I have made axle nut spanner wrenches by welding pieces of square key stock onto an appropriate-diameter piece of water pipe, and drilling a hole in the pipe for a handle made of round stock. While you have the nut off, use a radiator hose clamp to hold the key stock into the nut slots and weld a pipe to them. You'll have a tool you can pass on to your grandchildren!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!