QU20353U Used 3.73 Ratio Ring and Pinion Set

QU20353U Used 3.73 Ratio Ring and Pinion Set for 1999-2007 Ford 10.5" Sterling Rear Axles are good, used factory gear sets for 1999-2010 Ford Sterling 10-1/2" rear axles in Excursions, F-250, and F-350 Super Duty trucks. These used, matched, ring and pinion sets are from axle assemblies our Research and Development Department had for part verification and tool design purposes. Available while supplies last.

There are three available ratios for your Sterling 10-1/2" Rear Axle. See Tech Note 1 for production info.

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Dan the Gear Man® Tech Notes:
2007 Models
Shims
Product Note
Matching Parts
Applications

Tech Note 1: 2007 Models
2008 and newer 10-1/2" rear axles use a different inner pinion bearing. Some sources list 2007 to have the early bearing, other list the late. From what I have seen, most, but not all 2007 model year axles have the later bearing, but since Ford part number lookup is now based on the Vehicle Identification Number (VIN), we need the VIN to verify which gear set you need. So if you have a 2007, contact us with your VIN before ordering so we can tell you what parts are correct for your truck.

Tech Note 2: Shims
When you are doing a gear swap, most likely you will need to change the pinion depth with a different thickness shim and reshim the differential for proper gear contact and bearing preload. For the diff, we do have some of the OEM thick, cast shims (really a spacer), but you need to know the exact thickness you need before ordering unless you want to spend a couple of hundred plus on a spacer kit. The alternative is to use a "build-a-shim" shim kit like our QU50788 which allow you to stack thinner shims to get the desired thickness.

Tech Note 3: Product Note
These are USED ring and pinion sets. The teeth on both gears look good but since there are so many installation and use variables, we make no warranty as to durability or noise once they are installed!

Tech Note 4: Matching Parts
Matching parts for Ring and Pinion Sets:
QU50788 Diff Shim Kit
QU50689 Pinion Depth Shim Kit
QU50594 Rear Diff Bearing and Seal Kit 1999-2007.5
QU20003 Outer Pinion Slinger
QU40615 Replacement Limited Slip Clutch Set for 2 pinion diff
QU50789 Ring Gear Bolt
QU40400 Rear Differential Cover Gasket
QU20004 Axle Shaft O-Ring
QU20002 Pinion Nut
QU20000 Crush Sleeve
QU20050 OEM Pinion Seal

Applications
Ford:
F250, F350: 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
F250, F350 some early production axles: 2007
Excursion: 2000, 2001, 2002, 2003, 2004, 2005