1980 Pony, 2.3, 4 speed manual. Wanted to change the lube in the gearbox with some fresh GL-4. However, searching the forum gave mixed results on wether or not there is a drain plug on the trans. So, do these things have drain and fill plugs or not? If no, besides dropping the trans, are there any methods to perform a lube change? If it has a fill plug, is it feasible to use a suction pump to drain it? Appreciate any advice.