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sorry I hadnt logged on in awhile: Anyway here is how it goes....after you take the shell off follow these steps 1. Disconnect the wires to the truck from the light board 2. pop off the worm cover and the truck should pretty much fall out. if the wires get stuck in the tape just gently pull them out 3. Take the bottom cover off of the truck. THIS IS IMPORTANT. if you have never taken the trucks off the engine before keep in mind it IS NOT like a normal athearn. Looking down on the truck with it sitting on the table wheels down you should see 4 very small square shaped clips. Use a small pocket knife blade to gently pry them free. I find a screwdriver cant get under them, thats why I use a pocket knife, so dont get the idea you have to cut them. 4. you can now pull the bottom cover off of the truck. Only after this is off will the sideframes pull loose so dont try and get them off before the bottom cover. 5. The sideframes should pull out easily. lay the sideframes detail-down on the table and select a drill bit slightly larger than the "hole" (cant think of a better word) that the center axle goes into. 6. And this is the tricky part, drill slowly throught the brass pickup, you have to drill far enough to give you the movement needed in the axle but dont drill through the sideframe! The engine would still run if you did but it sure wouldnt look good. 7. Put the axle in one of the end "holes" and see how much it moves up and down. Then try it in the middle "hole" you just drilled larger. The middle one should allow more movement of the axle. 8. reassemble the truck. sideframes on first, then snap the bottom cover on. Be sure to snap it on tightly. 9. Run the engine! see if it still derails. If it does drill the "hole" one size bigger until you get a good-running engine. Just a few tips: Do one truck at a time because the driveshafts are not equal length and can easily be confused. and dont start with a big bit. Start only a little larger than the "hole". If it still derails you can always drill it bigger. And frequently stop drilling and pick out all the brass shavings that get caught in the "hole" or they can make a real mess of things if they build up. Sorry for my excessive use of "hole". couldnt think of the real word for it. Hope this helps [:D]
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