vibrations at high speeds :(
08-26-2009, 02:25 PM
#1
2nd Gear Member
Thread Starter
Join Date: Apr 2007
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Posts: 368
vibrations at high speeds :(
Yet another problem, sometimes i dislike this sport, anyways I am having a problem with the car vibrating/shaking at speeds over 80mph, it seems like its coming from the front end but not 100% I checked my driveline and all the balancers are still on it and i replaced the harmonic balancer because it had wobble in it and the problem went away than came back real quick, when i go over 80mph its like a big vibration, there is no vibration in the steering wheel when this does happen and you can hear a funny noise like a GGRRRRRRR sound than right when i get under 80mph it goes away, I even tried going over 80mph than pushing the clutch in to let the motor rev down and the problem is still there but only goes away below 80mph, also I Stuck a pry bar underneath the tranny mount and i could fairly easily move the transmission up and down, and I am pretty sure the motor mounts are bad because when i rev it the engine it moves a lot, I also have wore out rear shocks if that could cause a problem, Thanks guys. My car is lowered with sportline springs if this matters
Last edited by kennebellgt; 08-26-2009 at 02:26 PM. Reason: My car is lowered with sportline springs (if this matters)
08-26-2009, 03:01 PM
#5
2nd Gear Member
Thread Starter
Join Date: Apr 2007
Location:
Posts: 368
i wonder how much more power i would have if i had gotten those.
08-26-2009, 08:29 PM
#7
I like the canfields they look as if they've got plenty of room for portwork and crap but I just wanna get my car running good before I go any bigger.
08-26-2009, 09:14 PM
#8
5th Gear Member
Join Date: Dec 2006
Location: louisiana
Posts: 2,763
08-26-2009, 09:24 PM
#9
5th Gear Member
Join Date: Dec 2006
Location: louisiana
Posts: 2,763
What rpm do you pull at 80mph +?
Its not front suspension or front tire balance if you do not feel it in the steering wheel.
Im concerned that when you changed the balancer that it did go away.
Try using a different road, road feel can play a part, but the noise/vibration you are describing does not sound like its the road.
Motor mounts could make a vibration worse, but if you push the clutch in and the vibration does not go away, that means its not just torque related. Its a driveline problem.
Flat spot in the tire(s): normally happen sooner than 80.
Find a shop that has a Road Force tire balancer, that will show a bad spot in the tire.
Pinion angle, you car is lowered, so this is a great possibility.
If it doesnt happen until 80, its not out very far.
stock or aftermarket driveshaft? good u joints?
Have the pinion angle checked and go from there.
Its not front suspension or front tire balance if you do not feel it in the steering wheel.
Im concerned that when you changed the balancer that it did go away.
Try using a different road, road feel can play a part, but the noise/vibration you are describing does not sound like its the road.
Motor mounts could make a vibration worse, but if you push the clutch in and the vibration does not go away, that means its not just torque related. Its a driveline problem.
Flat spot in the tire(s): normally happen sooner than 80.
Find a shop that has a Road Force tire balancer, that will show a bad spot in the tire.
Pinion angle, you car is lowered, so this is a great possibility.
If it doesnt happen until 80, its not out very far.
stock or aftermarket driveshaft? good u joints?
Have the pinion angle checked and go from there.
08-26-2009, 09:26 PM
#10
Join Date: Jul 2009
Location: California
Posts: 39