I work in a Driveline Shop in PA. www.GreensburgMachine.com, We set up about 300 Car and Truck Differentials a Year,
We use some Motive Gears, But when we do its always the Motive Performance, They do a another laping process to Make them Quiter over the regular Motive. We have ok luck with them in a 8 3/4s. But in some other types of rears they can be noisey, The 9 1/4 is one, Strength wise, They are Not too bad.. I Do prefer, OEM Gears 1st, Then US Gear or Strange over the Motive Performance, depending on Ratio and availability.. Bottom Line.. If You Go with the Motive Performace and they are set up right. You will be just fine