Vehicle: 1976 gmc 1500 w/350 & 350 trans
I get this rattling noise only when I am in gear and moreso once the engine is warm. It only occurs when accelerating and the noise is much louder up a hill.
The noise smooths out some when I give it more gas pedal. The noise is still there but is much quieter when i floor it.
I have revved the engine in neutral and no noise. I put it in drive with the break on and just giving some gas produces the noise.
The thing is running pretty rich. I smell fuel. The truck even diesels when I shut it off. If its a noise from detonation, wouldn't the rattling occur in and out of gear?
I don't see any cracks on the flex plate (or is it the flywheel that the starter contacts on start?
Could something just be loose?
Thanks!
I get this rattling noise only when I am in gear and moreso once the engine is warm. It only occurs when accelerating and the noise is much louder up a hill.
The noise smooths out some when I give it more gas pedal. The noise is still there but is much quieter when i floor it.
I have revved the engine in neutral and no noise. I put it in drive with the break on and just giving some gas produces the noise.
The thing is running pretty rich. I smell fuel. The truck even diesels when I shut it off. If its a noise from detonation, wouldn't the rattling occur in and out of gear?
I don't see any cracks on the flex plate (or is it the flywheel that the starter contacts on start?
Could something just be loose?
Thanks!