HotRodV6
11-21-2015, 10:45 PM
Ok, i recently bought a 97 Firebird Formula with 66K original miles. Car has sat for the last two years or so due to a bad fuel pump and then slashed tires.
The car is an auto with stock converter, rear axle has been rebuilt and has an aluminum rear cover and i was it has 3.73 gears but after driving it, its got 4.10 gears not sure if the locker is stock or aftermarket at this point. The rear suspension has granatelli motorsports lower arms, Hotchkis panhard bar, welded in subframe connectors, eibach pro kit springs and bilstein shocks. I think the sway bars are stock with urethane bushings, urethane trans mount and maybe engine mounts.
The engine has the LT4 hot cam kit with crane 1.6 roller rockers, BBK shorty headers and stock dual cat y-pipe and a flowmaster catback with a cutout. and a moroso CAI, EGR deleted as well. Rest is stock as best i can tell.
The car has 17x9.5 ZR1 style wheels and i just put a good used set of Cooper Zeon 275/40 tires, The vibration isn't there when cruising, but as soon as you give it gas to accelerate it shows up and seems to be related to speed.
I'm thinking maybe its u-joints but with only 66k miles on the car i wouldn't think they'd be worn out, but who knows. Also i don't think its anything in the rear axle as usually that would be noise under cruise or when you let off the gas.
Just looking for some advice as to were to look or if anybody has ran into this problem before.
Thanks for the help.
The car is an auto with stock converter, rear axle has been rebuilt and has an aluminum rear cover and i was it has 3.73 gears but after driving it, its got 4.10 gears not sure if the locker is stock or aftermarket at this point. The rear suspension has granatelli motorsports lower arms, Hotchkis panhard bar, welded in subframe connectors, eibach pro kit springs and bilstein shocks. I think the sway bars are stock with urethane bushings, urethane trans mount and maybe engine mounts.
The engine has the LT4 hot cam kit with crane 1.6 roller rockers, BBK shorty headers and stock dual cat y-pipe and a flowmaster catback with a cutout. and a moroso CAI, EGR deleted as well. Rest is stock as best i can tell.
The car has 17x9.5 ZR1 style wheels and i just put a good used set of Cooper Zeon 275/40 tires, The vibration isn't there when cruising, but as soon as you give it gas to accelerate it shows up and seems to be related to speed.
I'm thinking maybe its u-joints but with only 66k miles on the car i wouldn't think they'd be worn out, but who knows. Also i don't think its anything in the rear axle as usually that would be noise under cruise or when you let off the gas.
Just looking for some advice as to were to look or if anybody has ran into this problem before.
Thanks for the help.