Thanks Guys, my diff is the 8" (and not 9" or LSD) so yeah the Suction Pump/Syringe type will be the way I will go. I will look at the Bolt on diff centre first Muz. As for refill I have a little Arnold Pump I use to drain oil and refill my Ride-On Mower's engine oil. (same as the one in Photo) I won't use it to extract old diff oil as oil may be too thick, but I can use the tubing ! Better than trying to suck it out by mouth and tube, it would taste terrible. Had some Hypoid 90 Diff oil spill in my hair once and it smelled for days !