Been keeping my eye open for a truck for a few years now to put the box onto from our old Bruin. It needs to have a long frame as it's a 22 foot box. Came across a '94 Mack RD688 I believe it is the other day. Has the E7 @ 350 horse, 4.64 rears, 18,000 front axle and 44,000 rears. Looks to be in decent shape, few little things but nothing I can see too bad. No oil leaks anywhere. Biggest question I guess is about the transmission. It has a 12 speed air shift. What are they like? Just has the one shift lever, not 2 like some did. Never drove one like this before, might give it a test drive next week. It's no Cadillac by any means, rugged work horse, completely mechanical. Just going to be for a second truck/backup/yard truck. Anyone have one or used one before? Not sure the actual hours or miles, but sounds like it had a somewhat easy life as a potable water hauler for a camp out west then a construction company in Manitoba bought it thinking it was for spreading water on jobs sites so never used it. Whether that's the truth, I can't confirm.