T56 transmission oil Amsoil or Redline or else

[Ralph L]

Great, thank you both!

[daveg]

You can still find Dextron III. Tranny shifts better cold with Dextron. Only thing you may encounter is NGR.

[Aevus]

This does sound clutch related. I'd remedy as soon as possible since every shift puts extra wear and tear on the synchro's fighting against a clutch the doesn't fully release....

another on and off problem... For the last few days, everything is fine.