Transmission shift issues and high line pressure?

[Justa6MB]

I have a 2004R with very few miles on it. When I installed it I verified the throttle valve measurements and TV cable adjustment. But the 1-2 shift doesn't feel right. So I checked the line pressures and got the following. Pressures taken at 1500 rpm. No TV: P=100, R=170, N=100, OD=100, D=100, 2=370, 1=370. Full TV=360-370 in all gear selections. So all pressures would seem ok - if the high pressures were 100 psi lower. What would cause high line pressures, and could that cause shifting issues?

 

[TexasT]

freshly built? have you talked to the builder?
i would guess it has a .570 boost valve. are you getting 2nd gear starts?

 

[Justa6MB]

Yes I talked to the builder and he said it's high but wouldn't be causing the issues. So unfortunately it looks like it will be coming out for inspection. Thanks.

 

[TexasT]

looking at the pressures again i think something wrong with the boost valves, pressure regulator or the over pressure in the pump. maybe something sticking.
1-2 shift quality could be poor clearance, servo too small, band not goodl/glazed over, drum out of round, glazed over. pin not tight. poor seal on the servo.
look it all over close.