Differential Housing Spreader Tool for Dana 60 Axle

If you are regearing or re-bearing a Dana 60 under a Ford Super Duty, a Ram 2500 or 3500, a Chevy or GMC HD, or a built Jeep, you already know the carrier does not just fall out. The side bearing shims are sized to hold preload, so the housing has to be opened slightly to get the carrier in or out cleanly. This bench-style housing spreader (manufacturer part number EG71ZF) does exactly that, and it also fits the rest of the Dana family from the 27 through the 80.

What the housing spreader does on a Dana 60

The Dana 60 is a Salisbury-style axle: the carrier sits in the center casting, and preload on the carrier bearings comes from shims stacked between the bearing cones and the case. When the stack is correct, the carrier is a press fit. The spreader engages the housing on either side of the carrier opening, and its center screw pushes the two sides apart by a few thousandths of an inch. That small stretch lets the loaded carrier, shims and all, go in or come out. When you back the screw off, the casting closes on the shims and the preload you calculated is the preload you get.

Watch the spread with a dial indicator mounted across the opening. Yukon's spreader instructions say never to spread a Dana housing more than .015 in, because going past that can permanently damage the casting. ARB's spreader guide gives 0.02 in as the absolute general limit and warns against spreading aluminum housings unless the vehicle maker says to. On a cast-iron Dana 60, treat .015 in as the ceiling and use as little as the job needs.

Symptoms that send a Dana 60 to the bench

• Whine that changes between drive and coast, a sign of worn pinion or carrier bearings or a gear pattern that has shifted.
• Growl or rumble that rises with road speed, typical of tired carrier bearings on high-mile tow rigs.
• Metal in the drained gear oil or on the drain plug magnet.
• A planned ratio change for bigger tires, or a locker or limited-slip swap.

All of these jobs end with the carrier coming out, and that is where this tool earns its price. Our Dana 60 rear axle problems guide walks through which noises point to bearings and which point to the gears.

How to confirm you need to pull the carrier

Drain the oil and look at it before you buy parts. Check pinion yoke play by rocking it in and out, and spin the carrier by hand with the axles pulled to feel for roughness. If you are going in for new gears, read the backlash and pinion depth setup guide first, because the spreader is used twice: once to pull the old carrier, and again on every shim change while you chase the pattern.

Fitment

The listing covers Dana 27, 30, 44, 45, 50, 53, 60, 61, 70, 70U, 70HD and 80 housings. The frame is 18.11 in long by 14.8 in wide, powder-coated steel, and weighs about 40.9 lb, so plan on using it at the bench or with the truck on stands. On some full-float Dana 60 front housings the arms sit close to the cover flange, and suspension or steering parts can be in the way on an axle still under the truck. Check clearance before you load the screw. The tool does not apply to corporate axles such as the Ford 8.8 or GM 10-bolt, which set preload with adjusters or press-on shims instead. Browse the rest of our differential and transmission tools for pullers and drivers.

Install notes

• Clean the housing and mount the spreader square, top and bottom, so the screw pushes evenly.
• Zero a dial indicator across the opening, then turn the screw only until the carrier moves. Stay at or under .015 in.
• With the housing spread, the carrier should still need light taps to seat. If it drops in freely, the shim stack is too thin and preload will be low.
• Release the spreader fully before torquing the bearing caps, then check backlash and the pattern.
• Refill with 75W-90 or 75W-140 gear oil as your axle calls for, plus friction modifier for a clutch-type limited slip.

Building a new gear set? Pair the tool with a Dana 60 front 3.55 ring and pinion or a 35-spline Detroit Truetrac, and finish the job with a nodular iron Dana 60 cover. Running an ELocker? The ELocker Dana 60 service kit is a carrier-out job too.

Do I really need a spreader on a Dana 60?

Dana sets carrier bearing preload with shims, so a correctly shimmed carrier is a press fit. You can pry or drive it, but that risks nicking the bearing bores and gives you a preload you cannot trust. A spreader with a dial indicator is the controlled way to do it.

How far should I spread the housing?

Only enough to move the carrier. Yukon's instructions put the limit at .015 in measured with a dial indicator across the opening, and ARB says never past 0.02 in. Over-spreading can permanently distort the casting.

Will it work on my Dana 44 or Dana 80 too?

The listing covers Dana 27, 30, 44, 45, 50, 53, 60, 61, 70, 70U, 70HD and 80. Check that the arms clear the cover flange and any suspension parts on your specific housing before loading the screw.

Can I use it on a Ford 8.8 or GM 10-bolt?

It is built for Dana housings. Most corporate axles set preload with threaded adjusters or shims behind the bearings and do not call for a spreader, so this is not the right tool for them.

Does the carrier drop right in once the housing is spread?

It should not. Even with the housing spread you should need light taps to seat it. A carrier that falls in freely means the shim stack is too thin and preload will be low once the spreader is released.

How heavy is it?

About 40.9 lb, with an 18.11 in by 14.8 in powder-coated steel frame. It is a bench and stand tool, not something for a roadside toolbox.