Rear end issue

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cwalker509

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1971 Mustang Mach I
1972 Mexican GT-351
I rebuilt this 20 yrs ago and car has not been running since the rebuild (so it has been sitting in garage this entire time).  3.50 N case 31 spline trac-lock .  I am installing rear discs and noticed the rear axle has a VERY noticeable difficult to turn spot.  Engine is going to be at least a 460 (may be stroked) and needless to say the sticky turning is concerning.  I am already thinking i will pull rear end (need to weld a bit for disc install).  My plan is to remove the brakes and pull the axle(s) to see if a wheel bearing is the problem.  If not then remove the pumpkin and go from there.  Has anyone seen this before?  Any recommendations for troubleshooting/diagnosing the root cause?  I probably should pull pumpkin anyways since it did not seal very well so really after ideas of things to look for.

 

Don C

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My first guess is rust on the ring (and possibly pinion) gear, unless you periodically rotated the rear end to redistribute the lubricant.

 

c9zx

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What Don said. Chuck

 

cwalker509

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I did not maintain this like I should. I guess I should tear it down and replace as needed?

 

Bentworker

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Probably- but I would make sure it isn’t something simple like a dragging brake first.

If it does end up being a rusty R&P you are not alone having to do rework.

 
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