* Axle Ratio: 4x4 trucks typically have lower axle ratios (numerically higher, e.g., 4.10) than 2WD trucks (which might have 3.55 or 3.92). This is because 4x4s need more torque to overcome the additional drivetrain friction and operate in off-road conditions.
* Transmission: While the transmissions *might* be the same (depending on options selected), the final drive ratio in the axle is the biggest difference.
* Engine/Application: Even if the transmissions were identical, engine choices and intended use would influence the final drive ratio chosen by the manufacturer for each model.
To know the exact gear ratios for a specific truck, you need to check the vehicle's specifications. This information is often found:
* On a sticker: Look for a sticker located inside the driver's side doorjamb, glove box, or under the hood.
* In the owner's manual: If you have the original manual, it should list the gear ratios.
* On the axle itself: The axle ratio is often stamped on the differential housing.
* Through a VIN lookup: Online services often provide vehicle specifications based on the Vehicle Identification Number (VIN).
In short, while some components *might* overlap, assuming the gear ratios are the same is incorrect. Always consult the vehicle's specifications to be sure.
