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I did mine this summer so it is still fresh in my mind.
I made a tool to spread the case. I just uploaded a picture of it here.
the guts will pull out pretty easily once the axle shafts are removed.
the tool is to spread the axle when re assembling.
The differential is designed to have about .006" extra shims according to the haines manual.
you get the backlash just right and once everything looks good add .003 to each side. This is supposed to provide some preload. you might get away without preloading it. I took mine all apart once and did it by just putting as much behind it as I could get.
if you take it out you can also flip the two spider gears over. the ones that line up with the ends of the axle shafts. you push the pin out and rotate the whole assy 180 degrees. this makes the drive side of these gears into the driven side. the drive side wears more. the gears push against the drive side when accellerating , and the driven side when decellerating. leave the other two alone. this won't make a huge diffeence, just a tiny bit.
I replaced all the bearings (obtained new timken bearings from a bearing retailer) and changed the crown and pinion. I had a new one that was lower geared. 4.56 rather than the 4.11 This was alot of work and you do need to take your time and be picky to get it right. the bearings on the outer end of the axles were a little more expensive than the others, because the inner races are tapered.
phil
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