6
6T3Vette
Guest
How can I tell what my Positraction gear ratio is w/o actually counting the teeth? I have a non-original '63 convertible, 4 spd, 300hp, 215x70 tires. I have read that stock was mostly a 3:36 for that engine but I'm pulling about 3200 rpm at 60mph in 4th gear. Does that sound right for a 3:36? While I enjoy the get-up-and-go, I would prefer more economy on the highway. If indeed I do have a 3:36, would a 3:08 make much of a difference on the rpm's?
I am also noticing a distinct "thud" coming from possibly the rear end when I upshift. Could this possibly be u joints on the drive shaft, half shafts or both?
Thanks for your help
I am also noticing a distinct "thud" coming from possibly the rear end when I upshift. Could this possibly be u joints on the drive shaft, half shafts or both?
Thanks for your help