The spindle nut kit is designed for use with manual hubs and will make replacement easier. Can be used with 30 spline axles. Compatible with the following vehicles: 76-87 Chevrolet/GM 1-Ton Pickup; 88-90 V-Series 1-Ton Pickup; 78-97 Ford 3/4 and 1-Ton Heavy Duty Pickup. To replace automatic 3 hole cap screw hubs, you'll need the corresponding spindle nut kit.