About Jim Holsbeck Expertise I can answer most questions on Chevrolet vehicles up to 1996, or before the ODBII.
Experience I have been working on cars since I was eight, when I started handing my dad wrenches. I did my first complete rebuild at 14, and my first restoration at 16. When it comes to Chevy, if I don't know the answer off the top of my head, I can find it out fairly quickly. (My entire family is a bunch of gear heads.)
Education/Credentials 4 year machinist degree, with a 2 year mechanical drafting.
Expert: Jim Holsbeck Date: 9/17/2007 Subject: 99 Z28 Camaro Vibration
Question My camaro seems to vibrate when i reach about 50mph, and seems to run a little hard at 50mph and up. I drive the freeway a lot to work so i average 70mph-90mph and thats when i feel the vibration most. Wheels are balanced, fluids full, no leaks. Any guesses?
Answer Rob,
I would start with the driveline. Physically inspect it to see if there is any obvious dents or if it's a little out. You can do this by lifting the rear wheels and putting a straight edge on it and rotating it to see if it's bent. When they are built, they are balanced, so check to see if there is any spot on the driveline where it looks like a small square weight was welded to it and has fallen off. Grab the driveline and try to shake it side to side and up and down to check if there is any movement that would indicate a u-joint going out. While you are shaking the driveline look at the pinion yolk and see if there is any movement or seepage around the seal that would indicate a bad bearing. Also at this time check the tailshaft on the tranny to see if there is any movement there. I would be willing to bet upon close inspection of the driveshaft and surrounding components you find your vibration. If there isn't anything wrong there, let me know and I'll dig into it a little more. Good Luck!
