1/2 ton or 1 ton crossmember - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Malibob · 02-17-2010, 11:35 AM

Is there any difference between the 1/2 ton, 3/4 ton or 1 ton crossmembers? I am buying a 1 ton crossmember (hopefully) to chop for my 1/2 ton C-10. Anyone know if I should watch out for anything?

62gmc910 · 02-17-2010, 01:15 PM

I believe that the lower A arm cross shafts mount Differently so if you are using 1/2 ton A arms you might want to check that out , and they may be heavier ??

Imperial Kustom · 02-17-2010, 01:18 PM

The cross shafts on the 3/4 and on ton lower control arms are bigger, therefore the mounts on the crossmember are also bigger. the crossmember dimensions i believe are the same though, but don't quote me on it!

**Captainfab** · 02-18-2010, 01:13 AM

What vintage crossmember are we talkin?

Malibob · 02-18-2010, 08:17 AM

Thanks for the help so far guys.

Captainfab- I have a '65 and the donor crossmember I found was from a 1 ton dually. Real good price, $35 less than anyone else. So I wanted to use it, but if it required more work, then I will invest the money.

**Captainfab** · 02-19-2010, 02:06 AM

Is the Dually crossmember a '63-'66, '67-'72 or a '73-'87?

Malibob · 02-19-2010, 08:08 AM

'85

**Captainfab** · 02-20-2010, 02:31 AM

That will use the round LCA shafts. I'm pretty sure that the LCA shafts are the same size between C10,C20 and C30 within the '73-'87 years. What lower control arms are you going to use?

02-17-2010, 11:35 AM	#1
Malibob Registered User Join Date: May 2009 Location: Pittsburgh Posts: 392	1/2 ton or 1 ton crossmember Is there any difference between the 1/2 ton, 3/4 ton or 1 ton crossmembers? I am buying a 1 ton crossmember (hopefully) to chop for my 1/2 ton C-10. Anyone know if I should watch out for anything? __________________ This statement was made possible by a grant from this station and continued support from viewers like you. Flickr

02-17-2010, 01:15 PM	#2
62gmc910 Registered User Join Date: Nov 2009 Location: Cremona AB Canada Posts: 370	Re: 1/2 ton or 1 ton crossmember I believe that the lower A arm cross shafts mount Differently so if you are using 1/2 ton A arms you might want to check that out , and they may be heavier ?? __________________ 62 GMC 910 short fleetside 454 super t10 14 bolt w/gov lock 70s c20 front discs (built in the 80s) 65 GMC 930 dualwheel 292 4spd all origonal 39k mi(my sons truck) 63 GMC 950 camperized school bus, (Gus the bus) 350 4speed 2 speed rear 64 GMC 950 "spare" bus 283? 4speed detroit locker 53 GMC 1ton dual wheel bus 78 GMC c25 short course off road race truck(son's truck) 355 th400 14 bolt (www.wheel2wheel.ca) 88 Peterbilt 379 longhood (hauls race truck)

02-17-2010, 01:18 PM	#3
Imperial Kustom 100% gearhead Join Date: Apr 2007 Location: Boise, Idaho Posts: 313	Re: 1/2 ton or 1 ton crossmember The cross shafts on the 3/4 and on ton lower control arms are bigger, therefore the mounts on the crossmember are also bigger. the crossmember dimensions i believe are the same though, but don't quote me on it! __________________ Imperial Kustom LLC Meridian Idaho. I never stopped playing with cars, they just got bigger.

02-18-2010, 01:13 AM	#4
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: 1/2 ton or 1 ton crossmember What vintage crossmember are we talkin? __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

02-18-2010, 08:17 AM	#5
Malibob Registered User Join Date: May 2009 Location: Pittsburgh Posts: 392	Re: 1/2 ton or 1 ton crossmember Thanks for the help so far guys. Captainfab- I have a '65 and the donor crossmember I found was from a 1 ton dually. Real good price, $35 less than anyone else. So I wanted to use it, but if it required more work, then I will invest the money. __________________ This statement was made possible by a grant from this station and continued support from viewers like you. Flickr

02-19-2010, 02:06 AM	#6
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: 1/2 ton or 1 ton crossmember Is the Dually crossmember a '63-'66, '67-'72 or a '73-'87? __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE

02-19-2010, 08:08 AM	#7
Malibob Registered User Join Date: May 2009 Location: Pittsburgh Posts: 392	Re: 1/2 ton or 1 ton crossmember '85 __________________ This statement was made possible by a grant from this station and continued support from viewers like you. Flickr

02-20-2010, 02:31 AM	#8
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: 1/2 ton or 1 ton crossmember That will use the round LCA shafts. I'm pretty sure that the LCA shafts are the same size between C10,C20 and C30 within the '73-'87 years. What lower control arms are you going to use? __________________ Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE Last edited by Captainfab; 02-20-2010 at 02:35 AM.

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