Gigglepin Top Housing Bearing Kit G21039 for Warn 8274The Gigglepin Top Housing Bearing Kit (G21039) is an upgrade for the standard Warn 8274 8074 top housings and replaces the old Gigglepin Top Housing Bush Kit (G90001). The main gear in the standard Warn 8274 top housing is supported on its shaft by two needle roller bearings. These bearings have no spacers and can walk up inside the gear which can cause catastrophic damage not only to the main gear, but also the intermediate 7548 gear in the lower