Vibrations and Noise
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From: Shawnee
Vibrations and Noise I have a 94 Camaro z28 with automatic tranny. When I drive the car above 50mph I start to hear noise that from the best I can tell sounds like it is coming from the transmission area and the car vibrates. The faster I go the worse it gets. At 90 it feels like the car is fixing to fly apart.
Now, when the car is setting still it runs great with no vibrations, when I put it in neutral going down the road it goes away, when I put it neutral going down the road then rev it up it still has no vibrations, then drop it back down into drive and they are back.
Guy I bought it from told me the transmission was just rebuilt with heavy duty parts and a 2500 stall converter ($2500). It has a very aggressive shift kit and 373 gears if that matters.
Any ideas on what is causing this?
Now, when the car is setting still it runs great with no vibrations, when I put it in neutral going down the road it goes away, when I put it neutral going down the road then rev it up it still has no vibrations, then drop it back down into drive and they are back.
Guy I bought it from told me the transmission was just rebuilt with heavy duty parts and a 2500 stall converter ($2500). It has a very aggressive shift kit and 373 gears if that matters.
Any ideas on what is causing this?
Last edited by okkarner; Sep 1, 2011 at 02:32 PM. Reason: new info
It would appear you've isolated the problem to the transmission. Since it has allegedly been recently rebuilt it's highly suspect something isn't right.
Any receipt for the rebuild?
Any receipt for the rebuild?
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1) If it sounds anything like a block of wood being shaken around in a tupperware bowl, suspect transmission mount.
2) Out of balance driveshaft is unlikely considering it only does it in gear. Might want to check just to be safe.
3) Drive shaft u-joints that are worn can become misaligned when load is applied (when it is in gear). Consider replacing u-joints.
4)A pinion gear with too much play can cause some vibration/noise under load (when it is in gear). Considering the rear end had a gear upgrade, it might not have been performed correctly and the crush sleeve might have been overcrushed.
That is a good start. The mount being the easiest thing, and cheapest. I suspect your problem really is there. Mine was.
2) Out of balance driveshaft is unlikely considering it only does it in gear. Might want to check just to be safe.
3) Drive shaft u-joints that are worn can become misaligned when load is applied (when it is in gear). Consider replacing u-joints.
4)A pinion gear with too much play can cause some vibration/noise under load (when it is in gear). Considering the rear end had a gear upgrade, it might not have been performed correctly and the crush sleeve might have been overcrushed.
That is a good start. The mount being the easiest thing, and cheapest. I suspect your problem really is there. Mine was.
