Popular Post Mack man 1973 Posted April 10, 2017 Popular Post Share Posted April 10, 2017 Well I got a contract painting these knuckleboom cranes and I needed to truck them back and forth so the old R has a job to do again besides just sitting in the barn . I started trucking these in January but I didn't want to get salt on the old girl so I used a ch and a cxu to haul them . Well this is the first load I have ever hauled on this truck and the first time I have ever used a maxidyne to pull a load and I must say these old 675 can get the job done just as well as anything . I was amazed how well it did compared to engines with twice the horsepower . The ch I used had a e7 427 with a ten speed and the cxu I used had an mp 7 with a 13 speed Both did a super job . However the 675 237 hp had plenty of that low end torque to get the load moving I think it had more out of the hole than the others . But with a five speed and 417 gears the top end suffers. But you don't need to move a load at 80 mph anyways . I've seen many questions on here if an engine with 237 hp can get the job done and I would say hell yes and you do not need 500 hp or more to pull a load with ease down the road 7 Quote Link to comment https://www.bigmacktrucks.com/topic/49473-1972-r-600-comming-out-of-retirement/ Share on other sites More sharing options...
h67st Posted April 10, 2017 Share Posted April 10, 2017 That's a fine looking rig...love those old lowboys! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/49473-1972-r-600-comming-out-of-retirement/#findComment-366949 Share on other sites More sharing options...
mowerman Posted April 10, 2017 Share Posted April 10, 2017 ya nice lookin ride.....love the shop....im putting one up myself right now not quite as big....and yes i run a 237 years ago pulling doubles up the grapevine,,,, i hated it...be down to 10 mph with 40 Gs.but some of the guys on here would argue that right into the ground.lol.probably good for city work or flat ground.....best of luck to ya...bob Quote Link to comment https://www.bigmacktrucks.com/topic/49473-1972-r-600-comming-out-of-retirement/#findComment-366968 Share on other sites More sharing options...
tjc transport Posted April 10, 2017 Share Posted April 10, 2017 i had a 79 DM800 with a 237 in it. that truck would pull all day long, and never feel anything once the 10 speed was swapped into it. with the aluminum dump body, i would haul 22 ton and keep up with 400 hp R models Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/49473-1972-r-600-comming-out-of-retirement/#findComment-366976 Share on other sites More sharing options...
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