Hi Guys,a newbie owner of a small Iseki 2160 4wd.Just replaced a blown frost plug on the engine and ran her up to hot stationary with the attached roatary hoe down on th eground afterwards.Then I noticed frothy creamy greyish white oil bubbling/ooozing out of the filler cap under the tractor seat,over the rear axle,thats if this is the filler cap!!!I drove it several miles home after intial puchase with no problems,only a slight leak from the blown frost plug on the engine...whats my remedy or check from here,is there a heat exchanger/hydraulic oil cooler[which I cant see if indeed there is one !] that might be leaking possibly?Any help thoughts appreciated,while Im mechanicaly minded ,tractors and hydraulics are all new but lifes for learning!Also if I change the fluid in the rear axle what do I use....and are the gearbox and rear axle the same reservoir,phew lota questions cheers Dandog