Ford F87Z-4234-BA Shaft

You can Select Your Vehicle to check if F87Z-4234-BA fits your vehicle.

The rear axle assembly is a hypoid semi-floating type, featuring a differential carrier made from casting with a pressed steel cover, while the axle tubes are constructed from steel, pressed and welded into the carrier. An optional Traction-Lok limited slip rear axle is available, which operates normally until one wheel loses traction, utilizing multi-disc clutch packs and a speed-sensitive engagement mechanism to lock both axleshafts together, providing equal rotational power to both wheels. Knowing the axle identification number, located on a small metal tag near one of the cover bolts, is crucial for certain operations, especially when replacing the axleshafts. Often, issues suspected in the rear axle area may actually originate elsewhere, so a thorough check is advisable before concluding a rear axle problem. Common noises associated with rear axle diagnosis include road noise, which can be mistaken for mechanical faults and remains consistent regardless of vehicle power; tire noise, which can arise from worn or under-inflated tires and remains constant during various driving conditions; and engine and transmission noise, which can mislead diagnostics as it travels along the driveline. To isolate such noises, noting the engine speed at which the noise is most pronounced and then running the engine in Neutral at the same speed can help determine if the rear axle is at fault. Overhaul and general repair of the rear axle require special tools and critical measurements, making it beyond the scope of the home mechanic, with procedures involving axleshaft removal and installation, oil seal replacement, bearing replacement, and complete unit removal for repair or replacement.

Remove the nuts and bolts that secure the brake backing plate to the axle. Carefully separate the backing plate from the axle housing and support it with wire, ensuring not to bend the brake line or allow the backing plate to hang on the line. Separate the backing plates from the axle and tie them up out of the way.

Use a puller to press it out. Once loose from the hub splines, pull out on the steering knuckle assembly and guide the outer CV joint out of the hub.

Detach the vent hose from the axle housing. The vent hose is secured to the axle by a crimp-type clamp, which needs to be replaced with a screw-type clamp.

Install the brake drums.

If the retainer ring is not fully seated, the driveaxle seal will leak, the hub and bearing assembly will be contaminated, and the vehicle will not operate in 4WD.

Clean all dirt and grease from the spindle bore and ensure there are no nicks or burrs in the bearing bore.

The common noises associated with rear axle diagnosis procedures include: Road noise: Often mistaken for mechanical faults. Driving the vehicle on different surfaces will show whether the road surface is the cause of the noise. Road noise will remain the same if the vehicle is under power or coasting. Tire noise: Sometimes mistaken for mechanical problems. Tires that are worn or low on air pressure are particularly susceptible to emitting vibrations and noises. Tire noise will remain about the same during varying driving situations, whereas rear axle noise will change during coasting, acceleration, etc. Engine and transmission noise: Can be deceiving because it will travel along the driveline. To isolate engine and transmission noises, note the engine speed at which the noise is most pronounced. Stop the vehicle, place the transmission in Neutral, and run the engine to the same speed. If the noise is the same, the rear axle is not at fault.