Dana 50 Front Axle Identification and Parts

The Dana 50 is a front-only, reverse-cut axle Ford used on heavier F-250 / F-350 4x4s and the Excursion. It is not a Jeep axle. There are two housings that take the same reverse-cut ring and pinion: the 1980s–90s Twin Traction Beam (IFS) and the later solid (beam) Dana 50 under Super Duty and Excursion. Gears interchange between those two; shafts, unit bearings, and TTB beams do not.

Shop Dana 50 ring and pinion when you are regearing a front Dana 50 to match a new rear ratio. Reverse-cut (high pinion) gears are required — standard-cut Dana 60 or Dana 44 sets will not work.

How to identify a Dana 50

The cover looks a lot like a Dana 60 or Dana 70 (all 10-bolt). Measure the ring gear and confirm it is a front reverse-cut before you order.

• Front axle only, reverse-cut / high pinion
• 9" ring gear on (10) 7/16"–20 ring-gear bolts
• 1.375" pinion with 26 splines
• 10 cover bolts
• No carrier break — one case for 3.54 through 5.38
• Dana BOM tag on the housing or beam

IFS vs solid: 1980–1997 F-250 and 1980–1986 F-350 4x4s used Dana 50 Twin Traction Beam (two stamped beams, leaf springs, ~4-3/16" hub). 1999–2002 Super Duty and 2000–2005 Excursion used a solid Dana 50 front. A Dana 44 TTB hub is smaller (~3-5/8"). A Dana 60 front has a 9.75" ring gear.

Gear ratios

We stock Dana 50 reverse-cut ring and pinion in 3.54, 3.73, 4.11, 4.30, 4.56, 4.88, 5.13, and 5.38. Match the front ratio to the rear so the transfer case is not splitting the difference on the highway. These gears fit both IFS and solid Dana 50 carriers. Use a master install kit (bearings, shims, seals, crush sleeve) for backlash and pinion depth.

Vehicle applications

Dana 50 IFS (Twin Traction Beam), front

• 1980–1998 Ford F-250 3/4 ton
• 1997–1998 Ford F-250 Super Duty 3/4 ton
• 1980–1986 Ford F-350 1 ton

Dana 50 solid axle, front

• 1998–1999 Ford F-250 3/4 ton
• 1999–2002 Ford F-250 Super Duty 3/4 ton
• 1999–2002 Ford F-350 Super Duty 1 ton
• 2000–2005 Ford Excursion