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The load on the road from one axle (2 wheels) is 10 times greater for a truck than for a car. However, the fourth power law says that the stress on (damage to) the road is this ratio raised to the fourth power. The road stress ratio of truck to car is 10,000 to 1.
The back of the concrete mixer truck carries a 'booster axle', which can be lowered to extend the wheelbase of a fully loaded truck to comply with regulations. [ 3 ] The formula was enacted as law to limit the weight-to-length ratio of a commercial motor vehicle (CMV). [ 4 ]
A dump truck with an airlift pusher axle shown in the raised position. Some dump trucks and trailers may be configured with a lift axle (also known as an airlift axle or drop axle), which may be mechanically raised or lowered. The axle is lowered to increase the weight capacity, or to distribute the weight of the cargo over more wheels, for ...
Dana 61 axle tag showing 3.73:1 ratio [1] The Dana 61 was made in semi-float and full-float axles for select 4×2 and 4x4 Ford 3 ⁄ 4-ton and 1 Ton Pickups and Vans from 1974 to 1987. A Dana 61 front axle was selectively used in Dodge 4×4 3 ⁄ 4-ton and 1 Ton pickups from 1987 to 1993. Although 3.07:1 and 3.31:1 gear sets are common for a ...
A common use of differentials is in motor vehicles, to allow the wheels at each end of a drive axle to rotate at different speeds while cornering. Other uses include clocks and analogue computers. Differentials can also provide a gear ratio between the input and output shafts (called the "axle ratio" or "diff ratio").
The Ram 3500 has three axle ratios (3.42, 3.73, and 4.10) and 17" wheels. Ram 4500/5500 has three axle ratios (4.10, 4.44, and 4.88) and 19.5-inch wheels. The 4500/5500 Rams rear axle is a Dana S 110. The front axle on 4×4 models is manufactured by Magna, while 2-wheel-drive models just have a solid, non-drive axle.
The Dana 70 axle only came with 5.13:1, 4.88,5.31 [citation needed] gear ratios and had a GAWR of [citation needed] these axles were rated at 7-9klbs as seen on 5500 door stickers. They differ greatly from previous Dana 70 front axles, some of the major differences being the use of 1550 Universal Joints and being a high pinion, reverse cut axle.
For model year 2000 - 2004 trucks, the F-150 7700 offered this axle and the F-250 light duty was discontinued. At least till 2011 the 12 bolt semi float was still found with the heavy duty f-150. Gear ratios were 3.73 in 4x4 and either the 3.73 or 4.10 in the two-wheel-drive models.