Took a look at the bottom of my E6 and there is no obvious bottom plate; just a grease port above the gear; checked and there is a small amount of lateral movement (maybe 1/16") in the gear truck but no up and down movement; the other un-driven truck has a little more lateral movement but no up and down movement; there is a little slack between the gear on the axle and whatever drives it.
Regarding removing the shell, found a number of screws under the cab but no obvious ones in the front. Will wait to see if Stephen can offer some photos or instructions on that.
