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Uncorrectable Front End Vibration
Posted 28 January 2005 - 07:33 PM
After 3 alignments and re-balances I still have the same driveline vibration under accelleration and deceleration on hills, then also during straight-a-ways between 53-64 MPH. It comes and goes. I am convinced it is due to axle or rotor out of balance.
During the 3rd re-balance at Dobbs I replaced the 13" rally alloys with Toyo 185/75/R13's and put on the Pugeot 15" snowflake's with Cobra GT 195/60/R15's. (BTW Ed, these are the rims I have been draggin' around for 4 years just waiting to put on!). So we know all rims and rubber are perfect. Which leaves only axle, rotor, or dragging brake. I rulled out motor mounts and clutch by hitting neutral at 60 and still had the vibrations.
There is no lift.
The axles are relatively new, Advanced auto re-mans. I am tempted to buy a set from the guy at CCR, but it might be cheaper to just have them done here at a Sub dealer $$$$$$. :-(
Rotor are moded to vented disks and the calipers are both new rebuilts. all the hardware is under 1 year old.
Any thoughts on the matter? By driving on the vibration for a while I have begun to ruin the inner right DOJ, you can here it begining to pop. (or is it the begining of the pop that is causing the vibrations...)
If a tree falls in the forest... anyway..
I have already sunk 400.00 into parts and labor yet still have the issue. although it isn't as bad as it was now, that the steering is not sloppy.
I welcome any suggestions!
Posted 28 January 2005 - 07:56 PM
Posted 28 January 2005 - 10:12 PM
rear diff - maybe, but don't even think about that until you inspect those ujoints like nobody's business. the driveshaft on most soobs comes off REALLY easy so pull it and check if this vibration is really eating you up. the bad ujoint will feel lumpy as you move it and if it's bad enough it will be seized or have obvious signs of failure and breakage on it.
Posted 28 January 2005 - 10:14 PM
Posted 28 January 2005 - 11:03 PM
Posted 29 January 2005 - 04:02 AM
Posted 29 January 2005 - 07:11 AM
Posted 30 January 2005 - 01:34 AM
Posted 30 January 2005 - 01:47 PM
Posted 30 January 2005 - 03:47 PM
That will isolate the disturbance. If it dissapears ethen u joints are the way to go, if it doesn't tehn back to the front end.
Posted 30 January 2005 - 03:54 PM
The driveline is one piece in the Brat. If you remove it and try to drive you will lose fluid out the rear. If the joints are failing you will notice one will be hard to rotate or will not rotate at all. To check for slop you should check them in the car by placing sideways pressure at the joint and looking for movement. Axles are harder to tell though.
Posted 30 January 2005 - 03:59 PM
I thought both the front and rear were individually sealed. Good thing I didn't try! :-)
The snow should be gone by tomorrow so I'll crawl up underneath there and look.
Posted 30 January 2005 - 04:14 PM
Posted 30 January 2005 - 05:29 PM
Posted 30 January 2005 - 06:25 PM
Take a big screwdiver and insert between the u-joint and rack it back and forth. If you have any movement at all the u-joint is bad.
I said screw it and went out anyway. The joints seem ok, no movement to speak of. Although when I pulled back and forth you can hear a metallic "rattle" inside the shaft. I know the shafts are hollow, but what else is inside that would make that sound?
Posted 30 January 2005 - 07:53 PM
I dont' know of any way it could...
You'd love these new pugs and rubber Shawn. I'll post pics soon after I finally wash the car! Mideast winter road scum...
Posted 30 January 2005 - 09:05 PM
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