47-55.1 Frame Crossmember (with Knee Braces) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Dachshund · 05-28-2019, 06:05 PM

I am working on a 1947 (2) 3600. My frame crossmember that goes between the front mounts of the leaf springs - is shot! The "Knee Braces" are completely rusted out. I can't seem to find one anywhere, so thought I would fab one. I saw one a few months back that was ideal, but can't seem to find it now! My computer crashed, and I lost it....
So....anyone fab something up and have a photo or two? Thanks!

**mr48chev** · 06-02-2019, 01:30 AM

That made the old guy use all his search tactics. Between critical measurements of how high it needs to be where the radiator support sits and where the holes need to be This should give you some ideas on fabbing one https://www.speedwaymotors.com/Radia...kup,63704.html
You can take the measurements off what's left of your old one before you remove it as how far The surface where the core support bolts on is below the top of the frame rail.

GreasyLikeaBurger · 06-02-2019, 09:02 PM

another angle and the difference between GMC And Chevrolet, chekc out Jim Carters tech pages.
http://oldchevytrucks.com/blog/index...nd-gmc-frames/

**mr48chev** · 06-02-2019, 09:10 PM

That's a good page to save for when folks what the difference is.

05-28-2019, 06:05 PM	#1
Dachshund Registered User Join Date: Oct 2018 Location: Trenton MO Posts: 201	Frame Crossmember (with Knee Braces) I am working on a 1947 (2) 3600. My frame crossmember that goes between the front mounts of the leaf springs - is shot! The "Knee Braces" are completely rusted out. I can't seem to find one anywhere, so thought I would fab one. I saw one a few months back that was ideal, but can't seem to find it now! My computer crashed, and I lost it.... So....anyone fab something up and have a photo or two? Thanks!

06-02-2019, 01:30 AM	#2
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,705	Re: Frame Crossmember (with Knee Braces) That made the old guy use all his search tactics. Between critical measurements of how high it needs to be where the radiator support sits and where the holes need to be This should give you some ideas on fabbing one https://www.speedwaymotors.com/Radia...kup,63704.html You can take the measurements off what's left of your old one before you remove it as how far The surface where the core support bolts on is below the top of the frame rail. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

06-02-2019, 09:02 PM	#3
GreasyLikeaBurger Registered User Join Date: Oct 2015 Location: Costa Mesa, CA Posts: 190	Re: Frame Crossmember (with Knee Braces) another angle and the difference between GMC And Chevrolet, chekc out Jim Carters tech pages. http://oldchevytrucks.com/blog/index...nd-gmc-frames/

06-02-2019, 09:10 PM	#4
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,705	Re: Frame Crossmember (with Knee Braces) That's a good page to save for when folks what the difference is. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.



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