Ge Front loader spin problem

This front load spins out fine when there is no load. When it is under a load t makes noise and barely spins. I looked at suspension and all appears to be fine, and do not see any thing else that appears broken. Any help would be appreciated as to what to look into on this machine. Thanks!

Check the belt?

http://www.appliancepartspros.com/tub-motor-parts-for-ge-wcvh6800j0ms.html

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Tub & Motor parts for GE WCVH6800J0MS - AppliancePartsPros.com

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Thanks for the help. :slight_smile: