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| djxib | Diagnosing a vibration issue | ||
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Senior Guru
 
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So.. I recently noticed a strange behavior from the rear of the car when I 'get on it'. It's a kind of vibration, and almost feels as if the left rear tire is scrabbling for grip.
When it happens the rev limiter is pegged at 6000, so my theory is that I have some kind of wheelspin. However the ASR doesnt kick in (ASR seems to work fine if I'm aggressive on corners...). Despite the problem the car accelerates well so I dont think I have a slipping clutch. The only thing I can think of is that the rear tires are old now (replaced in spring 2002) and the rubber has gone hard - the tires only have 20k miles on them. I am going to replace the tires and have a full wheel balance etc.. just wanted to see if you have any alternative theories. Thanks Gurus! |
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Posted on: 2009/1/12 17:16
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| 1Fast04Vert | Re: Diagnosing a vibration issue | ||
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Elite Guru
 
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First is easiest, check tire pressures. Jack it up and check the usual stuff, hub bearings, etc for play. You are running the 315/35s? Which brand are you thinking about going back with?
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Posted on: 2009/1/12 19:17
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2004 Vert. 475hp. Built by Vengeance Racing |
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| djxib | Re: Diagnosing a vibration issue | ||
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Senior Guru
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Yep - good suggestions, plan to check all that this weekend. I will probably go with Nitto 555's in the 315/35.. simply because I have them on the front and I have heard good things about them (not to start a tire thread :-)
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Posted on: 2009/1/12 19:37
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| 1Fast04Vert | Re: Diagnosing a vibration issue | ||
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Elite Guru
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I just got my Nitto 555Rs mounted and balnced today. They are 315/35/17s on black ZR1 wheels. Now I just have to wait for springtime so I can actually put them on the Vette and take it back to the track. Hurry up spring time!!!
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Posted on: 2009/1/12 22:53
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2004 Vert. 475hp. Built by Vengeance Racing |
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| Schrade | Re: Diagnosing a vibration issue | ||
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Elite Guru
 
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Could be the stick-on lead has come off. This happened to me pretty quick after I got new rims and rubber.
I got the lead replaced, and put on black duct tape on top of the weights. |
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Posted on: 2009/1/12 23:13
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LT5, Marc Haibeck ECM module, AUTOMATIC!!! 
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| pianoguy | Re: Diagnosing a vibration issue | ||
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Guru Emeritus
 
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Quote:
That's happened to me, too. Also, check to make sure you haven't run over a mattress lately ;-) http://jalopnik.com/5106002/jeep-runs ... ds-attached-to-drivetrain |
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Posted on: 2009/1/12 23:49
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1996 LT4 �Before you criticize someone, you should walk a mile in their shoes. That way when you criticize them, you are a mile away from them and you have their shoes.�- Jack Handey |
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| BrianCunningham | Re: Diagnosing a vibration issue | ||
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Senior Guru
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With the early ASR you can slip the tires w/o setting it off.
I do that up at Loudon exiting turn 10. Then again it kicks off like crazy during low speed events if I turn it off. |
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Posted on: 2009/1/13 0:01
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Polo Green 95 LT1 6-spd http://mysite.verizon.net/vzevcp74/ 383 LT1/Vortech Supercharger/AFR heads/Rod end suspension/Penske-Hardbar dual rate coilovers/Wilwood 6pot brakes NCCC Governor: http://BayStateCorvetteClub.com |
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| BillH | Re: Diagnosing a vibration issue | ||
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The Stig Moderator
 
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Quote:
The first thing I do after starting my car, even before putting on the seatbelt, is turn the ASR off. |
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Posted on: 2009/1/13 14:31
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Every man dies but not every man lives. |
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| djxib | Re: Diagnosing a vibration issue | ||
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Senior Guru
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That's it! I'll go and check :-) |
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Posted on: 2009/1/13 18:55
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