High pitch Whirring sound, new engine. - Pontiac GTO Forum
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post #1 of 4 (permalink) Old 06-03-2012, 04:39 PM Thread Starter
 
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High pitch Whirring sound, new engine.

Started developing a whirring sound recently and its getting pretty loud. I thought it was the power steering pump or alternator but I disconnected both of them and no luck. Stethoscope sounds like it could be the transmission but here is a video. Any ideas?

http://static.photobucket.com/player...603_161911.mp4
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post #2 of 4 (permalink) Old 06-03-2012, 05:21 PM
 
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SLide underneath and unbolt the convertor and slide it back. Restart and recheck

https://www.gtoforum.com/signaturepics/sigpic18842_1.gif

1966 Pontiac Lemans Convertible
389 tri power
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post #3 of 4 (permalink) Old 06-04-2012, 11:29 AM Thread Starter
 
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Disconnected the torque converter and the sound appears to be gone... maybe a bearing in the tranny is getting ready to go or something. That sucks but it's better than the engine... as long as its not something in the engine that removing the drag of the transmission quieted. Guess ill have to yank the tranny and rebuild it... any input?
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post #4 of 4 (permalink) Old 06-04-2012, 04:57 PM Thread Starter
 
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Been reading about th400's online. Looks like my pump might be to blame. Fluid deprived or just time for a rebuild.
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO Complete Engine Compartment Discussion

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