O/T - What does 1/4 ton, 1/2 ton, 3/4 ton mean? - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 09-20-2003, 07:08 AM Thread Starter
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O/T - What does 1/4 ton, 1/2 ton, 3/4 ton mean?

I always hear these terms used when referring to trucks and jeeps. I know that 1/4 ton vehicle is smaller than 3/4 ton, but other than relative size what does it signify? It can't be vehicle weight, since my 1/4 ton CJ-5 weighs almost 2 tons (3720 lbs). Is it the amount the vehicle can carry? Inquiring minds want to know.
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post #2 of (permalink) Old 09-20-2003, 08:14 AM
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Re: O/T - What does 1/4 ton, 1/2 ton, 3/4 ton mean?

its a rating for the amount the rear axle (front axle) can handle
1/2 ton dana 44's amc 20's gm 10 bolt
heavy half ton dana 44 (8bolt) gm 12 bolt
3/4 ton dana 60 (rear) gm 14 bolt (diamond style cover)
1 ton dana 70 dana 60 (front) gm 14 bolt rear
also 70's were also considered 1 1/4 ton axles in certain applications

These are just basic examples
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post #3 of (permalink) Old 09-20-2003, 11:05 AM
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Re: O/T - What does 1/4 ton, 1/2 ton, 3/4 ton mean?

Way back when, before the crust cooled, the lightest pickup trucks had a carrying capacity of around 1,000 pounds. The next step up could carry about 1,500 pounds and so on. The 1/2 ton, 3/4 ton designations have stuck around in popular use, even though manufacturers don't refer to them that way, and a typical 1/2 ton can carry in the neighborhood of 2,000 pounds of payload.
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post #4 of (permalink) Old 09-21-2003, 07:26 PM Thread Starter
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Re: O/T - What does 1/4 ton, 1/2 ton, 3/4 ton mean?

Thanks jeeps4ever and Jim Lou, I was thinking it had something to do with load capacity. Just one of those trivia questions that drive you nuts until you get an answer. Like what is the origin of "the whole nine yards"?

Thanks guys. [img]images/graemlins/40BEER.gif[/img]
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post #5 of (permalink) Old 09-22-2003, 09:35 PM
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Re: O/T - What does 1/4 ton, 1/2 ton, 3/4 ton mean?

The answer is the amount of weight carried but there are a lot of differences. Frames are stronger. Shocks, leafsprings, axles, and even the gears and pinions are bigger. Usually the front asxle universals are bigger too.
post #6 of (permalink) Old 09-24-2003, 01:43 AM
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Re: O/T - What does 1/4 ton, 1/2 ton, 3/4 ton mean?

[img]images/graemlins/tongue.gif[/img] This 1/4, 1/2, 3/4 ton designations are pretty much meaningless now since they have been stretched to fit over a wide range of vehicles. Actually, those designations go on up to heavy trucks, and it's the same thing there. You can have one 3/4t pickup sitting there with a GVW rating of maybe 6,000 pounds; no floating axles in the rear, and liddle biddy brakes. [img]images/graemlins/frown.gif[/img] Then there is another 3/4T with an 8200 pound GVW, a full floater in the rear and huge brakes. [img]images/graemlins/crazy.gif[/img] A fully dressed Cummins diesel engine weighs about a ton, and I'd like to see someone load a "3/4T"....in NAME only.....or a "heavy half-ton"pickup with one and take off headed for the opposite coast at sixty miles per hour....sustained. [img]images/graemlins/laugh.gif[/img] [img]images/graemlins/laugh.gif[/img] OOOOOOhhh Yeah! [img]images/graemlins/laugh.gif[/img] I don't call anything a (true) 3/4T unless I can see those big floating axles sticking out. [img]images/graemlins/crazy.gif[/img] But then I'm just a crotchety old engineer and, well, I kind of LIKE the whole idea of having double Timkens holding those rear hubs on there. [img]images/graemlins/crazy.gif[/img]
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post #7 of (permalink) Old 09-25-2003, 03:01 PM
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Re: O/T - What does 1/4 ton, 1/2 ton, 3/4 ton mean?

The whole nine yards is from one of the world wars, where one of the planes, carried nine yards of belt ammo in thier gun, so shooting all of thier ammo at another plane, was giving them the whole nine yards. The idea is right, but sorry about the specifics [img]images/graemlins/wink.gif[/img]
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