sounds like i may have a knocking noise in bellhousing of my transmission

2004 GMC ENVOY
150,000 MILES
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BOBTIE
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sounds like i may have a knocking noise in bellhousing of my transmission
Mar 21, 2012 at 12:20 AM
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RASMATAZ
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What type of knocking noises are hearing? Is it thumping, thudding or rattling type?
Mar 21, 2012 at 12:43 AM
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BOBTIE
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thumping
Mar 21, 2012 at 1:05 AM
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RASMATAZ
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If its coming from the lower part of the engine on the back sounds like engine bearings-have it further diagnosed
Mar 21, 2012 at 5:37 AM