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There were many ratios offered over the lifetime of the AMC 20. [1] Letter codes were stamped on the axle to indicate installed gears. AMC changed or reused letter codes during the axle's long life. There are other gear ratios available in the aftermarket.
When in "4-Low" mode the front and rear axles are locked together and power is sent to all four-wheels through a 2.92:1 gear reduction in the power transfer unit; providing a crawl ratio of 56:1 for four cylinder Jeep Cherokees and a 47.8:1 crawl ratio for six-cylinder Cherokees. All Cherokees with this system have a raised ride height of one inch.
It has been manufactured by Dana Holding Corporation since 1985 when American Motors (AMC) sold its axle tooling equipment to Dana. [1] The axle was named AMC-15 when it was first made in 1962. [1] Dana upgraded the axle, and added IFS and Twin Traction Beam front axle variations. Dana 35 from a Jeep
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 ...
The Dana 44 Front axle first saw use in the 1950s and still in use today. Dana 44 Front axles were known for utilizing locking hubs or a center axle disconnect system. However, a permanently locked-in Dana 44 is not uncommon. The Dana 44 has seen use in 1/4-, 1/2-, 3/4-, and 1-ton rated trucks.
Otherwise the Dana 20 offers the same drive modes as the Dana 18. Its low range has a ratio of 2.03:1. The Dana 20 is generally compatible with the "big hole" Dana 18. One exception is the version used with the THM400 in full-size Jeep trucks, which used a different spline number on the input gear. Applications: Jeep CJ; Jeep SJ
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.
The final drive ratios of the CJ-7 were different for each type of engine: the 145 cu in (2.4 L) diesel was mated to the 4.10 ratio axle (in both Renegade and Laredo), while the 258 cubic-inch straight six and 150 cubic-inch four-cylinder used 3.73 and AMC V8 304-powered models (produced 1976–1981, which became part of the Golden Eagle ...