Modifying already modified Valve Body?
 

I have Don's VB mod. I've had it for over a year now. It doesn't shift as fast 1-2-3 as I would like. 2-3 is pretty stock feeling. I do feel the tranny kick down 2-1 pretty fast but I think the upshifts could be a lot faster. I'm wondering if anyone has taken their VB modified by Don to Maximum Tuning or had it redone by another shop.

*bump*

After speaking with Jeff, there's not much that can be done about the 2-3, and really nothing from 3-4. 1-2 is the main shift that they can drill wider to allow higher line pressure. 2-3 is hardly tweakable at all, so I don't think it's worth taking it all apart. Weaker shifts may just be the wear and tear on your tranny itself.

Pull the tranny resistor and your tranny will shift a lot harder :D

No thanks. =P Someone wired up a switch to the resistor or replaced the resistor with a variable one and ended up with a fire inside the cabin. Haha. No thanks. =P I'll just live with it.