I imagine you have a 722.4XX transmission. Bergwerks has a page on their site for a valve body modification. Unfortunately, I've waited a long time for this page to be completed.

I do believe that the change is a simple mod to the valve body. Maybe as simple as moving one spring. I've never been able to find the details.

I did run across a place on the net that does this mod. I don't remember who it was but it was unreasonably expensive, about $200-$300 if you sent your valve body in for the simple mod.

Please keep us posted on your progress.

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2012 E350
2006 Callaway SC560