E66 transmission compatibility

[nm735]

Hello! I've just gotten royally screwed. I recently bought a 2003 760Li from someone who claimed (falsely) that it was in perfect condition and needed nothing. Per the BMW dealer, it needs a transmission. They've told me that I can supply the transmission and it'll cut down on their costs. I found a transmission on eBay with a 1 year warranty for a 2003 up to February 2003 production. Mine is a March 2003 production model. The part number does not match, but it's still the GA6HP26Z transmission. The part number for the transmission I found is 24007527560, and the part number for the March 2003 diagram is 24007534327. Are these parts able to interchange? My sense is not, because that would imply I have gotten lucky. But if somebody knows, please let me know.

[BMSman]

What is wrong with it? Most often it is the valve body or bridge seals... an easy fix.

[nm735]

It's slipping in gears 4, 5 and 6. Any meaningful load in those gears causes it to go into failsafe mode.

I did some research a few days ago. When this happens on the E90s, it's usually the valve body, so I think it might be the valve body, and I'm trying to get it into a shop that can pull it and do the solenoids. My sense is the BMW dealer here doesn't have much experience with the E66.

[nm735]

As a brief update, I have found somebody to rebuild it. It was absolutely screwed. Valve body did nothing.