Posted By: r3dplanet
whine unless clutch pushed in - 08/01/13 02:50 AM
Hi there.
I have a '65 Barracuda with a newly built 360 and an A833-OD gearbox. The car has been complete for more than a year but I've been slowly chasing a few gremlins and sounds resulting from changing so much equipment. Last year I replaced the radiator, engine, carburetor, intake, power steering (pump, gear, and hydrobooster), aluminum bellhousing, gearbox, driveline, front disc brake conversion, 8-3/4" rear diff, and exhaust. I'm still stuck with the 273 manifolds but that's a discussion for another time.
I have a clear problem where I hear an distinct engine whine that's hard to echo-locate, but it seems to come from the rear of the engine about where it meets the firewall. The pitch of the whine corresponds to the rpms - so at 3,000 rpms the whine is the same note. When the car starts in gear from a dead stop and the revs build up, I hear a corresponding whine. The same happens in second, third, and fourth. That is, as the speed of the engine increases so does the pitch of the whine. I can even hear it in neutral a little. BUT when I push in the clutch ( a new Centerforce 10.5" clutch ) the whine disappears. It also disappears when I push in the clutch to change gears.
What can this be? The shop who rebuilt my gearbox absolutely maintains that it isn't the transmission. So I'm wondering what it might be now - throwout bearing? Input shaft? Crank bushing? Z-bar? Clutch fork? I've been trying to figure this out for a while but I'm out of ideas.
Thanks for any insight,
Marcus
I have a '65 Barracuda with a newly built 360 and an A833-OD gearbox. The car has been complete for more than a year but I've been slowly chasing a few gremlins and sounds resulting from changing so much equipment. Last year I replaced the radiator, engine, carburetor, intake, power steering (pump, gear, and hydrobooster), aluminum bellhousing, gearbox, driveline, front disc brake conversion, 8-3/4" rear diff, and exhaust. I'm still stuck with the 273 manifolds but that's a discussion for another time.
I have a clear problem where I hear an distinct engine whine that's hard to echo-locate, but it seems to come from the rear of the engine about where it meets the firewall. The pitch of the whine corresponds to the rpms - so at 3,000 rpms the whine is the same note. When the car starts in gear from a dead stop and the revs build up, I hear a corresponding whine. The same happens in second, third, and fourth. That is, as the speed of the engine increases so does the pitch of the whine. I can even hear it in neutral a little. BUT when I push in the clutch ( a new Centerforce 10.5" clutch ) the whine disappears. It also disappears when I push in the clutch to change gears.
What can this be? The shop who rebuilt my gearbox absolutely maintains that it isn't the transmission. So I'm wondering what it might be now - throwout bearing? Input shaft? Crank bushing? Z-bar? Clutch fork? I've been trying to figure this out for a while but I'm out of ideas.
Thanks for any insight,
Marcus
or a miss adjusted clutch..
