High RPM vibration on LT4
#1
High RPM vibration on LT4
When I get around 5K RPM at full throttle, I'm getting a bit of a vibration in the drivetrain. My first thought is the flywheel. It's not teeth chattering, but it's quite noticeable. Any thoughts on this would be greatly appreciated.
#3
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Me too. It is like a low rumble when I really get on it. I changed the rear hubs thinking it was the bearings, and also the half shaft u-joints. No change. I should have changed the drive shaft u-joints while I was in there? By any chance is your car a convertible? Please let me know if you figure it out. Sounds like the same problem to me.
#4
Me too. It is like a low rumble when I really get on it. I changed the rear hubs thinking it was the bearings, and also the half shaft u-joints. No change. I should have changed the drive shaft u-joints while I was in there? By any chance is your car a convertible? Please let me know if you figure it out. Sounds like the same problem to me.
#5
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St. Jude Donor '05
Clutch been changed recently?
Do those use the dampner on the driveshaft like some of the earlier C4s? Its up close to the trans. I think they are bonded on and can come loose, had that issue on my 89
Do those use the dampner on the driveshaft like some of the earlier C4s? Its up close to the trans. I think they are bonded on and can come loose, had that issue on my 89
#6
I think its normal, im running a richmont 6 spd and these cars have no rubber trans mount just hard bolted to the rear end, it drove me crazy for a long time, you just pick up more vibration with the setup
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No mine is not normal either. This is my 2nd 92 6spd and the other didn't do this. I have figured out that it has nothing to do with the car moving. It is just high RPMs. It happens in the driveway when the engine is reved up. Make sure you try this before spending any cash on u-joints and such like I did. I'm thinking motor mounts maybe? Any ideas?
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OK. Looks like mine starts at around 3500 to 4000. Does not smooth out above 4000, and does not change or get better with the clutch depressed. So must be in the engine, right?
#17
Drifting
#19
Burning Brakes
http://forums.corvetteforum.com/c4-t...ight=vibration
Read this for 6 speed cars
Read this for 6 speed cars
#20
Racer
Don't know how many miles on your engine or it's condition, But I had a bad vibration at high RPM and it was the main bearings. It didn't knock or anything but I felt the vibration in the whole car.
Last edited by IBVETN2; 04-06-2011 at 11:03 AM. Reason: spelling