1997 GMC Yukon Ring and Pinion Set 4WD - GM 8.25 in. Front - IFS - Reverse Rotation - Ring and Pinion Set - 3.73 Ratio - Fits 3.42 and Up Carrier Case - Front guaranteed to replace your current 1997 GMC Yukon Ring and Pinion Set 4WD - GM 8.25 in. Front - IFS - Reverse Rotation - Ring and Pinion Set - 3.73 Ratio - Fits 3.42 and Up Carrier Case - Front. 1997 GMC Yukon Ring and Pinion Set comes new OEM 1997 GMC Yukon Ring and Pinion Set aftermarket new 1997 GMC Yukon Ring and Pinion Set of remanufactured 1997 GMC Yukon Ring and Pinion Set 4WD - GM 8.25 in. Front - IFS - Reverse Rotation - Ring and Pinion Set - 3.73 Ratio - Fits 3.42 and Up Carrier Case - Front.