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I have a 2000 GMC Sierra 2500 and Im going to buy a lock-right differential locker. How many splines do I need?

April 26, 2017buy Differential GMC going lock-right locker Sierra splines

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I have a 2000 GMC Sierra 2500 and Im going to buy a lock-right differential locker. How many splines do I need?

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I own a shop, build a lot of rear-ends, and can tell you this. They put two different spline axles in your vehicle, and you are just guessing unless you remove the inspection plate, and count them. Mark one with some whiteout, and count them as you turn a wheel. You will lose the oil in the rear-end when you remove the cover, but you can get a hand pump from the parts store that will make it easy to put it back in with. If it’s a posi-unit type you will need special oil to go back with that is for that type of differential. You could just strain the oil and reuse it. Use something like a pair of panty hose to strain it with if you get dirt in it. Put a coat of RTV around the cover when you put it back, so it don’t leak. Glad to help out, Good Luck!!!