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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Wobbly Back Wheel?

  • Thread starter Thread starter Benz510
  • Start date Start date Sep 15, 2016

Benz510

Active Member
Feb 19, 2016
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Oakland California
Sep 15, 2016
#1
  • Sep 15, 2016
  • #1
Hey stangnet.

Been a while since I've asked for help. I've been told a couple of times that it looks like my back wheel on pass side seems wobbly while driving. Everything as far as lugs are torqued down. What should i check for? Bent axle?

Thanks
 

jrichker

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#2
  • Sep 16, 2016
  • #2
Possible bad bearing, or bad shock absorber or wheel out of balance.

Get out you floor jack, jackstands (a must have item!!) and chock the front wheels with a 4x4 or suitable wheel chocks..

Bearing problems:
Put the rear axle up on jackstands and see if you can shake the wheels up and down, fore and aft. Any difference between one side and the other is probably a worn bearing on the side with the most movement.

Axle problems:
While you have the rear axle up on jackstands, put the trans in 4th or 5th gear with the engine running at idle, or 30 MPH if you have working cruse control. Watch the wheels for wobble or excessive motion, that is a sign of a bent axle

Shock absorber problems.
II you didn't see or feel any wobble, then the rear shock absorber on that side may be bad Try bouncing each corner of the car up and down by pushing down on the fender or bumper vigorously. If it keeps moving after you stop pushing, the shock absorber is bad.

Wheel out of balance:
If you got this far and didn't find anything then, the wheel is probably out of balance.
 
Last edited: Sep 16, 2016

Benz510

Active Member
Feb 19, 2016
171
70
38
Oakland California
Sep 16, 2016
#3
  • Sep 16, 2016
  • #3
jrichker said:
Possible bad bearing, or bad shock absorber or wheel out of balance.

Get out you floor jack, jackstands (a must have item!!) and chock the front wheels with a 4x4 or suitable wheel chocks..

Bearing problems:
Put the rear axle up on jackstands and see if you can shake the wheels up and down, fore and aft. Any difference between one side and the other is probably a worn bearing on the side with the most movement.

Axle problems:
While you have the rear axle up on jackstands, put the trans in 4th or 5th gear with the engine running at idle, or 30 MPH if you have working cruse control. Watch the wheels for wobble or excessive motion, that is a sign of a bent axle

Shock absorber problems.
II you didn't see or feel any wobble, then the rear shock absorber on that side may be bad Try bouncing each corner of the car up and down by pushing down on the fender or bumper vigorously. If it keeps moving after you stop pushing, the shock absorber is bad.

Wheel out of balance:
If you got this far and didn't find anything then, the wheel is probably out of balance.
Click to expand...
Thank you sir. I will try and check this weekend.
 

Benz510

Active Member
Feb 19, 2016
171
70
38
Oakland California
Sep 19, 2016
#4
  • Sep 19, 2016
  • #4
Figured out it has a bent axle. They did a 5 lug drum conversion on the vehicle. What year aerostar or ranger axle do i need to buy?

Thanks in advance everyone,
Ben
 

jrichker

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#5
  • Sep 19, 2016
  • #5
An axle from a 94-98 Mustang is a simpler and easier solution; the 6 and 8 cylinder cars use the same axle.
 

Mustang5L5

That is…until I whipped out my Bissell
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Sep 19, 2016
#6
  • Sep 19, 2016
  • #6
Benz510 said:
Figured out it has a bent axle. They did a 5 lug drum conversion on the vehicle. What year aerostar or ranger axle do i need to buy?

Thanks in advance everyone,
Ben
Click to expand...


‘83 to ‘92 4 banger or 3.0L V6 Ranger/Bronco II with a 7.5″ rear end driver's side axle. It should measure 29-5/32″.

'86 to 97 Aerostar passenger side axles

It should measure 29-5/32″.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
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Sep 19, 2016
#7
  • Sep 19, 2016
  • #7
jrichker said:
An axle from a 94-98 Mustang is a simpler and easier solution; the 6 and 8 cylinder cars use the same axle.
Click to expand...

I think he's 5-lug drum. Sn axles won't work in this case.
 

Benz510

Active Member
Feb 19, 2016
171
70
38
Oakland California
Sep 19, 2016
#8
  • Sep 19, 2016
  • #8
Mustang5L5 said:
I think he's 5-lug drum. Sn axles won't work in this case.
Click to expand...

Correct. It's 5 lug drum in the rear.
 

Benz510

Active Member
Feb 19, 2016
171
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Oakland California
Sep 19, 2016
#9
  • Sep 19, 2016
  • #9
does the circled areas seem about right. The measurements seem to be in a different format on all the ones I've checked so far.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
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Sep 19, 2016
#10
  • Sep 19, 2016
  • #10
29 5/32 is 29.16.

28 spline is correct
 

Benz510

Active Member
Feb 19, 2016
171
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38
Oakland California
Sep 19, 2016
#11
  • Sep 19, 2016
  • #11
Mustang5L5 said:
29 5/32 is 29.16.

28 spline is correct
Click to expand...
Could you appoint me to the easiest place to buy this? I can't seem to find the right one with those specs.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,295
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Sep 19, 2016
#12
  • Sep 19, 2016
  • #12
I'd buy that one based on what you posted

0.02" is this much.



Sent from my big ass iPhone 6 using Tapatalk
 

Benz510

Active Member
Feb 19, 2016
171
70
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Oakland California
Sep 19, 2016
#13
  • Sep 19, 2016
  • #13
Okay. So the specs on the one i posted should work? I'll order it asap. Thanks!
 

Benz510

Active Member
Feb 19, 2016
171
70
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Oakland California
Sep 19, 2016
#14
  • Sep 19, 2016
  • #14
Another thing. My pops is telling me to go ahead and change the bearing also. I don't see why if it's not causing the problem but in case i do it should be the regular stock bearing correct?
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,295
17,998
224
Massachusetts
Sep 19, 2016
#15
  • Sep 19, 2016
  • #15
Or if you want new?

https://lmr.com/item/LRS-4234K-SN/Mustang-28-Spline-5-Lug-Axles-SN-Flange-Fox-Length-79-93

Rock auto does sell the axles individually new for $115. No idea if studs are included


Sent from my big ass iPhone 6 using Tapatalk
 

90sickfox

Wasn't a pretty sight...and I've got big hands
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Mar 2, 2015
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Sep 19, 2016
#16
  • Sep 19, 2016
  • #16
Glad you found the problem [emoji106]
 

Benz510

Active Member
Feb 19, 2016
171
70
38
Oakland California
Sep 20, 2016
#17
  • Sep 20, 2016
  • #17
Thanks to both of you gentleman.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,295
17,998
224
Massachusetts
Sep 20, 2016
#18
  • Sep 20, 2016
  • #18
Benz510 said:
Another thing. My pops is telling me to go ahead and change the bearing also. I don't see why if it's not causing the problem but in case i do it should be the regular stock bearing correct?
Click to expand...


Yeah. Stock bearings. And I agree with him. It's cheap, and you have the axle out already


Sent from my big ass iPhone 6 using Tapatalk
 
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