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front end vibration
#41
Hello,

Just catching up on these most recent posts. When I last had the Magnum 500 wheels balanced I told the tech that they had to be balanced "lug centrically" He used an adapter that attached thru the 5 lug holes. Was this the correct way to balance ? I will look at my lug holes over the next few weeks and see if they have worn in an elliptical fashion. Also double check the torque, beleive they are torqued to 80 lbs. Am also going to check the steering coupler/rag joint for excessive play, believe it to be original to the car. Having trouble finding a reputable shop that knows how to address this issue, will continue to look. Thanks for all the great suggestions !
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#42
The rag joint would not be the source. 
Just some new thoughts I have. If this vibration is a harmonics situation on other models that Ford wanted to have a smoother ride and better overall feel they did one thing different. If you got a better model the driveshaft will have a harmonic balancer on the front end of it. What made me recall this I was cleaning up in the garage and found a driveshaft I took out of a Granada which was pretty much the same type unitized body as the Mustang, front spindles with interchange just different tie rod connection. They added that so that it cancelled out any harmonics that might come into play at different speeds or RPMs. They did not worry about that on low end models like the Mustang. They put them on several of the V-6 models due to a V-6 cannot be balanced to zero neither can a V-8 only inline 6 and V-12 can have perfect balance. I think even Ranger P.U. had them due to vibration issues.
I can get you a picture of it and you should be able to add as long as it clears everything under the car. I did find a stock picture on the net of one. [Image: CV-Slip-Yoke-Balancer.jpg]


When a man is in the woods and talks and no women are there is he still wrong??
Tongue
David
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#43
The vibration has to be caused by something that rotates faster than you can turn the steering wheel.

Yes, lug centric balancing is required for wheels that do not have a center hole that is machined to fit the exact size of the hub. I believe that aftermarket Magnums fit that category. However, just because they balanced it correctly does not mean it is correctly balanced. Balancing machines have to be maintained and calibrated. I have encountered tire places that have balancers that should be called un-balancers. Every time they balanced the same tire/wheel the weight locations changed.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#44
The tire wheel scenario should be easy to eliminate. Just swap them out for some others that you borrow from a friend.
These cars do not ride like a cloud never have and never will were not meant to be luxury riders they were kind of middle of the road. You had Pinto and Maverick below them.
Wish we could see, feel what you are experiencing might be normal.


When a man is in the woods and talks and no women are there is he still wrong??
Tongue
David
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#45
Hello, what I am feeling is definitely not normal. It really does feel like something in the front wheels it’s sort of a shake or oscillation....is still more back-and-forth. It really does feel like tire balance but I’ve had them balanced. I checked the rag joint today and I think it’s fine. If you turn the wheel very hard left or right the metal pins do hit the metal part of the steering linkage but very little play and I don’t think that’s it. Any opinion on what the magnum 500 wheels should be torque to ...the Lugnuts I mean. I may have to try to find a very highly recommended garage and see if they can re-check the balance using the adapter you have spoken up. Thanks for your help
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#46
(12-08-2019, 05:50 PM)naa10104 Wrote: Hello, what I am feeling is definitely not normal. It really does feel like something in the front wheels it’s sort of a shake or oscillation....is still more back-and-forth. It really does feel like tire balance but I’ve had them balanced. I checked the rag joint today and I think it’s fine. If you turn the wheel very hard left or right the metal pins do hit the metal part of the steering linkage but very little play and I don’t think that’s it. Any opinion on what the magnum 500 wheels should be torque to ...the Lugnuts I mean. I may have to try to find a very highly recommended garage and see if they can re-check the balance using the adapter you have spoken up. Thanks for your help

" Back and forth " smells like strut rods moving ?  Have you checked these for chewed out bushings, loose bolts on the lower control arms etc. ? 

Are the control arms themselves secure ?

Can you lift the front end slightly to take the weight off the wheels and move as you describe ?  You're running out of options.
PKJ
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#47
I just checked the Ford manual for wheels torque is 70 - 115 ft. lbs. That is from page 11-01-02 Volume 1 Chassis manual, 1972, I do mine 100 all the time. You of course do them in steps probably 50, 80 then 100 and jump back and forth as you go never just go around the clock tightening them.


When a man is in the woods and talks and no women are there is he still wrong??
Tongue
David
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#48
(12-09-2019, 09:43 AM)Carolina_Mountain_Mustangs Wrote: I just checked the Ford manual for wheels torque is 70 - 115 ft. lbs. That is from page 11-01-02 Volume 1 Chassis manual, 1972, I do mine 100 all the time. You of course do them in steps probably 50, 80 then 100 and jump back and forth as you go never just go around the clock tightening them.
Thanks very much !
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