the fluid off of the chain 106 the thrown fluid may splash against the wall 114 coating the wall 114 or splash off of the wall 114 into the tub 112 as indicate by the path of arrow b thrown fluid that coats the wall 114 may collect on an extension 118 i e a detent formed on or mounted to the wall 114 and positioned to drip the collected fluid into the tub 112 located below it should be noted that the lubrication system 110 would also function if the chain 106 were rotating counterclockwise as it would be if the vehicle 100 of fig1 were facing the opposite direction than that shown during towing in that instance fluid would be thrown from the chain 106 in a different pattern but would still be collected in the tub 112 the tub 112 is formed with a spillover lip 120 which causes collected fluid 132 to spill out from the tub when it reaches a predetermined level i e the bottom of the lip 120 to maintain no more than the predetermined level of fluid in the tub 112 referring to fig3 a tube 122 extends downward from an opening 124 in the tub 112 and connects to.