In this tutorial i will explain on how to make a tank track and then how to animate it, its very easy, in 5 easy steps your done, it will cost you 10 min!. I also learnt this of some tutorials but i cant find them no more on the internet. So i though i going to write one, this is also my first tutorial i wrote ever. And don't watch my English its BAD. Now lets start. 1: Making the Track Segment Ok, first we need to make the segment of the track. We will make for the tutorial a basic track segment of a tiger tank.
Allright lets start. Go to the top view and make a box with the parameters like the picture below.
Now right click the object and covert it editable poly. Now go to poly selection and select the polygons shown in the picture below.
Now press the little button next to the extrude button, now you enter 15 and hit ok.
Now selection the other side of the object the opposite polygons (see picture below) and extrude them also with 15. 
Ok, now go to vertex selection mode, now move the vertex until you got something like the picture below.

No right click the text top view and select the bottom view and select these polygons and bevel them as shown in the picture. 
Now make a new box with the parameter like the picture. And convert it also to a editable poly.

Now go to polygon selection and select the top polygon now extrude him with 8. 
Now go to in vertex mode and to the front view, now select the left top vertex and move them to the right until they looks like the picture, now do the same with the right top vertex. 
Now unselect the vertex selection and press the attach button and select the first object we made (make sure that your object are in place like the picture below) 
Now your 2 object becomes 1, this is were we stop to model the segment for the tutorial.
2: Path for your track Now we must make a path that our track is going to follow. Now make a Line (Shapes-->Line shape) now draw a nice path on how the track must go and then close the spline.
Spline that marks the route of the track. 3: Duplicate the track segment Now its time to duplicate our track segment so that it will be a track. Select the track segment and select the move option now hold down shift and drag the track segment so that the segment fits in the duplicated segment, now you can enter how much copies of the object you want enter a number that fills your path.
I have used 80 copies.
Now we have a rolled out track now select one segment (the last or the first segment) and hit the "attach list" button, now select all the track segment and hit the attach button.
Now we have a object that is the hole track. 4: Letting the track follow a path. Now its time to let the track follow the spline, to do this select the track object and go to the modifiers selection and select PathDeform. Now hit the Pick Path button and select the spline we made.

Now if your track looks weird then check the Path Deform Axis z, x, or y to make it right, if your track is flipped in side out then check "flip". Mostly the track is to small, to make him bigger scale the spline NOT THE OBJECT if your track is in place then you will notice (if you entered to much copies of the track segment) that they track goes in him self (overlapping) or that there not enough track segments , if this is the case then you select the track object and go to element selection of the editable object, now you see your track not following the path anymore, now select the track segment that were to much and delete them or when you want to add some segments, the you must select a track segment and shift drag him to copy it. Now unselect the element selection and select PathDeform (NOT A NEW PATHDEFORM) Now your track goes the path again, look if the track is good, if not delete more segment until the track is good.
Track is overlapping.
5: Animating the Track. This is very easy to do just go in auto key mode scroll to frame 100 and select the PathDeform modifier of the track object and enter a number (like 10) in the percent box and press play, now your see your track move the path. Hope you learnt something, if you have any question e-mail me at: Ninja_game_3d@hotmailcom  Finished track :)
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