FYI you can send the credit card people after him. That's part of their charm.
Nothing ventured nothing gained and you might be surprised because They will get his undivided attention.
Good Luck!
Yes, if you tell them you tried to handle it with him directly with no response from him, they will yank that $600.00 right back out of his account and credit your account... That is IF he has the $$.
I have Joes Pro Brake with low band apply on my bench and I'm about to install it. I bought it prob 8 mos ago. It took forever for him to ship it after I paid him. There were huge snow storms at the time so he said he couldn't get to the shipper. Made sense at the time. I do have a RMVB with low band apply of Joes that works flawless. I'm hoping the TB valve body does the same.
So you guys know Joes brake is a 1 wire hook up and no mods need to be made to the drum etc. All functions are handled by the VB. Grounding is done through the Trans & mounting to cross member/chassis.
As Tony mentioned if your Trans has an internal leak or if your drum was modified for a different TBVB and you swapped Joes in that could be why. Those a 2 good reasons why it could not be working correctly. Your problem may be elsewhere and the VB is fine.