Do I need lowering trailing arm cross member? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

64chevmn · 05-09-2021, 08:59 PM

Hey guys; i tried to search and get a strong answer either way, but no luck so i'm looking for some opinions. I'm working on a 1968 C10 short box and doing a static 4/5 drop with lowering springs, drop spindles and shock relocate brackets. So, do you think i need to swap out my trailing arm cross member with a new lowering style to allow more room for the driveshaft and pinion angle? And if i don't need it for a 4/5 drop what about a 5/6 drop? I probably don't need to, but i'm also leaning towards a c-notch.

**lolife99** · 05-10-2021, 12:06 AM

Not needed for a mild static drop like that.
But I do like them for the exhaust openings,... to help raise your exhaust by running it THROUGH the crossmember.

**PGSigns** · 05-10-2021, 07:40 PM

Not a real need for the cross member. Some folks will flip the brackets. You will need about a 3 degree shim for correct the pinion angle.
Jimmy

64chevmn · 05-10-2021, 08:29 PM

Thanks for the response! Exhaust cut-out's was part of my plan so i'll just cut them out of the factory cross member.

**Accelo** · 05-10-2021, 11:42 PM

I just moved them up one bolt hole and re-drilled the top set of holes.
Worked just fine.

05-09-2021, 08:59 PM	#1
64chevmn Registered User Join Date: Sep 2013 Location: Annandale, Minnesota Posts: 216	Do I need lowering trailing arm cross member? Hey guys; i tried to search and get a strong answer either way, but no luck so i'm looking for some opinions. I'm working on a 1968 C10 short box and doing a static 4/5 drop with lowering springs, drop spindles and shock relocate brackets. So, do you think i need to swap out my trailing arm cross member with a new lowering style to allow more room for the driveshaft and pinion angle? And if i don't need it for a 4/5 drop what about a 5/6 drop? I probably don't need to, but i'm also leaning towards a c-notch. Last edited by 64chevmn; 05-09-2021 at 09:35 PM.

05-10-2021, 12:06 AM	#2
lolife99 67-72 parts collector,… Join Date: Nov 2002 Location: Mid-MO Posts: 22,700	Re: Do I need lowering trailing arm cross member? Not needed for a mild static drop like that. But I do like them for the exhaust openings,... to help raise your exhaust by running it THROUGH the crossmember. __________________ Keith Convert to disc brakes. http://67-72chevytrucks.com/vboard/s...d.php?t=444823

05-10-2021, 07:40 PM	#3
PGSigns Senior Member Join Date: Jan 2011 Location: Hayes Va Posts: 4,569	Re: Do I need lowering trailing arm cross member? Not a real need for the cross member. Some folks will flip the brackets. You will need about a 3 degree shim for correct the pinion angle. Jimmy __________________ 60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic

05-10-2021, 08:29 PM	#4
64chevmn Registered User Join Date: Sep 2013 Location: Annandale, Minnesota Posts: 216	Re: Do I need lowering trailing arm cross member? Thanks for the response! Exhaust cut-out's was part of my plan so i'll just cut them out of the factory cross member.

05-10-2021, 11:42 PM	#5
Accelo Senior Member Join Date: Mar 2015 Location: washington Posts: 2,295	Re: Do I need lowering trailing arm cross member? I just moved them up one bolt hole and re-drilled the top set of holes. Worked just fine.

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