The VB has an updated Sonnax kit installed. I will go find the specs that they gave me. Ok, here they are: Upgraded Manual Valve, Upgraded Switch Valve, Upgraded Pressure Regulator Valve, all Solenoids are tested, rebuilt or replaced with new.

Unfortunately, I won't be the one installing this. I'm not set up to do it. My mechanic has been doing this for 30 plus years, so I hope he verifies that everything is flowing. If not, I can do this once I get the truck back home, its only a five minute drive. Is it common for the anti-drain down valve to be stuck after a rebuild?

A new cooler is going in, but I'm reusing the same lines. As of right now the fluid in the old unit is still bright, and when I had the pan down it had no bad sludging or metal flakes. My mechanic said he'd blow the lines out with compressed air, to check for any blockages.