What are differential ratios?

Differential Gear Ratio determines the number of times the drive shaft (or pinion) will rotate for each turn of the wheels (or ring gear). The higher the number, the lower the ratio: a 5.29 gear has a lower ratio than a 4.10 gear.

What does a 4.10 gear ratio mean?

Gear Ratio: the ratio of the ring and pinion gears in the rear axle. So, if you have a 4.10:1 (sometimes 4.10) rear axle, the pinion will turn 4.10 times for every single turn of the ring gear or in other words, for every 4.10 turns of the driveshaft, the rear wheel will spin once.

What is the difference between 3.73 and 4.10 gear ratio?

Well-Known Member. 4.10s are going to accelerate faster and decelerate faster on lift. However the trade off is greater fuel consumption per mile driven and higher engine speed per given road speed. In basic terms the 4.10s will feel quicker and 3.73 will feel faster.

What does a higher diff ratio mean?

A numerically higher axle ratio provides a mechanical advantage to send more of the engine’s available torque to the rear tires (and front tires, in a four-wheel drive vehicle), but you pay the price at the fuel pump. So, a truck with optional 3.73 gears will tow a heavier trailer than one with 3.55 or 3.21.

Is 2.47 a good gear ratio?

1 to 1 or direct gear, is always the best gear for fuel mileage, quietness, cooler temperatures in the transmission, and more pulling power. However, to run in direct gear, the rear gears must be either 2.64, 2.47, 2.21 and I think there is even a higher gear than the 2.21. The average speed today is 70 miles per hour.

What kind of differentials do I need from Rockwell?

We stock Rockwell differentials for Freightliner, Kenworth, Peterbilt, Mack, International, Sterling, Western Star, Volvo, Ford, GMC, Dodge and many more. We also rebuild any make or model of truck differential. If you need assistance identifying your model or the parts you need give us a call.

Is there an unlimited mileage warranty on Rockwell differentials?

Differentials are new and rebuilt by Pro Gear and covered with a one year, unlimited mileage warranty. *See warranty. All other warranties are that of the manufacturer. For over 20 years we have successfully exported world wide. We stock all makes and models of all your new used and rebuilt differentials, parts and kits.

What should the dwell time be on a Rockwell scale?

Leave the main load for a “dwell time” sufficient for indentation to come to a halt. Release load; the Rockwell value will typically display on a dial or screen automatically. In order to get a reliable reading the thickness of the test-piece should be at least 10 times the depth of the indentation.

Where can I buy a new Rockwell diff carrier?

We can remove and rebuild or repair your existing unit on site in our state of the art shop or ship your new, used or rebuilt Rockwell diff carrier Worldwide. Our parts department carries every conceivable part you could possibly need as well as hard to find parts.