Yukon Gear High Performance Gear Set For Dana 60 Reverse Rotation in a 3.73 Ratio
A Ford Super Duty that growls from the front axle in four-wheel drive, a front Dana 60 that has to be matched to a rear axle re-geared to 3.73, or a high-pinion swap axle that came out of a junkyard with unknown gears all lead to the same purchase: a reverse-rotation ring and pinion. Yukon part number YG D60R-373R is a 3.73 ratio set cut for the reverse-rotation Dana Spicer 60, with a 9.75 in. ring gear, a 29-spline pinion and 12 ring gear bolts.
In a high-pinion front axle the pinion enters the housing above the axle centerline to give the front driveshaft more ground clearance. That flips the direction the pinion turns relative to the ring gear, so the teeth are loaded on the opposite face. Reverse-cut gears move the strong drive side of the tooth to where the load actually lands. A standard-rotation Dana 60 set installed in a high-pinion housing runs on the weaker coast side all the time and wears fast. This 3.73 set keeps the 4x4 front axle turning at the same speed as a 3.73 rear, which the transfer case needs when both axles are locked together.
First confirm rotation: if the front driveshaft enters the housing above the axle tubes, the axle is high-pinion reverse rotation. Our Dana 60 ring and pinion buyer's guide explains rotation and the carrier break in detail, and the Dana 60 front axle problems guide covers the hub, bearing and gear failures common to these trucks. Read the axle tag for the factory ratio, and check the rear axle ratio too, because front and rear must match.
Yukon lists this set for the reverse-rotation Dana Spicer 60 with a 9.75 in. ring gear, 29-spline pinion and 12 ring gear bolts. The most common application is the 1999-2016 Ford Super Duty F-250 and F-350 front axle. It is not for the 2017-and-later Super Duty short-pinion reverse Dana 60, which uses a different gear set, and it is not for standard-rotation rear or low-pinion front Dana 60s. The 3.73 ratio uses the 4.10-and-down carrier, so if you already have a 4.56-and-up carrier you will need the other carrier series. Send your year and VIN and we will confirm, or see the 5.13 reverse-rotation set for deeper gearing.
Yukon's set-up chart for the Dana 60, 61 and 70U lists a 0.052 in. OEM pinion shim, 17-30 in-lb of preload on new pinion bearings, 0.006-0.011 in. backlash, 110 ft-lb on the ring gear bolts and 80 ft-lb on the caps. Carrier bearing preload is set with shims, and many installers use a Dana 60 housing spreader to remove and install the carrier without damaging the bearings. For a 1999-2016 Super Duty front, the Super Dana 60 front master install kit provides the bearings, races, seal and crush sleeve. A pinion depth setting tool shortens the trial-and-error on pinion depth.
Fill with 75W-90 or 75W-140 GL-5 gear oil per your truck's owner's manual. Front gears still need a break-in: follow the ring and pinion break-in procedure, keep 4WD use light for the first several hundred miles, and change the front axle oil at 500 miles to flush out the break-in particles.
| Brand | Yukon Gear & Axle |
| Part number | YG D60R-373R |
| Fits | Yukon Gear High Performance Gear Set For Dana 60 Reverse Rotation in a 3.73 Ratio |
| Type | Final Drive Gears |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Look where the front driveshaft enters the axle. If the pinion is above the axle tubes, it is a high-pinion reverse-rotation axle. The 1999-2016 Ford Super Duty front Dana 60 is the most common example.
No. The 2017-and-later Super Duty front uses a short-pinion reverse Dana 60 that takes different gears. Use a set made for that axle; send your VIN if you are not sure which one you have.
The 3.73 ring gear fits the 4.10-and-down carrier series. If your axle came with 3.54, 3.73 or 4.10 gears, your carrier works. If it has 4.56 or deeper gears, you need a 4.10-and-down carrier.
Front and rear ratios must match on a 4x4. If the rear axle is not already 3.73, re-gear it to 3.73 at the same time or the transfer case and tires will bind in four-wheel drive.
All pinion and carrier bearings and races, the pinion seal, crush sleeve and ring gear bolts. Inspect the yoke seal surface and replace the yoke if it is grooved.
