Description

Dana Spicer 50 Service Manual – Factory Specs for the Model 50 Axle

If you’ve ever had a wheel bearing seize because the aftermarket manual told you to pack it with the wrong grease, you know the frustration. Or maybe you’ve stripped a yoke nut using a generic torque value that was off by 20 ft-lbs. That’s why I won’t touch a Dana Spicer 50 axle without the real OEM documentation sitting on the bench next to my torque wrench. This Service Manual for the Dana Spicer model 50 independent front suspension axle is the original factory print—not a third-party rewrite. It runs 34 pages and covers exactly what you need to service, lubricate, and rebuild this axle without guessing.

Lubrication Specs That Match the Climate

Page 3 of the manual gets straight to the point: SAE 90 GL-5 gear lube meeting Mil. Spec. L-2105-B as a baseline. If you’re operating below 0°F (-18°C), it calls for SAE 80 GL-5. That’s the difference between a bearing that spins freely and one that starves at startup. The wheel bearing lubrication section on that same page specifies packing with grease—not just slathering it on. I’ve seen too many diy guys dump a tube of chassis grease in there and wonder why the hub runs hot. This manual nails the type and the method. No guesswork.

Identification of Service Tools – Don’t Improvise

Page 4 lists the factory tool numbers for all special tools needed. These are Miller Special Tools numbers (from Miller, Garden City, Michigan). Dana doesn’t warranty any substitutions, and neither should you. The manual states that clearly: use non-recommended tools at your own risk. If you’re pulling a yoke shaft bearing, you’ll need the correct puller and installer. The part numbers are printed right there so you can order them or cross-reference. I’ve seen too many hacks use a pickle fork and dent the housing. Don’t be that guy.

Disassembly of Wheel Ends – 7 Pages of Procedure

Starting on page 7, the manual walks through the wheel end teardown. Spicer axles use a specific order: remove the hub cap, cotter pin, spindle nut, then slide the hub off. The manual includes the torque spec for the spindle nut—something aftermarket manuals often skip. You’ll also find the step for pulling the brake drum and the inner bearing cone. If you skip the order, you can damage the threads or drop the bearing. I’ve had to helicoil a spindle because someone rushed it. Stick to the sequence on page 8.

Servicing Differential Yoke Shaft Bearing – Page 13

This section covers the yoke shaft bearing replacement. The manual tells you to remove the yoke nut (torque spec provided), then use a puller to extract the bearing cone. It also includes the installation procedure with the correct seal driver tool. If you don’t seat the bearing fully, the yoke will wobble and chew up the seal. Page 13 gives you the exact depth and tool number. No guesswork.

Carrier Section – Page 19: Rebuild the Heart of the Axle

Page 19 starts the carrier section. This is where you disassemble the differential case, remove the ring gear, and replace bearings. The manual provides the shim selection procedure for setting pinion depth and backlash. I’ve seen guys use a dial indicator without knowing the factory preload spec for the carrier bearings. It’s on page 22. If you’re rebuilding a Spicer 50 carrier, you need this data. Aftermarket manuals often give a generic range—this one gives the exact factory numbers.

Source Validity – OEM vs Aftermarket

This is a scan of the original Dana Spicer publication. Not a reprint, not a compilation. The index at the front mirrors the actual factory booklet. The safety notice on page 2 warns against using non-original replacement parts because they can cause unit failure and affect vehicle safety. That’s straight from Dana’s engineering department. I trust a manual that tells you upfront what can go wrong. If you’ve been burned by a chinese knock-off manual with blurry diagrams and missing torque specs, you’ll appreciate the clarity here.

Who Needs This Manual

If you’re a shop owner in San Antonio like me, you’ve got customers with Ford trucks, Jeeps, or industrial equipment running a Dana 50 front axle. Or maybe you’re a farmer maintaining a loader or a DIYer rebuilding a vintage 4×4. This manual is for anyone who needs to service the wheel ends, differential, or carrier on a Spicer Model 50. The 34 pages are laser-focused on that one axle. No fluff, no extra models thrown in to bulk up the page count.

FAQ

Does this manual cover the Spicer 50 rear axle?

No. This manual covers only the Model 50 independent front suspension axle. The rear axles have different carrier and hub setups. For rear axle info, look at related manuals like the Dana Spicer 1372-A Service Manual – Factory Specs & Rebuild Guide”> or the Dana Spicer ES60-5, CM59, ES60-5A, ES60-5C, ES60-5D Service Manual”>.

What if my manual is missing pages?

This is a complete 34-page digital access. The PDF is scanned from the original factory document. Check the page count before you access. If you need a second opinion, compare the TOC to the OCR text we provided. We don’t sell partial manuals.

Look, I’ve been turning wrenches for 28 years. I’ve seen what happens when you rely on a generic manual for a Dana Spicer 50 axle. Leaks, bearing failures, and comebacks that cost you money. This is the real deal—factory specs, OEM torque values, and the exact lubrication recommendations Dana Spicer engineers wrote. If you want to do the job right the first time, Access the Factory Manual now and keep it on your bench.

Related manuals you might need: Dana Spicer ES46-5 ES56-5 2002 Service Manual – 40 Pages of Factory Specs”>. For understanding basic transmission concepts, check Manual Transmission”> and Manual Transmission”>.