I am trying to put a track only car together on a BUDGET and have a question about the rear end, I have a 9 bolt posi unit that has 2.77 gears on it and a 9 bolt open rear that has 3.23 gears on it, since its only a track car can I open up the rear end (the one with the 3.23's) and weld the differential parts together, I mean the spider gears and carrier and all the moving parts except where the axles slide into. I don't want to spend the money for a new or rebuilt 3 series posi unit and I can't find a full spool for a 9 bolt.

as I said, I know this sounds like a dumb idea but I have alot of other things to buy and not a very big wallet.

 

sure you can weld it, will it be safe or legal is another question all together

 

ive heard of people welding the gears then having them bust and car and people go bye bye
i wouldnt do it