There are four ways to find a ratio.
1 A dealer can normally tell from the vin number.
2 There are normally tags or labels on the axle that have part number, gear ratio, and fluid requirement
info.
3 You can count how many times you have to turn the driveshaft to get one complete turn of the tires.
4 You can divide the number of teeth on the ring gear and divide by number of teeth on the pinion.
3.90
323
Probably either 4.33 or 4.56.
It should bury the speedometer depending on the gear ratio.
sounds like your torque converter is faulty in your transmission
most common ratio is 373
3.08 makes a good ratio for economy. 3.55 for more power when towing.
Probably about 2.73-1.
Wouldn't matter on the highway. The high gear ratio is 1:1 on both. The 350 has a lower first gear, which would be better for getting started. Especially in a heavy vehicle.
1st- 2.52:1 2nd- 1.52:1 3rd-1:1
i have a 92 silverado 1500. put 410 gear in and took out stock 308 gear. yours is probaly the same if you have 350 engine and 700 trans.
Best thing to do, is change the gear ratio in the axle. Depending on what gear ratio you have now, go to a lower numerical axle ratio. For instance, if you have a 3.73 gear ratio now, try using a 3.55, or 3.23. You will be going faster, before the engine hits the chip.