Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1987BRONCO 5.0 N, AUTOMATIC, AODREPAIR AND DIAGNOSIS (SINGLE PAGE)DRIVELINES & AXLESDIFFERENTIALS & DRIVE AXLESDRIVE AXLE - FULL FLOATINGOVERHAULDISASSEMBLY
1987 Ford Bronco 5.0 N, Automatic, AOD
Drive Axle - Full Floating: Overhaul: Disassembly
1987 Ford Bronco 5.0 N, Automatic, AODSECTION Disassembly
- Drain lubricant. Remove axle shafts and housing cover. If no side play is found in the differential case assembly, mount dial indicator on pilot stud with tip against back of ring gear. Measure runout of ring gear, marking ring gear and case at point of maximum runout.
- If runout total exceeds .006" (.15 mm), ring gear could be loose or case could be damaged. Using .003" (.08 mm) feeler gauge, try to force feeler gauge between cap and race. If it does, bearing race may have been turning in carrier.
- If race has been turning, carrier could be damaged. Observe identifying letters stamped into bearing caps and face of carrier sealing surface. Use these matched letters for reassembly reference.
- Remove side bearing caps. Use Housing Spreader (W-129-A on Model 44; D-167 on Models 60 and 70) to spread differential housing to .015" (.38 mm). See Fig 1
.CAUTION: DO NOT spread housing more than .020" (.51 mm). Permanent damage to housing could result.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.