Pinion Mounted Emergency Brake for Ford 9 Inch

The overall design of the unit is well thought out and will provide years of reliable service, but there are a few details you should consider when bolting this unit up to your 9"" Ford rear. 1. The replacement bolts that go into the pinion support housing should be 3/8 to 1/2 longer then what is provided. There is the chance, depending on the HP your vehicle is pushing, that the bolts not being threaded far enough into the housing could pull out. 2. Depending on your yoke style, since Ford had several throughout the years, the disc mounting surface may need to be machined down to keep the disc run out to a minimum. The first attempt had the run out at .045. After we had the surface machined flat, the run out was held to .004 which will hold the disc wobble down to nothing. Also the U-Joint mounting surface had to be machined to get the proper cap clearance. Again, these were just observations we took notice to and suggest you look for the same thing when you install this product. I still give it a 5 star rating based on design and funtion. It just needed to be tweeked a little. A great idea for running rear disc brake system and still have a good parking brake.