F350: 4.30 or 3.73 Gears
Very close to ordering a new F350 SRW 6.2 engine, long bed, rear wheel drive, crew cab. Tow a Grand Design Reflection 27RL. Pin weight 1900 lbs and trailer at 9000 lbs (both scaled weight, fully pac...
Forum Discussion
Denny & Jami wrote:
The rear end gears are the final torque multiplier, so the 4.30 gears will give you more power at the pavement.
Here's a simple explanation, if you have a 10 to 1 torque multiplier on a wench it will take 100 ft lbs of torque to apply 1000 lbs of torque to the bolt but if you use a 5 to 1 it will take 200 lbs of torque to get the same 1000 lbs at the bolt.
So even when using the lower transmision gear you will not get the same torque to the rear wheels when using 3.73 gears over the 4.30 gears.
Yes and no. You're leaving out the fact that the transmission multiplies torque exactly the same way as the rear axle. It makes no difference where the torque is multiplied. If third gear is 1:1 and fourth is .67:1, a 3.73:1 rear axle in third gear has a torque multiplication of 3.73:1. A 4:30 rear axle in fourth gear has a torque multiplication of only 2.88:1.
