That means if the outside wheel is turning 2 rpm faster than the ring gear, the inside wheel is turning 2 rpm slower than the ring gear. The net sum of the speed of the two wheels is twice as fast as the ring gear. This is accomplished by spider gears that allow the outside wheel to turn faster (this can be either the left or the right, but must be the outside wheel) than the ring gear, while the inside wheel turns slower than the ring gear. Whenever a vehicle negotiates a turn, the outside wheel must travel farther (turn faster) than the inside wheel. When it comes to deciding which differential to use, there are now almost too many limited slip and locking differentials to choose from and it takes a knowledgeable sales person to help the customer choose a design that will serve their needs. If someone tells you that the housing you have will not accept the ratio you want, they are probably wrong, but that is a whole different story. In these cases, the differential carrier case must match the gear ratio and ring gear thickness. When changing differential carriers that support the ring gear, there are many rearend designs that use more than one height carrier case. The main point is that the differential carrier unit design is independent of the housing it is being installed into (we are limiting this info to American rear wheel drive passenger cars, American trucks up to 1-1/2 ton, and Toyota Trucks). And of course, a spool can be installed in place of all of them. Limited slips and lockers can be interchanged. Likewise, a locker or limited slip can be replaced with a standard open carrier. Standard Carriers, Positraction & Limited Slips, Locking Differentials, Spools and Mini-SpoolsĪs an opening note, for all situations except factory OEM electric lockers, a standard open carrier can be replaced with a limited slip or locker.

Dana 35 spartan locker drag