end were it supposed to be machine down .040" (recessed)for the thrust bearing ,Its not , its flat. But it bolted up in the case . What is wrong here ,is there mismatched parts in this tranny !!!

 

Hey Randy I was just wondering what you were going to use to control the tranny. Im looking to do the same thing (currently an m6) and I dont know which way to go about it. Thanks, Joe

 

Im going with a manual valve body with a vacuum modulator to control the pump pressure

 

i dont even think the trans would work without a filter since it kinda acts as the inlet to the pump. Atleast thats what i thought.