At first, the "tranny" (the th350) shifted very strange, when I was driving at third gear, and realeased the throttle, the car immidiatly shifted down to second gear.

After that I changed oil and filter in the "tranny". The was a lot of mud in the old oil.

Then it changed gears perfectly for about 7 miles, but when I but it back in the garage, it started to slip, and it reqiured a lot of rpm to move.

Tried it again today, and started with filling in some more oil. Now the "tranny" reqiured even more rpm to make the car move, and when the car moved, it jumped away like a dragster.

Thankful for answers.

Sorry for my bad english!