Which rear end gear ratio is best?
The most popular rear-end ratio in trucks today is the 3:55, which sort of averages towing power and fuel economy. This is a good ratio for the occasional towing or hauling individual. For a person who tows more often, and heavier loads, the 3:73 or 4:10 may be more appropriate.
What is an AMC 20 rear end?
The model 20 rear end is a straight axle with enclosed axle shaft tubes that is suspended from the vehicle with leaf springs. The model 20 was used in several Jeep models, such as the 76-86 CJ, Wagoneer and Cherokee, as well as some AMC models, such as the Eagle four-wheel-drive car.
Is a 3.73 gear ratio good?
FACT: A 3.73 axle ratio is ideal for towing heavy loads on flat terrain and will produce increased fuel economy during steady-state, long-distance highway driving.
What is an AMC 20 axle?
The AMC Model 20 rear axle was at one time a common component in Jeeps, some American Motors cars, and as IFS/IRS differentials in the Hummer H1. Easily identified by a round cover with 12 bolts, inside is an 8 7/8-inch-diameter ring gear. The AMC 20 axle was delivered from the factory with a two-piece shaft design.
What axles does a cj7 have?
From 1976 to 1980, the CJ-7 used a Dana 20 transfer case, Dana 30 front axle (27- or 31-spline), and an 29-spline AMC 20 rear axle, while in recent years, Laredo package added tachometer, chrome bumpers, tow/recovery hooks and interior, comfortable leather seats, and clock.
What are 410 gears good for?
This equates to a greater amount of power transferred to the wheels. Installing 4.10 gears improves the car’s performance on the track but with negligible effects to the highway driving. If your car is equipped with an overdrive, you may not even notice a difference in gas mileage with the new higher gearing.
What is a 410 gear ratio?
If the gear ratio of the ring-and-pinion is 4.10:1, then the output torque is 410 lb-ft (100×4. 10). Similarly, if the gear ratio is 3.08:1, then the output torque will be 308 lb-ft. It’s easy to see that the lower 4.10:1 gears put more power to the ground than the higher 3.08:1 gears.
What are 3.92 gears good for?
But opt for the higher 3.92 axle ratio and that same truck packs a higher towing capacity of 9,930 pounds. The extra towing capacity comes about because the increased engine spinning helps improve off-the-line acceleration and pulling power when carrying heavy loads.