I checked up and down the Service manual and it has no talk about external pressure tests like older transmissions. Basically how it functions and what clutches are used per gear. Quick question - did the outside shop for sure program the new valve body to the transmission control unit? A sticker comes with the new valve body with the solenoid and sensor strategy that tells the TCM how to work with it. It causes very weird problems if not programmed correctly. After the valve body is installed, the new sticker is placed on the side of the trans on top of the old one.
Appreciate the thorough research.
As far as the shop programming the new valve body, I am just taking his word for it. They are highly recommended (30 years in business.) 4.9 google rating (100 reviews), and he stated he has done multiple valve bodies in 10r80s.
Also after picking it up it drove much much better than before, for about 100 miles…
But I heard back from him today. They got the tranny out and found some damage. CDF drum bushings, damaged. Damaged piston and a damaged clutch plate. So it’s getting a rebuild. All in it should be under $4k.. and a warranty. I’m really hoping this fix it, I just want the damn thing to work.
First thing I’m doing when getting it back is changing the thermostat to a 160 degree and a transmission tune. Hopefully it will extend the trannys life.