Pontiac Firebird 1967-2002 Birds of a feather flock together

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Old Jul 12, 2017 | 03:12 PM
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Stephen Dean's Avatar
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Default ello mate

First post, after years of literal lurking. I appreciate the knowledge and have humored myself a bit with some of the stuff that happens here.


A bit about my ride:
95 TransAm, A4.


Here is the issue: The stupid vibration.
Let me try and describe the sound: from soft to loud- vroooOOM....vroooOOM.....vrooOOM, only at 65 mph + and the frequency or hertz increase with speed (not exponentially, but linear). No shaking, just a vibration felt in the shifter and steering wheel with the associated and loosely described sound.
There is a TON of people complaining, but not a lot of people return to detail the way they fixed it or if they did at all.


Here is what I have done: New Aluminum DS. New U Joints. New motor mounts. (Waiting on the Tmounts). 4 new tires on 4 new rims.
There is a little rotational slack in the rear end, maybe 10*/15* movement. Free movement then sudden *CLANK* stop, all by hand. Not too much worried as I am dropping it off at the shop to have new 3.73s installed after a rebuild.


Any thoughts?
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Old Jul 12, 2017 | 04:43 PM
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Does the Harmonic balancer have to removed from the hub when pulling it off or can the hub and balancer be pulled as one?
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Old Jul 12, 2017 | 05:03 PM
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Originally Posted by Stephen Dean
Does the Harmonic balancer have to removed from the hub when pulling it off or can the hub and balancer be pulled as one?
Welcome.

Typically the entire balancer comes off once bolt is removed.

As far as the vibration goes, I'm getting something similar on my 68 Firebird. I haven't ruled out a bent axle...
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Old Jul 14, 2017 | 09:42 AM
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does it eventually go away? or does it continue ? once it starts is there any thing that makes it stop? an example my GTO had a odd vibration that would start at 55 but went away above 75. If I gave it a bit more throttle it would clear up or if I put it in neutral it went away.

Do you have the factory wheels.

part of my issue was switching wheels to a non hubcentric designe so I needed some hub rings to center the wheel on the hub. and Just for ***** and giggles have you checked you driveshaft angles?
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