Thinking about a mild drop - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Already Gone** · 10-15-2015, 09:28 AM

My 72 C10 has the factory trailing arm suspension with the Auxiliary Rear Spring ( RPO G60) and my question is, if I went to a 2 1/2 inch front spindle drop with a 4 inch dropped rear spring with a Hellwig bolt on rear sway bar would I have to remove my Auxiliary Spring from the truck?

Pro Performance · 10-15-2015, 10:02 AM

Yes, I would remove those springs, as they were intended for an overload spring. When the suspension drops, due to an increase in load, the trailing arms will contact the spring. When installing the lowering springs, it will more than likely put that trailing arm in contact with the overload at ride height, and would cause a harsher ride because of it.

**Already Gone** · 10-15-2015, 10:09 AM

Thanks for the quick response.

10-15-2015, 09:28 AM	#1
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,143	Thinking about a mild drop My 72 C10 has the factory trailing arm suspension with the Auxiliary Rear Spring ( RPO G60) and my question is, if I went to a 2 1/2 inch front spindle drop with a 4 inch dropped rear spring with a Hellwig bolt on rear sway bar would I have to remove my Auxiliary Spring from the truck? __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021

10-15-2015, 10:02 AM	#2
Pro Performance Registered User Join Date: Aug 2010 Location: AZ Posts: 3,069	Re: Thinking about a mild drop Yes, I would remove those springs, as they were intended for an overload spring. When the suspension drops, due to an increase in load, the trailing arms will contact the spring. When installing the lowering springs, it will more than likely put that trailing arm in contact with the overload at ride height, and would cause a harsher ride because of it.

10-15-2015, 10:09 AM	#3
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,143	Re: Thinking about a mild drop Thanks for the quick response. __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021

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