Axle differential problems

Fix it yourself man, I figure your asking here for a reason, plenty of resources here, these cars are too old to have someone else repair it, it isn't cost effective.

Does the rear end go 'BANG!' When you go from reverse to forward? I'd say pop off the diff cover with a catch pan under it and look for metal flakes in the oil, and any wear in the gears with a light, go from there.