![]() However Ford still kept the Dana 70HD an option until the Dana 80 was made available. This axle was standard for the Big Three (automobile manufacturers) dual rear wheel trucks until 1985, when Ford started using the Sterling 10.25 rear axle. The Dana 70 front drive axles used in the Chevrolet Kodiaks and GMC Topkicks also had these features. These upgrades gave the Dana 70HD a gross axle rating of 10,000 lb (4,500 kg). The axle tubes were increased to 4 inches (100 mm) diameter and carrier bearings were larger and thicker, the axle shafts were 35 spline only. Only 2 OEM gear ratios are offered: 4.10 gears and 4.56 gears. The ring gear is larger at 10.75 inches and features 37 spline axle shafts. The Dana Super 70 rear differential has become a staple axle for GM and Ford in the dual rear wheel chassis cab vans since 1999. Dana offered two different limited slip differentials with the Dana 70, the "Power-Lok" and the "Trac-Lok."ĭana 70U rear axle in a 1998 2500 Dodge Diesel Dana Super 70 ![]() The later, more current, Dana 70 axles use 29 spline pinions and 32 or 35 spline axle shafts. The Dana 70 started out using 10 spline pinions and 23 spline axle shafts. The Dana 70 rear axle was first used in the Dodge W300 in 1958. Since the manufacturing of the front Super 70 ceased after the discontinuation in 2009, the latest 4x4 medium duty 4500, 55 trucks utilize a Dana Super 60 since Ford kept it active in its trucks.Īll Dana 70 rear axles are full floating and typically have a gross axle rating of 7,500 lb (3,400 kg). 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 Dana 70 axle only came with 5.13:1 gear ratios and had a GAWR of 8000 lbs. These Dana 70 axles had open knuckles and ball joints. GM began making 4x4 Chevrolet Kodiaks and GMC Topkicks that utilize a Dana 70 front axle for the 2005-2009 models. While these axles were being manufactured, Dana offered a "Power-Lok" limited slip differential for some of these axles. Like the rear Dana 70 axles, the Dana 70 front axle started out with 23 spline axle shafts and then went to 35 spline axle shafts. ![]() All of these Dana 70 front axles were closed knuckle, with king pins and had a GAWR of 6000 lbs. Both companies used Dana 70 front axles until the mid-1970s (Dodge W300 pickup up until 1978, discontinued in 1979). International started using Dana 70 front axles in the late 1960s. The first Dana 70 front axle was used in 1958 by Dodge in the W300, in both 4.88 and 5.87 ratios. The main advantage a Dana 70 front axle has over a Dana 60 front axle is better gross axle weight ratings.ĭodge and IHC Dana 70 front axles In general, Dana 70 front axles are uncommon, due to attributes that the Dana 60 front axle can match. Dana 70 HD Front axle in a Chevy Kodiak 4500 4x4 truck.
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