hey i had a hole in my frame where the gearbox is so i took off the box and welded a plate on there. but went to put the box back on and turns out it's stripped and bolts just spin. so i was wondering has anyone esle had this problem and or what's a good solution.

 

If it was mine I would helicoil the stripped holes. I would loctite the helicoils in then locktite the bolts in.