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These are the pinion or "spider" gears. They can be rotated out of thecase after removing the Posi-traction apply plates and springs. ThePosi-traction clutch plates are beneath the larger side gears. Thepinion shaft is pushed out so the plates and pinion gears could beremoved, then pushed back in for photos. You can see the shiny wear bandon the end of the pinion shaft. In most situations, the pinion shaftshould be replaced. As it wears and the case is damaged, the pinionshaft is loose and will break the pinion-shaft retainer bolt.