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04-13-2024, 02:04 AM
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#1 |
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Registered User
Join Date: Jan 2017
Location: Sandy, UT
Posts: 191
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Heaviest GVW on a square body?
I've seen square body trucks with rollback bodies on them, and would like to buy or build one someday. But I'm having a hard time imagining how anyone hauls anything with them?
The cab and chassis crane truck in my signature has the narrow C&C 14 bolt, which is the heaviest axle I've ever seen in a square. GVW per the door sticker is 10k lbs. I'd guess the truck and cab are at least 4500 lbs with a 350 and 2wd 4 speed, likely more if it was a big block and 4wd. An aluminum rollback bed is probably at least 2k. So at the absolute maximum, a wrecker body on my truck could carry up to 3500 lbs without being over GVW. Once you figure the driver and passenger and under body toolboxes full of stuff, I could barely tow my Corvette without being overweight. Are there heavier GVW square bodies out there, or are people who build rollbacks on these just overloading their trucks and hoping the cops don't ask any questions?
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1988 "Crane Truck" C30 - 350, SM465, with a 15' knuckle crane - thread 1986 M1009 - 6.2 Diesel, SM465, 2 speed aux trans, NP205 - thread 1979 Corvette - 350 T5 1977 Jimmy - 350, TH400, NP203 1982 Blazer - 350, 700R4, NP208 - Totalled, now a parts truck  Scratch built 16' flatbed trailer - thread |
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04-13-2024, 12:46 PM
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#2 |
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At the body shop.
Join Date: Aug 2009
Location: Land of fruits and nuts.
Posts: 5,130
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Re: Heaviest GVW on a square body?
Ours was terribly overloaded with about anything on the deck.
Much less with a 24' car trailer behind it, not to mention no trailer brakes. As I recall it was 8500lbs empty
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" That didnt make it any newer " " Dont antique the equipment " |
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04-13-2024, 06:44 PM
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#3 |
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Gentleman Jim Driver
Join Date: Nov 2002
Location: Poulsbo, WA
Posts: 1,550
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Re: Heaviest GVW on a square body?
The highest GVW I've seen is 10500 for 2WD, 11000 for 4WD. C30/R3500 or K30/V3500 with dual rear wheels and C7C (2WD) or C7E (4WD), heavy duty chassis option.
The payload capacities are very close because the 2WD truck itself it lighter with the 2WD front end vs front axle and no transfer case. Also, the shorter wheelbase Cab and Chassis has the highest payload because the suspensions are the same between the 135.5" cab and chassis, 159.5" long cab and chassis, and the 164.5" crew cab frames but the short one (not short bed, shorter of the cab and chassis trucks) weighs the least.
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Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed |
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04-17-2024, 10:11 AM
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#4 |
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Next!
Join Date: Jan 2003
Location: Eastern Pa.
Posts: 2,478
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Re: Heaviest GVW on a square body?
Yes, my 86 K30 C7E dump has an 11,000 GVW rating. Can haul about 3000 pounds legally. Compare that to my 2020 Silverado 3500HD Cab and Chassis which has a 14,000 GVW rating which can haul 2 tons legally because the Utility body on it with tools brings it up to 10,000 lbs. empty.
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86 K30 CUCV M1028A1 86 K30 CUCV M1028a2 dually 86 K30 C&C 6.2 4:56s, 4M, 11,000 gvw, ex fire truck, now lowboy dump More square bodies and CUCVs than I care to admit to 2020 Silverado K3500HD Work truck |
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04-19-2024, 08:07 PM
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#5 |
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N9PHW
Join Date: Jan 2003
Location: PNW USA
Posts: 129
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Re: Heaviest GVW on a square body?
I have an RV conversion Cab/Chassis with 10K GVW but they added 15K rear springs.
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"I got it one piece at a time and it didn't cost me a dime..." |
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