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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/Spicer Model 70 is an automotive axle manufactured by Dana Holding Corporation and has been used in OEM heavy duty applications by Chevrolet, Dodge, and Ford.It can be identified by its straight axle tubes, 10 bolt asymmetrical cover, and a "70" cast in to the housing, which is visually similar to the Dana 60.
The Dana 80 Trac Lok is unique being it is a 4 pinion unit, unlike other Dana Trac Lok units with 2 pinions. This was the only rear axle available for the 2nd generation Dodge Ram 3500 trucks. [2] 35 Spline Dana 80 in a 2002 Dodge 2500HD Diesel
However, the 10.5" 14-bolt axle remains in production today, specifically utilized in GMC Savana and Chevrolet Express vans. Notably, the 11.5" 14-bolt axle is featured in third-generation Dodge Ram 2500 and 3500 trucks. There are discernible differences between the GM and Ram versions, evident in the gaskets used and the axle cover designs.
The front is an AAM 9.25 and the rear is a hybrid AAM 10.5 with the larger axle shafts from the AAM 11.5. Despite the fact the axles have locking differentials, the rear axle is also a helical-type limited-slip differential when unlocked. The Power Wagon is equipped with a 4.56:1 axle gear ratio not available on other 2500 models.
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.
The HFE is only available with the V6 engine with the eTorque hybrid system (except with the 2021–2022 models which were also available with the EcoDiesel), the most economical rear axle ratio, 20-inch wheels with low rolling resistance tires, a smaller 23-US-gallon (87 L; 19 imp gal) fuel tank, and in a 4×2 configuration (reducing weight).
The Dana 44 rear axle first saw use in the 1940s and is still in use today. The Dana 44 has a GAWR up to 3,500 lb (1,600 kg) and is a semi-floating type, having one bearing on the end of the axle shaft which carries the weight of the vehicle on the axle and also allows axle rotation.