my first 742 case rebuild, need alittle advice please

mopar56 said

wow, all good info here thanks!, just to be clear after reading the last post...shim the pinion head first to .090, install the carrier then apply pre-load, with only the yoke and NO front shims, check back lash and pattern and ONLY after that is right, shim the yoke, that is good to know I was going to install all shims right away, so is there a good starting point for the forward shim?, also I have been reading some people buy a second pinion head bearing and sand the inner part down to use as a tool to set depth, is this a good idea? thanks

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yes start with the .090 shim -- add preload to the pinion bearings without the pinion preload shims for your initial set up and also if you have to make any shim changes --- once the proper pinion shim is found that gives you a-- proper gear pattern -- then move on to selecting the amount of shim to give you the proper bearing preload,,, on 742 cases this could be from .030 - .050 depending on the gear ,,, measure your preload with the pinion only in the case ---the carrier and gear must be out of the case----- you can use old pinion bearings if in good shape to do your set up,,, hone out the centers for a light slip fit over the gear and proceed with your set up --