Originally Posted by corsair23
Are the fill plugs typically "universal" in size? I have a SM420 with the stock Toyota T-Case and wondering if the kit would work for me
They are fairly universal from one old Land Cruiser to another, and even some runner/mini applications, but I know for a fact they are metric (18mm x 1.5mm thread pitch IIRC). I doubt they would work for an old school USA made gearbox.