My '98 Z-28 only has 38k miles on it, and it has started giving this weird vibration in 3rd gear. If I'm maintaining low rpm it's fine, but soon as I start to accelerate, I feel this weird vibration, like the driveshaft is WAY outta balance. But, it only does it in 3rd gear under a load, and if you free rev the car it doesn't do it at all? Do me a favor and tell me that it's nothing to worry about
I've got a D&D T-56 to go in at Christmas time, but I have to make it til then, and still make a trip back to Texas at Christmas time. I noticed tonight that the vibration was significantly worse than before, also..I don't know if it makes any difference, it was also alot colder than it has been lately.
TIA,
Jason