Best thread(s) on undertrays for RWD trucks?

[lasitter]

You have to deal with the driveshaft and different suspensions for trucks compared to smaller and more economical vehicles. I know there have been lots of threads on undertrays, but any help finding the best ones with pictures for RWD trucks appreciated.

Also: Undertray vs "skirts". You see the 18-wheel big rigs on the road with skirts effectively covering the trailer undersides and the fuel tanks.

Are undertrays more effective than skirts?

[Daschicken]

BamZipPow's undertray thread should be useful to you: http://ecomodder.com/forum/showthrea...pan-24777.html

Comparing mods alone, I would guess that an undertray works better than side skirts, but you can combine both of them for an even better effect. Side skirts are a lot easier to make than a whole undertray, that is part of the reason you see those on semis.