63 Left Rear Thumping While Coasting
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8th Gear
Joined: Jun 2010
Posts: 8
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63 Left Rear Thumping While Coasting
I restored my 63 roadster about 9 years ago. several years ago it developed a "thumping" noise in the left rear, only while coasting (both in neutral and in gear), the increased and decreased in direct corilation to vehicle speed. Noise disappears under slight to heavy acceleration. Drained diff oil (it was crystal clear) and refilled with new oil and clutch additive. Did figure eights, still there. Went to different Corvette shop (well recommended by local NCRS chapter, and they said it was RIGHT not left rear bearing. Replaced that, still there. They also said the rotors (I converted to disc brakes during restoration) were warped, cut them, noise still there. Any ideas?
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Joined: Feb 2009
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I restored my 63 roadster about 9 years ago. several years ago it developed a "thumping" noise in the left rear, only while coasting (both in neutral and in gear), the increased and decreased in direct corilation to vehicle speed. Noise disappears under slight to heavy acceleration. Drained diff oil (it was crystal clear) and refilled with new oil and clutch additive. Did figure eights, still there. Went to different Corvette shop (well recommended by local NCRS chapter, and they said it was RIGHT not left rear bearing. Replaced that, still there. They also said the rotors (I converted to disc brakes during restoration) were warped, cut them, noise still there. Any ideas?
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