worried

yesterday i got a good price on a 4.10 geared 81/4" inch rear, so i bought it, put it under my car, let out some more air out of my rear tires took a short drive to get everything warmed up and cant here anything strange it workd as suposed then i start som testing at a very good place where i do lots of testing of starting, and and those 4.10 gears realy makes a diferense... the sad thing is that after maybee 6-7 starts i feel comfortable with it and realy gives it all it can take without loosing traction trying to find the limit, BIG BANG half an hour later in the garage i find that there is nothing left worth caling a ring gear...... later i had a walk with my dog and when i walk by the place i use to test on i can see that there has been some small oil leeks.. gues the rearend housing started to flex and thats why the gears died... i am very close to give up and let it all be until i get a better rear.. i still have my old rear in the garage but it feels soo bad when i put a lot of efort into geting something done and then it just breaks.... :sad11: ](*,)