Question about Ford F-150

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I am still having vibration problems?

I am still having vibration problems with my 93 Ford F-150 4.9L and i have had new bearings put into the rear end. I have had new U joints press into the drive shaft and had the drive shaft checked out it self and that came out all good. I have had a new brass bushing put into the tail end of the Transmission and it still did not fix the problem but the Transmission guy to me told me to go and get some lube guard and put it into the Transmission. He told me to drive it for 50 miles and that should stop the vibration problem and he told me to get the lube guard at Midway Auto Parts in Greer. So would that really stop the vibration problem cause it is starting to look like know body can not find the vibration problem and all they are doing is trying to guess. I really need some real help with this problem or i am going to sale my truck and buy a Chevy.

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  • John Lister Feb 25, 2012

    My bad i mean i have put new cv joints on the drive shaft but my Transmission guy told to put some lube guard in the Transmission and the should stop the vibration. So would that help stop the vibration? I am asking for help here.

  • John Lister Feb 25, 2012

    I was told the vibration problem is in the drive train so would this help by put some lube guard in the Transmission?

  • John Lister Feb 25, 2012

    I do not know actually what is vibrating. But i was told it is coming from the drive train so would this help by putting some lube guard in the Transmission. Cause my Transmission guy told me to put that in it so will that help or not?

  • John Lister Feb 25, 2012

    Well i do not mean U joints or cv joints what i mean is the drive shaft joints are new cause i have had them put new. But like i have been saying my Transmission guy told me that it is coming from the drive train. He told me to put some lube guard in the Transmission and that may stop the vibration problem. So could that help?

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What is actually vibrating. have you checked the tyres to make sure any are not out of shape (oval) also wheel balancing. hope this helps you out, keep me informed of whats happening and i will repeat will sort it

Posted on Feb 25, 2012

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93 jeep yj 2.5 lift new u joints 31 s drive line vibration is this normal for such a small lift ?


Usually at some point in time

You have to check & correct drive shaft angles,
the best you can, with shims on the rear spring perches
& possibly lower the trans tail housing mount

You have to check the drive shaft for being straight
& MUST have it balanced

What about Shocks?

Did you add ones with the extra travel as the lift?

Did you try different tire pressures?

Have you narrowed down the exact speed & road
conditions it starts to vibrate?

Are the rear wheel bearings on their way out?

How about installing new motor & trans mounts?

Change all diff fluids & go to full-syn

Install or rotate the tires to different spots

Keep notes & make one change at a time

Is the Suspension Bound up any where & not free
to rotate or move since lifted?

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This sounds crazy but I had it happen once. Have your wheels balanced. On my truck, I had a slight bend in one of my wheels. I never felt it at low speed but as I approached highway speeds, it could feel a vibration. I had everything checked out and it ended up being a slightly bent wheel.
I hope that helps.
Semper Fi,
Z

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