Differentials or bearings ODD noise
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Differentials or bearings ODD noise
Differentials or bearings ODD noise
Have a 1989 f-150, 2wd automatic.
Currently, I am hearing a rubbing (brrrrrrrrrr) sound when I believe rear wheel turn. For example the faster I go the louder and quicker sound is made.
I did jacked front end of car up. I checked the front bearings / brakes and this looked ok.
This is making me think something is up with rear end? My plan was to check / change rear differential fluid? This needs to be done but I dont believe this is related to sound and symptoms I am hearing.
I will confirm This trucks has sat stationary for a while (winter) snow in back. Any thoughts on how to isolate issue.
Thanks in advance for all thoughts I am always open to learning.
Have a 1989 f-150, 2wd automatic.
Currently, I am hearing a rubbing (brrrrrrrrrr) sound when I believe rear wheel turn. For example the faster I go the louder and quicker sound is made.
I did jacked front end of car up. I checked the front bearings / brakes and this looked ok.
This is making me think something is up with rear end? My plan was to check / change rear differential fluid? This needs to be done but I dont believe this is related to sound and symptoms I am hearing.
I will confirm This trucks has sat stationary for a while (winter) snow in back. Any thoughts on how to isolate issue.
Thanks in advance for all thoughts I am always open to learning.
Member
Joined: Jan 2009
Posts: 47
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From: Memphis, TN
I would first start off checking the driveshaft for play in the ujoints.
If that checks out, then pull the diff cover off and have a look inside. Clean everything out and get you some marking fluid or even dark grease and check wear pattern against "acceptable" standard pattern. If everything inside seems okay, then pull the c-clips out and pull those axles and look for scoring/pitting on the load surfaces that make contact with the bearings. If everything appears ok after doing all that, then I would check your rear suspension for possible misalignment or bad pinion angle.
Another shot in the dark that mainly happens on 4x4 front diffs is corrosion on the ring gear and pinion from lack of lubrication. My old 84 F150 has manual hubs so I can shift into 4WD on the road and freewheel the front hubs to allow the front diff to stay coated in gear oil. A lot of vehicles, especially if there was any water intrusion in the diff that sit up for months on end are susceptible to rusting/corrosion inside.
If that checks out, then pull the diff cover off and have a look inside. Clean everything out and get you some marking fluid or even dark grease and check wear pattern against "acceptable" standard pattern. If everything inside seems okay, then pull the c-clips out and pull those axles and look for scoring/pitting on the load surfaces that make contact with the bearings. If everything appears ok after doing all that, then I would check your rear suspension for possible misalignment or bad pinion angle.
Another shot in the dark that mainly happens on 4x4 front diffs is corrosion on the ring gear and pinion from lack of lubrication. My old 84 F150 has manual hubs so I can shift into 4WD on the road and freewheel the front hubs to allow the front diff to stay coated in gear oil. A lot of vehicles, especially if there was any water intrusion in the diff that sit up for months on end are susceptible to rusting/corrosion inside.
