Guys I'm trying to order a new rear pinion seal for my 12 bolt in the 76 blazer. Just got off the phone with oriellys and they can have the pinion seal here tomorrow if I call back tonight before 10pm ET tonight. There are three different pinion seal options that they have, all for different size ring gears, the choices are 8.5 inch ring gear, 8.875 inch and 9.5 inch? Can anybody tell me what I have. Gears are stock and its a th350 np203 and Dana 44 and 12 bolt. Thanks guys. Any help appreciated as I'm trying to get an answer before 10.
