Hi guys!
If anyone recalls I had an issue that turned out to be tranny related a few weeks ago that people here helped resolve. I've got a new one that I've just noticed recently.
At low RPM's and speeds greater than 40mph I have an odd vibration. At low RPM's and around 40mph it's simply that, an unusual vibration throughout the car. But at higher speeds, like 60-70mph, the vibration changes. It becomes a rhythemic soft thump, very regular, almost like the feeling created by a badly missing sparkplug. The engine runs fine, new plugs and wires and no sound of missing from the engine. It's just this soft regular "Thump" feeling.
It only occurs at low RPM's, with a very slight amount of gas. Like if I'm on the highway in Overdrive, I'll feel it. But if I keep it in 3rd, where the RPM's are higher, I don't.
I'm wondering if it's driveshaft? I do have the stock driveshaft on the car, and it's pretty rusty.
1998 3.8L Firebird
Whisper Lid
NGK irridium plugs
Taylor Spiro Pro 8mm wires
Stock suspension, driveshaft, 3.02(non-performance package gears, they're 3.02 right?)
Any help is appriciated!
If anyone recalls I had an issue that turned out to be tranny related a few weeks ago that people here helped resolve. I've got a new one that I've just noticed recently.
At low RPM's and speeds greater than 40mph I have an odd vibration. At low RPM's and around 40mph it's simply that, an unusual vibration throughout the car. But at higher speeds, like 60-70mph, the vibration changes. It becomes a rhythemic soft thump, very regular, almost like the feeling created by a badly missing sparkplug. The engine runs fine, new plugs and wires and no sound of missing from the engine. It's just this soft regular "Thump" feeling.
It only occurs at low RPM's, with a very slight amount of gas. Like if I'm on the highway in Overdrive, I'll feel it. But if I keep it in 3rd, where the RPM's are higher, I don't.
I'm wondering if it's driveshaft? I do have the stock driveshaft on the car, and it's pretty rusty.
1998 3.8L Firebird
Whisper Lid
NGK irridium plugs
Taylor Spiro Pro 8mm wires
Stock suspension, driveshaft, 3.02(non-performance package gears, they're 3.02 right?)
Any help is appriciated!
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