t55 torx bit for gear box filler 32mm or 1 1/4 spanner for drain plug (some use cheap pump up garden spray kit for refilling ,1/2 4-6 inch extension and ratchette for tt/box filler and 17 mm spanner for drain plug, t/box can be filled through center seat panel if removed with some pipe and small funnel,axles 1/2 drive ratchette for both , oil filter removal tool ,21mm or 13/15 socket for rad and thermostat housing bungs (best replaced with brass ones err4686B )allways remove both to fill system and thermostat one for level checking as expansion tank level doesnt indicate engine level allways fill all to over flowing excess will come out of cap till level correct ,there should be enough height under defender to get under but get ramps if you want to use wheeled laying board