Tobias Thonet Posted February 3, 2015 Share Posted February 3, 2015 Hey guys, I'm thinking about buying a Olds 12 bolt. Nothing special but I need to replace the seals and bearings (peace of mind). But as I look on Summit at a Richmond repair kit I'm not sure what to look for. I'm going to buy a Richmond 3.55 ring and pinion and also an Eaton posi unit. Do I need to look at the spline count and such? Or am I really just making this more difficult than it should be? Quote Link to comment Share on other sites More sharing options...
bigscaht Posted February 5, 2015 Share Posted February 5, 2015 are you goin to replace the axles also? if so then what ever posi carrier you choose will have to match the spline count of the axles..if your not gonna replace ya axles then youi have to find out your axle spline count so u can get the correct posi carrier...i belive stock gm axles are 28 spline but double check..but honestly i would get new axles cuz depending on your powere output..those old axles are now the weak point back there..u dont wanna break something and have to go back in there to fix it... Quote Link to comment Share on other sites More sharing options...
Sam (Bones) Posted February 6, 2015 Share Posted February 6, 2015 if it's a BOP axle, it is different than a Chevy 12 bolt Quote Link to comment Share on other sites More sharing options...
bigscaht Posted February 6, 2015 Share Posted February 6, 2015 the axles should be the same length and both are c clips so I dont think the actual axles are different but the rear end center sections parts arent interchangeable Quote Link to comment Share on other sites More sharing options...
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