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Old 04-10-2012, 11:20 AM
Sweet-34's Avatar
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Weird noise...Engine/Trans

I've got a weird noise coming from my 350/350 in my '34. It's OK when cold but after 10 miles or so when you stop in drive you can hear a little rattle. Put it in reverse with your foot on the brake and it is allot louder.

I have been over the top and the bottom on a lift and cannot find anything loose.

It's not a squeak or a knock. It sounds like a rattle!!! Could it be a cracked flex plate? If so...what does it sound like if it is cracked?

All suggestions and advice will be greatly appreciated.

Thank you..........See ya on the boulevard!!!!!

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Old 04-10-2012, 01:11 PM
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you did check the torque converter bolts? If need be, lower the idle down low as it'll go while in gear, chock both in front and back of the wheels, and if it's got a emergency brake, set it. Then with it running and in gear with the following steps I mentioned, raise it back up on the lift and see if you can trace the rattle. You have also checked the headers? Years ago I had a set that had something come loose internally and they rattled when going down the road. You may also want to remove the belts, fire it up for a second and see if the rattle is still present.
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Old 04-10-2012, 01:21 PM
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Had it running in gear on the lift with the rattle. Checked over the complete bottom side and topside with a stethoscope. Could not locate the rattle.

Got Ram's Horn manifolds. Got another vehicle on the lift for a week or so but when I get a chance I'll check the torque converter bolts.

Put the stethoscope on the alternator and A/C compressor, distributor and water pump while running.........NOTHING!!!

Checked the starter bolts, bell housing bolts and everything that might come loose or cause a rattle.

Got me stumped right now but will continue until found.

Thanks for your input.........See ya on the boulevard!!!!
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Old 04-10-2012, 01:34 PM
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I removed a spark plug and the top proceline broke and dropped down out of sight. I could not find it anywhere. Then when I removed the long tube headers I found it dropped into the top of the collector, wedged between where all the pipes meet. No way I would have found it unless I removed the headers. Did you drop a socket at some point? Or some other various engine parts or bolts?
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Old 04-10-2012, 02:56 PM
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I vote for cracked flexplate.
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