R380 gear box fill plug rounded

In need of more advice just changed all filters engine oil transfer oil and diff oil started to do the gear box went to undo the filler plug and it's round I've made the school boy error of draining the oil before loosening the filler which I can't do any advice would be greatly appreciated I have no access to a welder neither is there any other way of filling

Irwin bolt removers from machine mart moll grips?

Hi, My 04 yr manual model has a TX55 star type filler plug. What type is yours? If a normal or square head, can you get a bolt removal socket on (Erwin bolt remover etc)
Griff

As above mine was torx, are you using the correct size ?

Good luck.

Cheers

Yeah it's a t55 torx buts it's been rounded bolt removers no good can't get it with grips either

May be a long sharp chisel and lots of GENTLE taps may knock it lose

What about filing two opposite edges flat and getting a small spanner on it?

Will try both

May be a bit dodgy, but have you got any plastic metal, JB weld etc? you may be able to get some in there ,push the largest torx you can get in there and let is set. Fingers crossed you may be lucky.

Cheers

Depending upon how rounded it is try tightening it a little before you loosen it, sounds absurd but it usually helps me when I've got something I can't undo

Thanks for the ideas but looks like I'm going to have to get a nut welded on.

pics......

how about a bolt?

Shame, I was hoping the JB weld with a torx inserted into it would do the job.

Cheers