Can a bad pinion seal cause vibration?

Generally, worn out pinion bearings can create whirring noises at various speeds, be it may during deceleration and/or acceleration. If the pinion bearings are the problem, they create more of a whirring noise than a rumble because it turns several times faster than the carrier assembly.

Can you reuse a pinion seal?

You can reuse the pinion nut, but dab a liberal amount of thread locking compound on the threads. For axles with spacers, you can gun the pinion nut down with an impact gun and torque it to the proper spec. See all 10 photos. We finished up our seal install with some new U-joint U-bolts.

What causes a pinion seal to leak?

There are two problems to consider with a pinion seal leak. However, it is fairly common as well for the failure to be caused by too much runout of the pinion, caused by either incorrect preload on the pinion, or failure of the pinion bearing, the former often being caused by the latter.

Do you need to replace pinion nut?

Do not replace the pinion nut. You need to count the number of turns on the nut when replacing the pinion seal to get your bearing preload back.

Are pinion nuts one time use?

Reusing the original pinion nut is okay if you clean the pinion threads, the nut ( use some brake clean ) & use lock-tight or grind a grove in the pinion shaft torque the nut & peen the nut, or torque the nut & spot weld it on, but if you’ve a new nut use it & lock-tight it as well.

When to replace the front pinion seal on a 96 fzj-80?

The front pinion seal on my 96 FZJ-80 has been seeping for awhile so replaced it today. I marked the pinion nut, pinion shaft, flange, and 3rd member before starting the job, and I noted that there was barely one thread of the pinion shaft showing past the pinion nut.

What’s the correct way to replace a front pinion seal?

The “correct” way is to drop the third, pull the carrier, push out the pinion, inspect the bearings, install a new crush sleeve and set the preload. This is a significant job, so IMHO, the short cut is worth the risk. If the bearings start talking, will have to do the full job.

Where is oil Slinger on front pinion seal?

Middle photo shows the relationship of the oil slinger to the flange; when installed the slinger is right up against the rear bearings shown in the bottom photo. Seal part number, greased up new seal (greased the back side also around the spring), and the seal in place just before installing.

How do you remove a pinion nut from a screwdriver?

Once the pinion nut was off the pinion flange slid back and off the pinion shaft splines easily by pulling straight back, no hammer needed. I removed the pinion seal using a standard seal puller and a large screwdriver; it popped out after a few tries.

Why is my rear pinion seal not working?

Some vehicles have a rear pinion seal, where others have both a front and rear pinion seal, it just depends on the make and model of your vehicle and if the vehicle has rear or four wheel drive. Over time, the rubber on the pinion seal wears down and the seal will not be effective as it was before.

Where is the rear pinion seal located?

The pinion seal is located near the pinion shaft and is designed so that fluid does not leak out of the differential. Some vehicles have a rear pinion seal, where others have both a front and rear pinion seal, it just depends on the make and model of your vehicle and if the vehicle has rear or four wheel drive.

How much does it cost to replace a rear pinion seal?

On average for most vehicles, it costs about $120 to replace a rear pinion seal. The cost does vary depending on the type of vehicle and model, the type of parts to be used, and the labor charge which is dependent on the location and skills of the auto shops.

When to know if you have a pinion seal leak?

If you notice fresh oil, you have a pinion seal leak. As soon as you notice this, contact the professionals at YourMechanic to have the pinion seal replaced. 2. Differential has low fluid If you notice your differential has low fluid, chances are it is leaking from the pinion seal.