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Symptoms of a Bad or Failing Pinion Shaft Oil Seal
Common signs include leaking, low fluid in the differential, and grinding noises when the vehicle is running.
Symptoms of a Bad or Failing Pinion Seal
Common signs include a leaking pinion seal, low fluid in the differential, and a whining noise while the vehicle is in motion.
How to Check a Front End Assembly
If you have worn out components on your front end assembly, it can cause a number of issues with your car. Depending on the vehicle, your front end...
How to Replace a Pinion Seal
A pinion seal keeps oil in the differential and keeps water, dirt, and debris out. A failing pinion seal will leak which can ruin the differential.

Related questions

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Vent system malfunction
It is highly unlikely that these two issues are related. The issue you are likely having is that the mode door actuator has failed. The mode door actuator controls the mode door which will move in different directions to block...
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Loose Steering? 2012 GMC Sierra 1500
Hey there. I would suggest having the inner and outer tie rods checked for looseness and replaced if any play is found. When checking the rack and pinion mounts and bushings there should also be no looseness. The steering's free...
Question
Can a used rack and pinion from Cadillac fwd be used on a Grand AM
You would have to do a lot of measuring to the two different components to see if the racks are the same. Even if the racks are the same, the inner and outer tie rods may be different. If they...
Question
Clunking car when I go over bumps
Basically, any bolted on or "jointed" moving part or bushing could account for noise in the front end. Not included in your list are rack and pinion mounts/bushings, strut bearings, tie rod ends, even brake parts (caliper torque plate), loose...
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High-pitched noise
High pitch brake noises are usually caused by the wear indicator on the brake pads. This is a thin piece of metal that makes contact with the rotor with the brake pad lining gets to about 20%. The noise is...
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Pinion bearing making noise
The pinion bearing is a common issue with Ford rear ends. Most of the time, this failure is due to a differential leak that was not addressed and the bearing run dry. I recommend having a trained technician, such as...
Question
Rear differential noise
The noise is not coming from the pinion seal, but the pinion bearings are bad and this is why the pinion seal is leaking. You will need to have the rear end bearings and seals replaced. If you'd like to...
Question
Dana35 rear differential pinion bearing is shot and not sure if it can be pulled through the hole for the drive shaft
You have two pinion shaft bearings. The one that can be replaced by removing the driveshaft and flange on the rear end. You remove the seal and the bearing can be removed. The bearing race cannot be replaced this way...
Question
Mileage is very low;
If you have not had any maintenance done then have a complete computer scan test done to see if any codes are present. Perform any maintenance needed like air filters, fuel filters, and oil changes. You didn't mention the mileage...
Question
Rack and pinion
Was the power steering system flushed at the time of the service? Dirty fluid or a misalignment can cause the power steering pump to groan when turning the wheel. Return to the facility that performed the repair and have them...
Question
No power steering in Proton Saga
Here's the thing--power steering fluid is what gives you power. The pump pumps it, sends the power to the rack, which makes it easy to turn. If it all leaked out and you drive it, it will burn the power...
Question
Huracan 5.0. creates white smoke on colder days
It probably is the valve seals. You want to hope it's not the head gasket blown. To check the head gasket is simple. I've got a video that tells you if your head gasket is blown. It's a simple test--the...
Question
What is the difference between a pinion seal and a pinion flange?
Hello there, thanks for your question. The pinion flange is a part of the rear differential housing that the driveshaft bolts to. The other end is attached to the pinion gear inside of the differential. The pinion seal is what...
Question
Differential fill plug can't be removed - 1984 Chevrolet K20
Hi there, thanks for your question. A few different differentials were offered in trucks like yours, so I'm not sure which one you have. In some cases, there are aftermarket differential covers available that include a fill plug. If not,...
Question
Replacing pinion bearing on a 2002 Ford Explorer
Yes, why not get a used unit? Unfortunately, replacing those pinion things is a very complex and involved job. You need years of experience for a job like this. Now, sometimes I would take the differential off of a...
Question
Leak at the top of the pinion gear. Not much, can smell the burning fluid. Use Lucas oil or replace the whole rack.
I would replace the whole rack and pinion. You could try a rebuild kit if you want but as a technician I would suggest getting a new one. If you would like to verify the cause of the leak before...
Question
steering has been stiff lately and there is a squeak coming from rack and pinion
I believe that the issue you are having is due to your rack and pinion. If you are hearing a squeaking sound from the rack and pinion, there is likely a restriction in your rack and pinion most likely due...
Question
What are the signs and symptoms of a leaking rack and pinion?
Motor vehicle safety inspections in almost all U.S. jurisdictions do not cover maintenance and ordinary wear and tear, including de minimus "leaks", unless the "defect" found creates an immediate, obvious, and direct impact on the safety of the vehicle or...
Question
What are the advantages of pitman arm steering over rack and pinion steering?
There are very few advantages to the pitman arm style over the rack and pinion style. The rack and pinion style has less moving parts and, therefore, less causes of failure. The rack and pinion system is also lighter in...
Question
Rear pinion seal leaking. Would i also need to change the flange?
The flange is integral with a splined yoke. The yoke segment (of the flange/yoke) has a precision, machined, highly polished surface which mates with the rubber seal. Since the rubber seal is spring loaded and is under tension against the...

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