un merging a polygon object ???

[Brian Jones]

select the polys of a part you want to separate from the rest and right-click and choose Split (or it’s in the Mesh/Commands menu of 15). Split makes a copy of the selected ploys and puts them in a new object but the original polys are still there in the first object so if you don’t want two tires in the same place hit the delete key right after the Split (the first object stays selected so this gets rid of the polys you were copying). The new object which has the same name as the original object is the separated part you want.

[Adam Trachtenberg]

Another possibility would be to try the “explode segments” command. Any group of faces that isn’t welded to another group of faces will be split into its own object.

[Sid Olomi]

thanks very much for taking time to answer my question it works i just grouped rim and tire together in a null all together for what i wanted to do it worked i just wanted to use connector and motor so the car can drive off lol thanks