I overfilled my suregrip (3.23 742)and when I parked it the last couple times some fluid drained out the yoke end .... now after a few runs around town there is nothing leaking.... would this be normal or do I have a bad seal?? what leaked out was no where near the amount I put in so I'm assuming that I should'nt be concerned or do I need to take it apart??

Oil shouldn't leak out the seal end even if you overfilled it .

could be low and your thinking its over filled

my 742 leaks at the pinion seal,when its at the full mark,it will drip oil for a few days and stop..(not driving it anywhere)

then its low,I can start driving it and it will leak some as it oils the front pinion,gets even lower

so I keep an eye on it and as long as its driping the rust prevention I know its full at a glance

also if you check it jacked up in the front of car it will read low on the mark and will be over filled when level

you should be able to R&R the seal on the 742 pinion,it is set up with a spacer and shims

seal will cost a few bones for the 742 case,the leather ones are not that great and leak,use the newer neoprine one

DoctorDiff has them in stock

If it is way too f ull it can cause the fluid to push past the seal i've seen this at work on motors and shaft seals way too many times.