[61K10]

yes they are harder than a 12B as the shims are under the bearing races. start with the same shims that were stock. I have new bearings that i have clearanced to slide off and on the pinion and carrier for set-up. the big problem is the shims under the pinion bearing races. google is your friend here lol! Let me know if you need anything i might have. you're welcome to the slip-fit bearings if you need them. I am not an expert by any means lol. Being retired with my income, i have to do it my-self (would anyway)

kimble