Can I take a good open rear and make it a good posi by removing posi from an exact year axle with same disc 26 spline/3.23 gears rear that has teeth broke with out causing ring and pinion problems? What is exactly the easiest/cheapest way? Additinal info in previous post of posi swap I alraey have both rearends on ground side by side and want to do this before put back in car!!

 

Just remember that shims go with housings, not moving parts. All you have to do is put the shims that came out of the housing with the good gears, back into that housing, exactly where they came from. The whole setup and shimming thing is to adjust for variances between housings; the gears and carriers are all very close to the same. Also don't forget that the ring gear bolts are left-hand-thread. The factory shims are cast iron, and are easy to shatter if you beat on them, so be careful. Also, it is possible that they are chewed up on one side, since that always seems to happen to them; if so, just flip them over. Also, if the pinion gear is very easy to turn with the carrier out (like less than about 1 foot-pound) you might want to consider tightening up the pinion nut to get about 2 or 3 foot pounds of drag in its bearings.

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"So many Mustangs, so little time..."
ICON Motorsports

[This message has been edited by RB83L69 (edited June 16, 2001).]

 

You've been given some good advice so far.
Not much to add to it but you may experience slight gear whine if the backlash isn't exactly where it was running since it was new, but don't worry about it.
To tighten the pinion nut I usually get it all together and put a 12" long 1/2 extension in the crosspin hole to hold it from turning. Either that or a big pipe wrench on the rear yolk, just don't over tighten it. You probably need a 3' extension bar to move the pinion nut, it's tight.

 

Jay's right about the pinion nut, and has a couple of good techniques for turning it... I use a piece of strip stock like about 1/8" x 1½" x 2' with 2 holes drilled in it, bolted to the yoke with the U-joint bolts. The nut is 1¼" hex. It should take about 100-150 ft-lbs more or less to turn it.

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"So many Mustangs, so little time..."
ICON Motorsports