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>M1078 suspension is burdened via heavy loads occasionally.. while the M10xx is always burdened with a heavy load when the 1079box is on it.
The M1079 frame rail section is braced at the front, rear, and middle. The M1078 upper rail is not, but that it taken care of by the flat bed mounted to it. The M1079 also has plates at the rear of the frame that tie the top and bottom frame rail sections together. That's one of the reasons I swapped all of this onto mine.
The curb weight of my 2008 M1078 A1R is 19,598, GVWR is 24,598, rear axle is rated at 11,158, so I would guess the rear springs in an M1078 A1R are the same as a 1079.
You ran it over the scales? That seems excessively heavy for a 1078. My truck is 21,950 with me and the dog and some gear in the habitat. The M1079 box weighs 3,360 lbs although I did pull about 700 lbs of steel plating out of mine prior to going over the scales.
No, just giving the info off of the plate on the door, but it has to be pretty close or they would be creating a situation where the truck could be overloaded since it states what the GVWR is. If the curb weight is actually only 17,500 and someone loads it to it rated max, you would be putting 7,000 lbs on it.
The winch does add a bit. @Lostchain has a 2003 M1078 w/winch and his truck is 18,500 on the scales. Your truck is probably very similar. Yes you have coil-overs but his truck has cab air ride so probably a wash there. Rear diff probably weighs a bit more but were not talking about 1,000 lbs here. I would be surprised if it was different than his truck by more than 100 lbs.
I'm willing to bet the high pinion rear diff easily adds 200-300 lbs, maybe more. There is a lot of iron in that housing. Anyway, at some point I'll get it on the scales. I have removed a fair amount of weight too. All the cab interior storage, middle seat, troop seats etc.
Doubt it. That's probably about an extra 100 lbs. Wrenching for over 20 years has given me a pretty keen eye for such estimates. And when you subtract the weight savings of your 5 alloy rims it's probably irrelevant. Like I said I bet your truck is within 100 lbs of 18.500 lbs. The cab interior pieces aren't very heavy. And his truck never had troop seats so that's already deducted.
I wasn't trying to say my truck as it sits with the aluminum wheels weighs what the plate on the door says, just what BAE says it weighed as built.
Well - the rims are 250 lbs, but curb weight includes fuel and passengers - full tank is 400 lbs of diesel...... 600 lbs of driver and two passengers.... I doubt the interior bits are more than 100 lbs. Depending on how much fuel you had on the truck at the time - I don't see you getting there without passengers and fuel....
