Hi, I'm new to the forum.... I rebuilt a CZ3 Monte SS core for my 65 GTO about a year and a half ago.... I used the CK master kit added a billet input shaft, 13 vane pump and a Hughes 2300-2500 lock up convertor. The unit worked fine until this passed November, until I had an afternoon of some spirited driving around town LOL. I'm not sure what happened, I drove the car home and all was fine. Wife took the car out for a drive a week later and complained it felt like the more she pushed on the throttle the slower it went. She brought the car home and I test drove it later....1-2 shifted mushy and 2-3 was like someone threw an anchor. Fluid smelt bad so I took the unit out. Red Alto wide band smoked? I did some research and heard there was a bad run on these bands. It looked like the friction material peeled off the steel...??? I disassembled the unit all clutch packs were fine, direct drum was F'd ( bought replacement from CK). Cleaned everything up and began the re assembly. Had an terrible time finding replacement "Wide" band, finally found a extra wide Kevlar band from another local trans shop. I disassembled and cleaned the Valve body and put it back as it was (I thought).....I put the unit back in the car last Sat with some mods to the governor because the 1-2 shift was a little uncomfortable as it was and really thats the only thing that changed from the original attempt. I tested the unit in the garage with it jacked up and I was happy It had all the gears and lock up... Checked the fluid level and took it for a ride. Shifted a bit too early now but manually it shifted fine. So I figured I'd drop the pan and lighten up the governor weights unit I got it where I liked it. Thats where it all went bad.....Pulled Gov out and made some adjustments, put it back..... now no up shifts......WTF. Checked pressures, min TV seemed good in all positions, Max TV seemed low in 4-3-2-1 and was very erratic on the gauge. As I stroked the TV cable the pressure rose, but when it approached 200+ it dropped significantly to like 150 ish (hard to tell as gauge was bouncing) so I thought PR valve or pressure relief ball spring bad.....???? Any I wound up pulling the dam thing again, no trash in pan, pulled pump and double checked springs ETC all looked fine, I added a couple washers behind the relief valve spring between anchor Nail, didn't think that could hurt. Next was the VB inspection...... checked all the valves that were Identified in the CK kit to modify and the only smoking gun I found was the .250 cup plug was missing behind the 3-2 control valve???? Is that it??? Why would if be fine one day and F'd the next when all I messed with was the Gov? FML!!! Any help confirming this was my issue would be AWESOME... Thx All!