I finally got all the stuff to build an 489 rear. I noticed on the factory pinion that there is a spacer/shim between the gear and big bearing. Do I need to transfer this over to the new gears? I went with a solid bushing and shims to replace the crush sleeves. I read somewhere that I install the pinion gear without shims and then measure from the saddle halve and subtract the number written on the pinion head to get what I need for shim thickness? I also wondered is it better to press the big bearing on? Is there any tricks to make this go simpler? Does anyone know a where a step by step is? I have looked around alot and cant seem to find any. Thanks
