Rear end noise - axle bearing?

mpj76 · 07-06-2005, 10:55 AM

I hear a humming "wah wah wah" sound coming from the rear end that increases with vehicle speed. After jacking it up and putting it in neutral, I noticed that the driver side rear wheel is hard to turn throughout half of its rotation. The passenger wheel spins easily. Does this sound like an axle bearing problem? How can I verify?

Stock 91 5.0 LX
185,000 miles

mustangibew · 07-06-2005, 12:35 PM

Mine did that and it was the pinion bearing. Yours may or may not be that.

mpj76 · 07-13-2005, 09:48 AM

How do you change the pinion bearing? Is this something I can do myself? I know that messing around with the ring and pinion is something that is often recommended for a shop to do because of tolerances and adjustments.

mustangibew · 07-13-2005, 11:39 AM

My rear end was making a wahh wahhhh wah wah wahh wahh sound so I took it to a shop and that is what they found it to be. I had them fix it so i couldnt tell you how to do it.

mpj76 · 07-13-2005, 12:13 PM

Do you remember what they charged you?

mustangibew · 07-13-2005, 12:25 PM

Not for that exactly because i also had them change my gears from 4:10's back to my 3:55's and put new brake pads on while they were at it and fix my drivers side power window. All that came to around 500$

07-06-2005, 10:55 AM	#1
mpj76 Registered Member Join Date: Sep 2002 Posts: 158	Rear end noise - axle bearing? I hear a humming "wah wah wah" sound coming from the rear end that increases with vehicle speed. After jacking it up and putting it in neutral, I noticed that the driver side rear wheel is hard to turn throughout half of its rotation. The passenger wheel spins easily. Does this sound like an axle bearing problem? How can I verify? Stock 91 5.0 LX 185,000 miles __________________ 91 Coupe: FMS 1 5/8 unqual shorty's, BBK off road X-pipe, Super Duty T5, Pro 5.0 short shifter, 2.73 rear, G3 alt, MSD coil, dist, no smog pump, oil cooler, 195K miles, 14 deg timing, 23 mpg city/29 mpg highway @ 65 mph.

07-06-2005, 12:35 PM	#2
mustangibew mustangibew Join Date: Jun 2005 Location: Raytown,Missouri Posts: 14	Re: Rear end noise - axle bearing? Mine did that and it was the pinion bearing. Yours may or may not be that. __________________ GIT-R-DONE !!! Check profile to see my homepage where pic's of my car are at. Also have old dyno sheet on page 2

07-13-2005, 09:48 AM	#3
mpj76 Registered Member Join Date: Sep 2002 Posts: 158	Re: Rear end noise - axle bearing? How do you change the pinion bearing? Is this something I can do myself? I know that messing around with the ring and pinion is something that is often recommended for a shop to do because of tolerances and adjustments. __________________ 91 Coupe: FMS 1 5/8 unqual shorty's, BBK off road X-pipe, Super Duty T5, Pro 5.0 short shifter, 2.73 rear, G3 alt, MSD coil, dist, no smog pump, oil cooler, 195K miles, 14 deg timing, 23 mpg city/29 mpg highway @ 65 mph.

07-13-2005, 11:39 AM	#4
mustangibew mustangibew Join Date: Jun 2005 Location: Raytown,Missouri Posts: 14	Re: Rear end noise - axle bearing? My rear end was making a wahh wahhhh wah wah wahh wahh sound so I took it to a shop and that is what they found it to be. I had them fix it so i couldnt tell you how to do it. __________________ GIT-R-DONE !!! Check profile to see my homepage where pic's of my car are at. Also have old dyno sheet on page 2

07-13-2005, 12:13 PM	#5
mpj76 Registered Member Join Date: Sep 2002 Posts: 158	Re: Rear end noise - axle bearing? Do you remember what they charged you? __________________ 91 Coupe: FMS 1 5/8 unqual shorty's, BBK off road X-pipe, Super Duty T5, Pro 5.0 short shifter, 2.73 rear, G3 alt, MSD coil, dist, no smog pump, oil cooler, 195K miles, 14 deg timing, 23 mpg city/29 mpg highway @ 65 mph.

07-13-2005, 12:25 PM	#6
mustangibew mustangibew Join Date: Jun 2005 Location: Raytown,Missouri Posts: 14	Re: Rear end noise - axle bearing? Not for that exactly because i also had them change my gears from 4:10's back to my 3:55's and put new brake pads on while they were at it and fix my drivers side power window. All that came to around 500$ __________________ GIT-R-DONE !!! Check profile to see my homepage where pic's of my car are at. Also have old dyno sheet on page 2

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