umodelnut Posted December 8, 2011 Share Posted December 8, 2011 http://www.commercialtrucktrader.com/find/listing/1971-Mack-U600-99182232this is one awsome u model that i would like to have!!! Quote Link to comment Share on other sites More sharing options...
Rob Posted December 8, 2011 Share Posted December 8, 2011 http://www.commercialtrucktrader.com/find/listing/1971-Mack-U600-99182232this is one awsome u model that i would like to have!!! Doesn't look like an 850 Holmes to me. I've owned one, and built a truck with another, and this bed is about half the size and capacity.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
Superdog Posted December 8, 2011 Share Posted December 8, 2011 That would be a fairly rare U ,if the 903 is factory.I've only seen one other. Quote Link to comment Share on other sites More sharing options...
slpwlker Posted December 8, 2011 Share Posted December 8, 2011 What makes the difference between a U and a Dm. with that being a longer Wb.I would of thought a Dm. What am I missing? Quote Link to comment Share on other sites More sharing options...
james j neiweem Posted December 8, 2011 Share Posted December 8, 2011 Superdog St. Johnsbury trucking ran a bunch of twin screw U-models with 903's back in the 70's. Quote Link to comment Share on other sites More sharing options...
shortstack Posted December 8, 2011 Share Posted December 8, 2011 I think the U is just a lighter spec than the DM. Trey Quote Link to comment Share on other sites More sharing options...
slpwlker Posted December 8, 2011 Share Posted December 8, 2011 I think the U is just a lighter spec than the DM. TreyOk thanks. I know Dm's where heavier. But in that application I didn't know Quote Link to comment Share on other sites More sharing options...
shortstack Posted December 8, 2011 Share Posted December 8, 2011 I don't know all the specifics, just remember someone saying that not long ago. I think the DM was more for vocational use where the U was highway. 1 Quote Link to comment Share on other sites More sharing options...
slpwlker Posted December 8, 2011 Share Posted December 8, 2011 thank you Quote Link to comment Share on other sites More sharing options...
David Posted December 8, 2011 Share Posted December 8, 2011 The basic difference is the frame. The U has a R frame. The DM has a frame of it's own with a "deep belly" behind the cab. Quote Link to comment Share on other sites More sharing options...
1958 F.W.D. Posted December 8, 2011 Share Posted December 8, 2011 Dont DM's also have a setback steer axle? Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment Share on other sites More sharing options...
umodelnut Posted December 8, 2011 Author Share Posted December 8, 2011 I think the U is just a lighter spec than the DM. Treyyou are correct trey vinny Quote Link to comment Share on other sites More sharing options...
fxfymn Posted December 10, 2011 Share Posted December 10, 2011 Don't know if its correct, but I was always told the DM stands for Dump/Mixer, so they were designed for heavy duty applications. Quote Money, sex, and fire; everybody thinks everyone else is getting more than they are! Link to comment Share on other sites More sharing options...
leversole Posted December 10, 2011 Share Posted December 10, 2011 R stand for Road Truck?U for Utility?B for BAD-ASS!!!Sounds right to me... 1 Quote Link to comment Share on other sites More sharing options...
tkobes43 Posted December 10, 2011 Share Posted December 10, 2011 R stand for Road Truck?U for Utility?B for BAD-ASS!!!Sounds right to me... Sounds right to me! Quote "Nothing Breaks Wind Like A Bulldog" Link to comment Share on other sites More sharing options...
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