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my mark dose not ride comfortable anymore
#1
I have upgraded all struts and shocks to KYB and the KYB strut mounts( per the tech page) i replaced 1 driver side wheel bearing, had an alignment and balanced all 4 tires. lots of vibration at high speed 65 to 90. possible causes other than the left front tire having cupping due to bad shock and bearing.

I am thinking of doing rack bushings, motor mounts,trans mount and body bushings, as these have never been done since i bought car in 2004, may be OE.

sway bar link and bushings are good not broke or deformed, sway bar frame bushings replaced when i put on TC sway bar and adco rear in 2006 or 2007. I have not replaced in control arm bushings.

Am I headed in right direction, the front tire with the cupping wear an issue should i replace with new?
[SIGPIC][/SIGPIC]



[COLOR="Silver"]1991 light T/P LSC[/COLOR]/ BBK Catted X-Pipe/1 5/8 short headers, 3.73 gears/Mac Cover.Blue 9MM wires,MSD dist. Cap and coil. TC front Sway Bar/addco 415G rear, GT40p heads, TFS valve and spring kit, BBK CAI, Cobra Intake, 65MM TB,SVO 1.6 RR(dyno and SCT Tune shortly.

1991 Ebony Clear coat SE/Triple Black/Built AOD-2800 TC/Pauls red trans bushings/Sunroof/Sport Seat Delete

[COLOR="Red"]1992 Electric Currant" Red SE[/COLOR]/SunRoof/White Interior(needs some work)
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#2
You're on the right track. You have done an alignment, right?
I'd start with the tires; swap front to back (zero cost). If it's the cupping the vibration should change characteristics if not go away completely.
Then examine the front control arm bushings, especially the rear ones. Look for movement under gentle prying with a long prybar and/or gross rubber displacement/cracking. These take most of the braking forces and could make lots of vibration and noise. Urethane replacement here could make a big improvement apart from the vibration. You'll find the ES number in the parts interchange thread. An alignment with new control arm bushings will be in order.
Keep us posted.
W. V. Kelly

I expect to be in your neighborhood late on the 4th; PM me your phone number and maybe we could meet somewhere along 99.
ThreepointsevenLSCs/zeropointthreeXJSs
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#3
like stated a tire rotation is a definite. all other info posted would be secondary, meaning i would do the rotation first. drive and see how that did.if not, then move to the other suggested items.
1990 LINCOLN MARK VII





LINCOHOLICS 4 LIFE



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#4
I have staggered tires so I can't rotate. Might as well buy a new tire.
I did 4 wheel alignment.
Bushings need replaced as I suspect they have been there a while.

On the 4th I will be in Daly city
We are at seal
Rock Inn now for the weekend.
Low clouds now, wanted Korean BBQ tonight. But now parking in this city.

[SIGPIC][/SIGPIC]



[COLOR="Silver"]1991 light T/P LSC[/COLOR]/ BBK Catted X-Pipe/1 5/8 short headers, 3.73 gears/Mac Cover.Blue 9MM wires,MSD dist. Cap and coil. TC front Sway Bar/addco 415G rear, GT40p heads, TFS valve and spring kit, BBK CAI, Cobra Intake, 65MM TB,SVO 1.6 RR(dyno and SCT Tune shortly.

1991 Ebony Clear coat SE/Triple Black/Built AOD-2800 TC/Pauls red trans bushings/Sunroof/Sport Seat Delete

[COLOR="Red"]1992 Electric Currant" Red SE[/COLOR]/SunRoof/White Interior(needs some work)
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#5
The front will take up to at least 255/50-16 and the equivalent diameter 17/18. If you're within those sizes it's the quickest/cheapest way to possibly rule out the tires.

Daly City, eh? Just up the road from our old townhouse in Westborough. Make it a safe one.
W. V. Kelly
ThreepointsevenLSCs/zeropointthreeXJSs
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#6
I have 315 out back, i may have a buddy with a decent 245 for me to check it out on.

I have LCA and UCA fro the rear Lower all ploy and the upper are ploy/rubber, was saving them for the Red SE, but I will be testing everything I plan on DD LSC, going to trim the heard pretty soon, will only have the Red SE , wifes Linc LS(when I find a decent one) and a Black 98 MK8 LSC( they new DD) Actully thats not trimming the heard, just swamping 2 for 2.

we had great time in SF around the Point Lobos area Sutro trials, had Korean BBQ in the Sun Set District.

I will be leaving for my Brothers around Noon time the 4th, so if you are near before that time give a call.
[SIGPIC][/SIGPIC]



[COLOR="Silver"]1991 light T/P LSC[/COLOR]/ BBK Catted X-Pipe/1 5/8 short headers, 3.73 gears/Mac Cover.Blue 9MM wires,MSD dist. Cap and coil. TC front Sway Bar/addco 415G rear, GT40p heads, TFS valve and spring kit, BBK CAI, Cobra Intake, 65MM TB,SVO 1.6 RR(dyno and SCT Tune shortly.

1991 Ebony Clear coat SE/Triple Black/Built AOD-2800 TC/Pauls red trans bushings/Sunroof/Sport Seat Delete

[COLOR="Red"]1992 Electric Currant" Red SE[/COLOR]/SunRoof/White Interior(needs some work)
Reply
#7
We put the Mustang higher durometer rubber bushings on the UCAs and they're still there with no ill effects. At the same time those went on we tried polyurethane on both ends of the lowers. They lasted a day before the stock ones went back on (spare set of arms). They were stiff, all right, and noisy; very noisy. We didn't bother to assess the cornering and transition performance knowing we couldn't live with the noise. We may try urethane on one end only but I'm guessing that, too, will be noisy. Keep a stock set just in case.
W. V. Kelly
ThreepointsevenLSCs/zeropointthreeXJSs
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#8
I concur with W.V. . I recommend you go with rubber if at all possible if ride comfort is on your list, unless all your roads are smooth as glass. I'm Happy with the stock larger 1-1/8" stock sway bar for handling and urethane end link bushings though they may be a little loud over bumps. You should have all you should need for cornering with the TC and addco bars unless you intend to road rally. The day I put the urethane on the rear LCA I immediately felt it in my lower back. But that was all I could find. Most state you should go with rubber on the rear UCA because of the mount angle and to allow the movement.
91 LSCSE Electric Currant Red

Stk. 1.125" swaybar w/ Moog Rubber mounts

Moog LCA bushings, ball joints, Inner and outer tie rods, Reman rack

E.S. urethane end link bushings on OEM links

Steeda rear lower control arm bushings

Moog rubber upper control arm bushings

Motorcraft Struts, Moog Mounts, Koni Red shocks
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#9
I got around to putting new tires on front rides better,high speeds much better, back to cruising to work at 95.
Still need to do the bushings all around.
[SIGPIC][/SIGPIC]



[COLOR="Silver"]1991 light T/P LSC[/COLOR]/ BBK Catted X-Pipe/1 5/8 short headers, 3.73 gears/Mac Cover.Blue 9MM wires,MSD dist. Cap and coil. TC front Sway Bar/addco 415G rear, GT40p heads, TFS valve and spring kit, BBK CAI, Cobra Intake, 65MM TB,SVO 1.6 RR(dyno and SCT Tune shortly.

1991 Ebony Clear coat SE/Triple Black/Built AOD-2800 TC/Pauls red trans bushings/Sunroof/Sport Seat Delete

[COLOR="Red"]1992 Electric Currant" Red SE[/COLOR]/SunRoof/White Interior(needs some work)
Reply
#10
glad to hear a good report.
1990 LINCOLN MARK VII





LINCOHOLICS 4 LIFE



http://www.classicLincolns.com Classic Lincolns

http://www.fordforum.com Ford Forum

http://www.fordforums.com Ford Forums

http://www.gmvsford.com GM vs Ford

http://www.lincolnforums.com Lincoln Forums

http://www.lincolnsonline.com LincolnsOnLine

http://www.lincolnvscadillac.com Lincoln vs Cadillac

http://www.LSCridersPlus.com LSC Riders PLUS!

http://www.superford.org SuperFord.Org

http://www.westcoastlincolns.net West Coast Lincolns
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