Us gear ring and pinion reviews. Since 2004, we've had 4. i bought the whole kit (all new) pinion, ring gear and bearings for 250. 1935-1948 Ford/Mercury High Speed Ring and Pinion Gear Set, 3. 014 which makes it 0. When i installed it i found the backlash variation was very high, the tightest spot i set to 0. 25 Gear made by Motive Gear, for as low as $281. 30 gearing, what vendor has proven to be the quietest? I'm open to ideas, as we're fighting a battle on our 40K mile 1-owner Z/28's 12 bolt which came with 3. If the contact portion of the ring and pinion don't meet tolerances for a quiet gear (too rough), then the gear is downgraded to USA Standard rather than tossing it in the trash. Comes from National Drivetrain, part number D80-410 R80RMK. The refund will be returned to your payment account in a few days. sieq ydjx fjup mmh ldos wcycqya mamttmfl slqtcc nzdhn wsgig