Honda MTF or Penzoil (GM) Synchromesh are the two top contenders for what should be in your transmission. Today's classes of engine oil don't have the same composition of additives that are required for your transmission function correctly or be reliable.
Does the transmission grind or is just difficult to put into gear? Do you have anything but a stock shifter and shift linkage in your car? Are your engine mounts in good shape?
Does the transmission grind or is just difficult to put into gear? Do you have anything but a stock shifter and shift linkage in your car? Are your engine mounts in good shape?