bad shake at 69 mph
Thread Starter
Heel & Toe
Joined: Mar 2003
Posts: 20
Likes: 0
bad shake at 69 mph
i have a pretty good vibration about 68-70 mph. it fades about 71 but comes back around 90+. i hope its just a tire out of balance......any thoughts. just noticed it last weekend. '94 LT-1. yeah i now you all get tired of my stupid questions but i really appreciate all info.
thanks, from a first time vette owner
:cheers:
thanks, from a first time vette owner
:cheers:
Intermediate
Joined: Feb 2004
Posts: 35
Likes: 0
From: Rancho Cucamonga CA
Re: bad shake at 69 mph (wareagl305)
Good place to start. Tires out of balance is very common cause of that symptom. Every time I have my tires re-balanced the ride quality improves.
It is something that deteriorates slowly over time (tire balance) so you don't typically notice how bad it has gotten.
[Modified by D_C71, 2:39 AM 2/3/2004]
It is something that deteriorates slowly over time (tire balance) so you don't typically notice how bad it has gotten.
[Modified by D_C71, 2:39 AM 2/3/2004]
Advanced
Joined: Jan 2004
Posts: 92
Likes: 0
From: san diego ca
Re: bad shake at 69 mph (wareagl305)
yes :iagree:
have your tires balanced on a hunter gsp9700 machine
or one similar http://www.hunter.com/pub/company/findrep.htm
Its supposed to be the best balancer on the market today and from what i've heard so far on this forum.... nothing else will do.
have your tires balanced on a hunter gsp9700 machine
or one similar http://www.hunter.com/pub/company/findrep.htm
Its supposed to be the best balancer on the market today and from what i've heard so far on this forum.... nothing else will do.
Advanced
Joined: Jan 2004
Posts: 92
Likes: 0
From: san diego ca
Team Owner
Joined: Sep 2003
Posts: 20,179
Likes: 673
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
Re: bad shake at 69 mph (wareagl305)
U-joints! After re-balancing the tires three times it became apparent the tires were not at fault. I inspected and shook the heck out of the axles and could never detect any play. After pulling all three shafts, it was discovered that one of the halfshaft bearing cups was rotating in the yoke. (110K miles) And the xmsn output coupling was shaking as well. Final bill: $145 for all new Spicer U-joints. $250 for replacement parts and balance 3 shafts.
More info http://forums.corvetteforum.com/zerothread?id=711600
Say Hey to Awesome Bill!
:cheers: -JRC-
[Modified by JrRifleCoach, 6:44 PM 2/2/2004]
More info http://forums.corvetteforum.com/zerothread?id=711600
Say Hey to Awesome Bill!
:cheers: -JRC-
[Modified by JrRifleCoach, 6:44 PM 2/2/2004]
Thread Starter
Heel & Toe
Joined: Mar 2003
Posts: 20
Likes: 0
Re: bad shake at 69 mph (JrRifleCoach)
yeah its the U-joints. im gonna replace them saturday with the help of a friend and co-worker. he used to work at an off-road shop. he said it shouldnt be much of a problem. i have another friend who is gonna loan us his shop.......and more importantly....his car lift. any special instructions or hints we should know about? already have the HANES repair manual but i was just wondering if anyone has done this recently.
Race Director
Joined: May 2000
Posts: 17,101
Likes: 4
From: No more yankee my wankee, the Donger is tired!
Re: bad shake at 69 mph (wareagl305)
Go ahead and replace all the U-joints, they don't cost that much, especially if you are doing all the labor yourself.
Thread Starter
Heel & Toe
Joined: Mar 2003
Posts: 20
Likes: 0
Re: bad shake at 69 mph (Jeffvette)
yeah ive already purchased them. we're gonna replace all them on the drive shaft. the ones going to the rear wheels look as good as new. the off road specialist friend said to use the ones without grease. said they would be stronger and last just as long................true?
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Team Owner
Joined: Sep 2003
Posts: 20,179
Likes: 673
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
Re: bad shake at 69 mph (wareagl305)
Here are a coupla things to watch for and to help ya out.
1 If you use really long extensions to get to the little cap screws on the u-joints its a lot easier than busting knuckles against suspension components.
2 Inspect the old joints very carefully. Especially the cups that are pressed into the fixed yokes. One of mine was turning in the yoke bore and required the replacement of the yoke. You could see evidence of this from the bearing cup rubbing against the retaining clip. This is not good!
3 Check the tranny output shaft for play and condition of the spline shaft. Replace if the seal has cut a groove into the sealing surface.
4 And while you got it apart, check the rear wheel bearings for play.
Good Luck!
-JRC-
1 If you use really long extensions to get to the little cap screws on the u-joints its a lot easier than busting knuckles against suspension components.
2 Inspect the old joints very carefully. Especially the cups that are pressed into the fixed yokes. One of mine was turning in the yoke bore and required the replacement of the yoke. You could see evidence of this from the bearing cup rubbing against the retaining clip. This is not good!
3 Check the tranny output shaft for play and condition of the spline shaft. Replace if the seal has cut a groove into the sealing surface.
4 And while you got it apart, check the rear wheel bearings for play.
Good Luck!
-JRC-
Bench Racer
Joined: Feb 2003
Posts: 4,201
Likes: 15
From: Palm Beach Gardens FL
St. Jude '03 thru 14,'25
Re: bad shake at 69 mph (wareagl305)
yeah its the U-joints. im gonna replace them saturday with the help of a friend and co-worker. ....any special instructions or hints we should know about? already have the HANES repair manual but i was just wondering if anyone has done this recently.
http://personal.tmlp.com/scorp/vette...nts/index.html