This can be confusing at times for me. Someone got me off track in another thread elsewhere. I was making the point the rpms you could turn in each gear would go down without hitting critical speed. He came back with putting the car in neutral would still spin the driveshaft is the same, which is true but I was also right from an rpm for a given gear driving down the road perspective. The thing that got me confused is, with a gear change, the driveshaft will spin faster going from IE 3.31's to 4.10's. That represents how many times the DS rotates for every turn of the wheel, no matter the diameter. Knowing that the mph before hitting critical speed will go down if you think of it that way.
Last edited by DanK; 08-09-2013 at 03:31 PM.