Ok so I had a local shop rebuild my 4l80 and install a transgo2 kit. After 1000 miles something is just off the shifts are soft even if I max out line pressure. Doesn't really make a difference . Changed controllers same ****. line pressure seemed low what could cause this? Cross leak? Epc ? Used to shift nice and firm. any idea? Any help is apprec

 

DId they drill out the spacer plate at all? Higher pressure wont help if the holes in the plate are too small.

 

I asked him that and he said he did . What would cause low pressure? What would leak?

 

Since it originally worked great Id say maybe the vb bolts or accumulator bolts might have worked themselves loose.

 

I'm hoping it is something easy . I just wish I had the knowledge to fix it my self.its kind of hard to go back on the guy because the trans does work.