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I got 8-9 mph shift changes with my adjustable modulator with 11 pounds set at the vrv....he moved the vrv with measuring the vacuum at the wrong end of the vrv so it is unkown what he's got at the modulator now...I'd bet the guys that rebuilt it adjusted the mod to get the shift it needed with...

Dang...at least you got them in the right spot now...is the vacuum regulator all the way forward?...all the way back gives it more vacuum so it'll shift later forward is less vacuum so it'll shift sooner...the trans should be set at 11 on the top vacuum line...it could be getting to much vacuum...

Crap I wrote it wrong...vacuum should be bottom and trans is top...swap them it'll work then...Oh and I set mine at 11 on the top hose at idle...shifts great.

So I gotta ask if the vacuum is coming in at the top of the vacuum valve at the throttle and going out to the trans at the bottom...I took a pic of mine just curious since mine did the same thing.

Swap the hoses at the vacuum switch on the throttle...mine was swapped and figured it out after a bit of testing...vacuum goes in the bottom comes out the top...if you have a vacuum gauge it'll make setting the switch easy.,,I set mine at 11 hg at idle running and it shifts great.