I just went out to get a bit of gas for my supra. 1st gear 3000rpm's 15 mph. 2nd 3.5 and 4000 rpm's. 3rd gear same thing, 4000 rpm's and it is a struggle to hit 20 mph. The engine is reving just fine. I think my clutch is slipping. Can anyone give me some suggestions as to what the problem might be??? thanks for your time everyone. mike