so i was trying to change the differential oil for the first time since i own the car(almost 3 years and over 308K on the car)..i got the fill bolt out easy but the drain bolt stripped to almost a full circle...is there any other ways to get it off or do i have to take it to the shop??

 

You could just get by with not using the drain bolt at all. Get a manual pump and hose and pump oil out the fill hole. Then re-fill.

 

if you know someone with a welder you can just weld a bolt to it just to get it out. It is not the ideal way to do it but it works.

 

has anyone heard of or used this product http://align-rite.com/screwgrab.html before? do you guys think it's strong enough my situation?

 

picture is up now.

 

No way will that screwgrab work.

A 'plug' type screw is especially hard to get out if it's overtorqued and stripped, because the threads are at a larger circumference than the driver and has a torque advantage.

Nothing short of welding a bolt, or drilling it out with a very large drill bit, or slotting the plug, will help you here. Drilling it out and slotting it are particularly difficult as it's countersunk.

Easiest way by far is just not to deal with it. A hand pump is less than $20 at most autoparts stores. You'll easily get 90% of the oil out with that tool and just refill.