Vibrations come back after installed UCA/LCA

Slow5.0

Active Member

Feb 13, 2003

2,554

0

46

Portland, OR

Mar 28, 2004

#1

• Mar 28, 2004

• #1

Two night ago I installed UCA/LCA and after I start car and rev up little bit I fing vibrations 4500rpms and up and same thing when I driving car in any gear harder 4500rpms and up , A two months ago I installed balancer from 50resto http://secure.50resto.com/product1.cfm?SID=1&Product_ID=1733&Category_ID=571 because I had vibrations 5K and up , after I installed that balancer vibrations are gone , but now it's back , I check balancer this morning and looks good , so there have too be something else , meybe exhause touching something
What you guys think

 

urban96

bubb rubb says:"woo woooooo"

Founding Member

Sep 24, 2002

3,464

1

69

Syracuse, NY

Mar 28, 2004

#2

• Mar 28, 2004

• #2

http://forums.stangnet.com/showthread.php?t=423856

*edit- i read the rest of the thread and seen you posted there already.

 

Y

yellow1995Cobra

New Member

Dec 23, 2002

2,959

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0

Massachusetts

Mar 28, 2004

#3

• Mar 28, 2004

• #3

you will get some vibrations from the UCA's and LCA's cause they use poly bushings. Should only be when your driving though.

 

5.0 from 95

Founding Member

Nov 6, 2001

738

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0

Emory, TX

Mar 28, 2004

#4

• Mar 28, 2004

• #4

Did you do anything with the drive shaft. If you did, you might not have put it back in the same spot as last time.


Paul

 

Slow5.0

Active Member

Feb 13, 2003

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46

Portland, OR

Mar 29, 2004

#5

• Mar 29, 2004

• #5

Only thing with drive shaft I did I accidently put jack under rear U-joint for like a few sec but with light pressure BUT drive shaft isn't problem , problem coming between clutch (on one side) and harmonic balancer (on othet side) balancer is a few months old and I checked him this morning ,still looks good like when I installed
I find today , vibrations are all the time , it's like 70% of driving

 

Slow5.0

Active Member

Feb 13, 2003

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Portland, OR

Apr 1, 2004

#6

• Apr 1, 2004

• #6

I forget to tell you guys I rev up for like 20 sec with open headers (because I have to take mufflers off two bolts on front od LCA is pain in a$$ so I take h-pipe and see how sound with open headers , meybe that can cause some problems , I put exhaust like before, I still can't find whats wrong , AND this weekend I going on track test all this new mods and I wanna find what cause vibration before saturday

 

Slow5.0

Active Member

Feb 13, 2003

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46

Portland, OR

Apr 3, 2004

#7

• Apr 3, 2004

• #7

Last night I check whole rear end , evertthing is tight , I chech driveshaft with engine runing and trany in gears with rear wheels in air , driveshaft looks good BUT I thing something is wrong with drivetrain or so , because sometime I can't heard vibrationg in neutral , biggest vibrations come when is load or when I driving hard thru any gear over 4500rpms , meybe new UCA/LCA change axle position and whole axle/diffetential are moved forward to tranny and now driveshaft can't play forward and back like before , AND I tryed put two more guys in car and take ride hard ride ,with them vibrations are worst
What you guys think

 

DougNuts

Founding Member

Jul 11, 2000

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47

Georgetown Ky

Apr 3, 2004

#8

• Apr 3, 2004

• #8

Seth, did you check the balancer with the engine running? Make sure it's not wobbling at all?

 

Slow5.0

Active Member

Feb 13, 2003

2,554

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46

Portland, OR

Apr 4, 2004

#9

• Apr 4, 2004

• #9

Yes I check out balancer like 10 times in last a few days ,
BTW I talk with my friend who is also good Mustang mechanic and who own 10s 94 Stang 347 with blower, he told me that he have same problem a few years ago and tranny mount was bad and he told me meybe driveshaft is bad (off balance) and that I need FRPP aluminum driveshaft
So I gonna change tranny mount and buy Aluminum driveshaft then we will see are those vibrations gone