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dually half ton?

Yep, I just got online was gonna post up, told the guy I know about this, he swore up and down he didnt grind. He put new calipers, rotors, etc on his when he put his 15's on, he looked last night, apparently they had been ground when he bought em. Dont know if they were turned in as a core and then rebuilt and resold already ground or what, but instead of having all the little casting slag, he says u can see ridges where they have been ground. Pre-clearanced calipers lol.
 
beater_k20 said:
u2slow, what did you say? maybe post it in a language we can understand this time. looks like you've got some latin and some jibberish mixed in there. :rolleyes:


i am correct. the 1973-80, and 1981-1987 GM frame rails for a C/K 10903 and a c/K 20903 (standard cab longbox pickup) carry the exact same part number for the bare frame rails. this very question came up on another board when i was working at the dealership.
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ahhh, i see. So how about the suburbans of the 81-91 flavors?

And also, what about the 88+ trucks? Do they still have the same from the 1/2 to the 3/4?
 
Pookster said:
ahhh, i see. So how about the suburbans of the 81-91 flavors?

And also, what about the 88+ trucks? Do they still have the same from the 1/2 to the 3/4?
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i am not aware of any differences in the 81-91 Suburban frames, although i did not look at them specifically, i just looked at the 1/2 and 3/4 ton longbox standard cabs, as that is what i was asked about. as for 88+ trucks, i couldnt tell you. i stated that i looked for 73-80, and 81-87 trucks, i never claimed i knew anything about 88+ trucks, nor do i see how a 1988 or newer truck has any bearing on the topic at hand. :dunno:
 
beater_k20 said:
u2slow, what did you say? maybe post it in a language I can understand this time. looks like you've got some latin and some jibberish mixed in there. :rolleyes:
Click to expand...

Wow. GM must have written their product training manual in latin & jibberish. I had no idea I was multilingual! :haha:

http://brochures.slosh.com/index.shtml?1977ctv

the 1973-80, and 1981-1987 GM frame rails for a C/K 10903 and a c/K 20903 (standard cab longbox pickup) carry the exact same part number for the bare frame rails.
Click to expand...

I believe you are correct on the K-series...
http://brochures.slosh.com/1977ctv/pickups45.jpg

I'm not seeing it with the C-series... the C20 frame is stronger than the C10 frame from what I can tell.
http://brochures.slosh.com/1977ctv/pickups42.jpg
http://brochures.slosh.com/1977ctv/pickups43.jpg

Whether or not this holds true for other years is anybody's guess...
 
beater_k20 said:
i am not aware of any differences in the 81-91 Suburban frames, although i did not look at them specifically, i just looked at the 1/2 and 3/4 ton longbox standard cabs, as that is what i was asked about. as for 88+ trucks, i couldnt tell you. i stated that i looked for 73-80, and 81-87 trucks, i never claimed i knew anything about 88+ trucks, nor do i see how a 1988 or newer truck has any bearing on the topic at hand. :dunno:
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It doesnt, Im just hijacking. :grin: Was thinking about converting my half ton burb into a 3/4 ton burb.
 
Pookster said:
It doesnt, Im just hijacking. :grin: Was thinking about converting my half ton burb into a 3/4 ton burb.
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POST WHORE! :D i'll see if i cant get back into the dealership parts books this weekend. maybe i can find out some stuff for ya...
 
beater_k20 said:
POST WHORE! :D i'll see if i cant get back into the dealership parts books this weekend. maybe i can find out some stuff for ya...
Click to expand...

*whoring away*... any details yet? :xmas:
 
CHEVY 4WD said:
Im almost citian 3/4ton frames are thicker an dmost already have 56" spring mounts
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No they are not. Only 1 ton frames in the 73-87 body style are thicker and have a taller web spacing making them stronger.

The short bed does have a weaker frame than a long bed half ton though.
 
Don't know if it counts, but my dad snd me converted a 3/4 ton srw into dually. All we did was cut the inner fender wells, made a plate 3inches wide, and "set the inner fenders in". Closer to each other. Result , you lose 6 inches of room between the fender wells, but that's all we had to do. The dually 16" wheels fit right on the D-60 rear. no issues with springs, or hubs. I used 1-ton rotors on my 3/4 ton spindles and they also fit fine. I guess 3/4 - 1 ton is same thing? But this truck is also 2 by too. That may have something to do with it. Also we didn't have to put fenders on it either. A set of fender flares from a jeep worked well. I can get you pic's if needed. Keep us posted, I've often thought of the same thing for "grins and giggles". Just to be different. The only hitch I have is that I think dually's aught to be long beds, it just looks right. LOL. But a ol' 70's shorty truck might just turn out pretty neat.
 
post or send me pictures

My truck is an 87 but it is so hard to find a 1 ton 4x4 in the same shape mine is in without paying 8k . I would trade or sell my half ton off if I could find a k30 dually reg cab in the same shape.

I know pipe dream
 
REDCRO_REDNECK said:
if 3/4 ton fronts are smaller ( than what I think they are)why does one have to grind the calipers to put 15" wheels on them?

15's fit 1/2 ton

besides the rear brakes are a whole lot larger than 1/2 ton drums.
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Most of the time you don't have to grind, but the reason is because of the larger 8 lug hub. The hub center is larger in diameter, that means the rotor center bore has to be larger. They just make the rotor slightly larger in diameter to compensate for the larger hub. The calipers are the same as the half ton. Does this give any better braking? Not really. Maybe SLIGHTLY cooler running temps from a slightly larger rotor but not really noticeable. Regardless, you would notice a big difference in brake performance with a 3/4 set simply from the rear drums. It made a world of a difference under my K5.

IMHO, forget the dually idea and just upgrade axles. I'm sure the shortbed with a 3/4 ton set would do fine. that is how my k5 is setup and I pulled similar trailers and weights fine.
 
1/2 Dually??

So what happened to the truck, did you ever build it..(dually????) Send pics if you did..:confused:
 
Here is the truck 1+ years laterit is a 4" on 285's 4:10 gears, and a rusty door thanks to GM's nifty trim. Also pulling my trialer and project sami.
I am still considering going to a dually set up, but plans are on hold. I am actually trying to keep myself from putting my D60/14bff and 40's on the truck.

6-19-08012.jpg


9-18-08dump007-1.jpg
 
SWEET Truck

That's a sweet shortbed... now I know your concern for keeping it original.. I've got a 76 4x4 sb putting dually rear in it. Send ya pics when I get it done..
 
are you goin for the complete dually look with the fenders or what? I think if I go dually I will put my bed up in storage and use a flat deck.
 
Dually

I'm putting c&c rear axle with duallys under reg bed no dual fenders,, The tire's stick out about 3-4 inches on each side... I might put on a bushwacker fender flare or something, we'll see when I get it done......:D
 
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