Stripped transmission filler hole. 2011 Isuzu Dmax
 

Hey guys just seeing what my options are?
Brought a 2nd hand 2011 Isuzu Dmax 4x4 with the 5 speed manual gearbox.
Did all the fluids and when I got to the transmission, the filler hole was easy to undo. Didn’t notice the hole was stripped until replace fluids and tightened the bolt. The bolt isn’t tight tight, but tight enough that it hasn’t unwound itself. There is visible spillage seeping out of it though after driving. Not a lot.
Can I JB weld it and top transmission fluid from the shifter hole in cab or will I need to helicoil it? Or what other options do yous recommend?
Cheers guys.