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I bought it used and never had it in a car.  The best we can tell, someone put a huge load on the nose (part reaching out of the case) and bent it.  Almost unnoticeable.  Fortunately, after having it rebuilt, I added oil and turned the hubs (right name?) to distribute the oil.  I noticed a very slight wobble of the shaft, but enough to probably destroy an engine.

Sounds like the 160-lb box was dropped on its nose. At $2500 (NOS), it might be economic to check with a race shop to see if they could correct (and guarantee it!) for less. Not sure how the hardening is done and I wouldn't try cold-bending it. Sometimes small gear shaft sections are hardened all the way thru which makes them brittle at the transition in sizes. 

What might work at home for poor boys is to chuck it up in a lathe and grind the nose true, then forever after, use a custom ID pilot bushing on that shaft. There really isn't much side force on the nose while running so it should be OK if the bellhousing and block are square. Not for racing, though.

A few minutes on Google with the phrase 'straightening gears and shafts' yielded multiple hits for shops all over the country that regularly straighten gear shafts. I know nothing of any of them, but they ARE available.

The very first question will probably be, 'what kind of steel is it?'  ZF made their own gears in Germany, and when Ford critiqued the tranny back in the GT-40 days, they tested the parts and found ZF's steel was better than what Ford was selling in their own transmissions.

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