1/2-3/4 ton frame difference - The 1947 - Present Chevrolet & GMC Truck Message Board Network

FRENCHBLUE72 · 07-05-2003, 07:09 PM

I had to put a new frame under my 1/2 ton 72,I replaced it with a 69 3/4 ton frame . I swaped the front cross member,rear trailing arm set from the 1/2 ton on to the 3/4 ton frame. Everything seemes to fit fine but I have heard the frame's are not the same. What's the difference and can I use 1/2 ton bodymount's on the 3/4 ton frame??? Thank's in advance.

crazy longhorn · 07-05-2003, 07:19 PM

the rear cab mount cushions are different (taller) on the 3/4 ton 2 wds, & also on the 4 wd trucks. the bracket on the frame is also different, so I would just use 3/4 ton cab mounts. Good luck,crazyL

Huck · 07-05-2003, 07:19 PM

. No expert but---I know that the rear cab mounts on the 3/4 ton are lower then on the 1/2 ton which results in having to use different cab mounts. I would expect that you can use 3/4 ton mounts on your 1/2 ton cab with no problem as long as you use that stratgy all the way thru. The actual frames appear to be the same to me---size, weight, design, etc. Where you get into problems is 4x4 is defferent then 2x4. You also have different mounting between rear leaf springs verses coil. Hope this helps---Huck

FRENCHBLUE72 · 07-05-2003, 07:22 PM

Thank's for the quick replies..

07-05-2003, 07:09 PM	#1
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,608	1/2-3/4 ton frame difference I had to put a new frame under my 1/2 ton 72,I replaced it with a 69 3/4 ton frame . I swaped the front cross member,rear trailing arm set from the 1/2 ton on to the 3/4 ton frame. Everything seemes to fit fine but I have heard the frame's are not the same. What's the difference and can I use 1/2 ton bodymount's on the 3/4 ton frame??? Thank's in advance. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

07-05-2003, 07:19 PM	#2
crazy longhorn Fabricate till you "puke" Join Date: Jun 2002 Location: Ill Posts: 9,402	the rear cab mount cushions are different (taller) on the 3/4 ton 2 wds, & also on the 4 wd trucks. the bracket on the frame is also different, so I would just use 3/4 ton cab mounts. Good luck,crazyL __________________ 69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears....

07-05-2003, 07:22 PM	#4
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,608	Thank's for the quick replies.. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

07-05-2003, 07:19 PM	#3
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,269	. No expert but---I know that the rear cab mounts on the 3/4 ton are lower then on the 1/2 ton which results in having to use different cab mounts. I would expect that you can use 3/4 ton mounts on your 1/2 ton cab with no problem as long as you use that stratgy all the way thru. The actual frames appear to be the same to me---size, weight, design, etc. Where you get into problems is 4x4 is defferent then 2x4. You also have different mounting between rear leaf springs verses coil. Hope this helps---Huck



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