Revolution Gear & Axle Dana 60 Front Axle 3.55 Ratio Ring & Pinion Set
The 3.55 is the tall end of the Dana 60 ratio range. It is what you want when a heavy-duty truck with stock-size tires is turning too many rpm on the highway, when a diesel or big-torque engine swap no longer needs deep gears, or when a worn factory 3.54 or 3.55 set has started to whine under load. The Revolution Gear and Axle D60-355 is a new standard-rotation 3.55 ring and pinion for the Dana 60. The listing calls it a front axle set, but standard rotation means it belongs in a low-pinion Dana 60, front or rear, not in a high-pinion front.
The pinion takes torque from the driveshaft and turns the ring gear, which is bolted to the carrier with twelve 1/2 inch bolts. At 3.55 the driveshaft turns 3.55 times per wheel revolution, so the gears multiply torque less and cruise at lower engine speed than the 4.10 to 5.38 ratios most Dana 60 builders run. Revolution lists this set with a 9.75 inch ring gear, a 29-spline pinion, 8620 steel and a 4.10/4.56 carrier break. Because the Dana 60 is used under trucks that tow and haul, ring gear damage under load and worn pinion bearings are the common failures, and both show up first as noise.
Check two things. The first is rotation: if the front driveshaft enters the housing above the axle tubes, the axle is high pinion and needs a reverse set such as the Revolution Dana 60 reverse rotation set. The 1999-2016 Ford Super Duty front Dana 60 is the common high-pinion example, so this 3.55 is not for that axle. Our Dana 60 ring and pinion buyer's guide shows how to tell them apart. The second is the carrier: Dana 60 carriers split between 4.10-and-down and 4.56-and-up. A 3.55 runs in the 4.10-and-down carrier, so if your axle has been geared 4.56 or deeper you will need a different carrier to go back to 3.55. Also confirm your current ratio from the tag or by turning the driveshaft against the tire.
This set fits standard-rotation (low-pinion) Dana 60 axles with the 9.75 inch ring gear and 29-spline pinion. Revolution's own fitment list names the 1954-1986 Ford F-250, 1975-1978 F-350, 1955-1971 F-100 and 1963-1976 Jeep Wagoneer, and the same gears suit many other low-pinion Dana 60 rears and fronts under older GM, Dodge and Ford heavy-duty trucks and swap builds. Because Dana 60s were built in so many versions, match the rotation, ring gear size and pinion spline to your old gears, or send us your year, VIN and axle tag and we will check it. Other Dana 60 ratios and parts are on our hard parts page.
On a 4x4 the front and rear ratios must match exactly. Gears come without bearings, so install them with the Revolution Dana 60 master install kit or the USA Standard Dana 60 front master overhaul kit. The Dana 60 carrier is preloaded tightly in the housing, so a Dana 60 housing spreader makes removal and installation much easier without bending the housing. Revolution's setup chart for the Dana 60 lists a 0.052 in starting pinion depth, 17-30 in-lb pinion bearing preload, 0.006-0.010 in backlash, 110 ft-lb on the ring gear bolts and 80 ft-lb on the bearing caps. Use new ring gear bolts with thread locker, read the pattern on both drive and coast sides, and fill with 75W-90 or 75W-140 gear oil, adding friction modifier if the axle has a limited slip. Go easy for the first few hundred miles, then change the oil before you hook up a trailer.
| Brand | Revolution Gear & Axle |
| Part number | D60-355 |
| Fits | Revolution Gear & Axle Dana 60 Front Axle 3.55 Ratio Ring & Pinion Set |
| Type | Ring & Pinions |
| 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.
No. The 1999-2016 Super Duty front Dana 60 is high pinion and needs reverse rotation gears. This D60-355 is a standard rotation set for low-pinion Dana 60 fronts and rears.
Yes. Dana 60 carriers break between 4.10 and 4.56. A 3.55 uses the 4.10-and-down carrier, so an axle currently set up with 4.56 or deeper gears needs a carrier change.
Usually. 3.55 suits stock-size tires, light loads or high-torque diesel swaps that want low cruise rpm. Trucks on 35 inch and larger tires generally need 4.10 to 4.88.
A Dana 60 master install kit with pinion and carrier bearings, races, shims, pinion seal and ring gear bolts, plus marking compound and gear oil. Reusing old bearings with new gears is a common cause of noise.
75W-90 or 75W-140 gear oil. Add friction modifier if the axle has a clutch-type limited slip, and change the oil after the break-in miles.
