Heartbeat said:I have a 350cu.in./350 turbo and what I believe to be a Power Glide rear end with a 3.36 ratio in my 56 Chev and use 15" 245/70 series rear tires. I have no trouble cruising 70-80 mph, but I still feel I need another gear.
With a 10 bolt, I agree with not using anything higher than a 3.42.
catfish hunter said:i think he means numerically higher.
4.11 would be 3336 rpm at the same 65 speed.dawg said:yes your correct
heres an example
with 3:08 rear gears doing 65 mph on the highway your rpm would be 2500
with 4:11s at same speed your rpm would be 5300.
hoigher gearing is really not suited for highway speeds cuz it tends to put strain on the motor (constant high RPMs).