My trans is giving me some issues. It worked fine when I got the car. When I was redoing the engine I had the trans bench serviced at a local shop. After I got everything back together I just moved the car in and out of the shop, 20 feet. So is about 2 years I've been doing this in and out of the shop. The other day I had to take it a few miles up the road to another shop. It was not a happy camper! Shifted up to 3rd okay then it was like it was in neutral. I eventually got it to the shop, a few days later I drove it back same issue if not worse. So I took the governor out, it seems to okay. Today I had the Vacuum Modulator out and tested, it holds vacuum, although there is oil on the manifold side of the diaphragm...but it holds vaccum. I used a magnet to remove the spool valve behind the modulator. It was kinda sticky and not too happy about coming out. But here's the thing..there was no spring in the bore behind the spool valve. Now some diagrams I see show a spring, some don't. So is there supposed to be a spring in the bore or no? Hope somebody can help. PS checked oil level several times, all good in the hood. Can the pump cavitate? Doesn't reasonable but ya gotta ask.