Torque multiplication is provided by your axle gears.
For example, let’s assume that the engine is delivering 100 lb-ft of torque to the pinion gear. If the gear ratio of the ring-and-pinion is 4.10:1, then the output torque is 410 lb-ft (100×4.10). Now if the gear ratio is 2.49:1, then the output torque will be 249 lb-ft. when in a 1:1 ratio in the trans.
The 4.10:1 gears put way more torque & power to the ground than the 2.49:1 gears. This will accelerate the vehicle faster without modifying the engine.
For example, let’s assume that the engine is delivering 100 lb-ft of torque to the pinion gear. If the gear ratio of the ring-and-pinion is 4.10:1, then the output torque is 410 lb-ft (100×4.10). Now if the gear ratio is 2.49:1, then the output torque will be 249 lb-ft. when in a 1:1 ratio in the trans.
The 4.10:1 gears put way more torque & power to the ground than the 2.49:1 gears. This will accelerate the vehicle faster without modifying the engine.