I have a 92 vigor and just recently my tranny is (or feels like) it is slipping. It shifts from 1st to 2nd fine but when shifting to 3rd it feels like it has gone into neutral, but if i get the rpms up enough it will shift into 4th. Or I can manually shift it from 2nd to 4th. I have checked my fluid fluid is okay and not burnt anyone have any suggestions? I appreciate any advice that you give me