I saw this happen to a guy at my track. His problem was the driveshaft was too short. During the normal suspension travel it would pull out too far and get into a bind that didn't allow it to go back in.
Put it up on jackstands and see how much it pulls out.
found out the problem... the drive shaft was bottoming out at one point the u-joints flattened and put he shaft in a bind ... problem solved.. thanks everyone for there opinion it was a real mind twister
well i broke another housing this time its on a powerglide cracked right buy the reverse band... with the rear end jacked up with out springs in i still have about 2ins of space between the driveshaft and housing.. i had soild motor mounts with a stock rubber mount for the trans... im going to have the driveshaft balance this week. and weld a x brace...
i was afraid you were checking this wrong when you posted this...glade you finally got it sorted out!!
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