Rear suspension question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Detmar · 02-25-2018, 05:30 AM

Is the leaf coming from the rear of the truck not touching anything normal? What Am i looking at? And i can't get the dang picture to upload correct.. i flipped it and its still upside down. So my apologies.

Detmar · 02-25-2018, 05:31 AM

And now it's correct.. even though the preview showed it wrong..

Aus69c20 · 02-25-2018, 05:36 AM

It’s an overload spring. It only touches under a heavy load and helps bear the weight.

Detmar · 02-25-2018, 06:36 AM

Thank you my initial thought was they were something like that. Now that i know what they are called. I quick Google search gave me some great info. Helper springs seems to be another common name for them.

Mike C · 02-25-2018, 04:17 PM

Usually helper springs are an add on for leaf springs. The overload leaf on your truck is a GM factory option for the coil spring rear.

Detmar · 02-25-2018, 08:43 PM

Quote:

Originally Posted by Mike C

Usually helper springs are an add on for leaf springs. The overload leaf on your truck is a GM factory option for the coil spring rear.

Thanks for the info! Love learning every detail about my truck. just read that its a stock 3.73 rear end it as well. on the spid anyways now to see if its in there still. i think its a 12 bolt main.

Mike C · 02-25-2018, 09:25 PM

It is a 12 bolt. But main has nothing to do with the rear axle. Enjoy your truck as it sounds like you are!

Aus69c20 · 02-26-2018, 12:42 AM

Unless you’re using your truck to cart heavy loads on a regular basis you could probably remove them. They weigh a fair bit and are relatively easy take off or replace if you need.
My truck leads an easy life now so I took mine off.

**Ironangel** · 02-26-2018, 02:39 AM

Pop the cover off your differential to see if you have a 12-bolt posi, and drop the oil pan to see if you have a 4-bolt main motor...Enjoy your classic ride!

02-25-2018, 05:30 AM	#1
Detmar Registered User Join Date: Feb 2018 Location: Wishram, Washington Posts: 35	Rear suspension question Is the leaf coming from the rear of the truck not touching anything normal? What Am i looking at? And i can't get the dang picture to upload correct.. i flipped it and its still upside down. So my apologies. Attached Images

02-25-2018, 05:31 AM	#2
Detmar Registered User Join Date: Feb 2018 Location: Wishram, Washington Posts: 35	Re: Rear suspension question And now it's correct.. even though the preview showed it wrong..

02-25-2018, 05:36 AM	#3
Aus69c20 Registered User Join Date: Jun 2015 Location: Melbourne, Australia Posts: 231	Re: Rear suspension question It’s an overload spring. It only touches under a heavy load and helps bear the weight. __________________ John 69 c20, 396, th400, dana60, ps, ac

02-25-2018, 06:36 AM	#4
Detmar Registered User Join Date: Feb 2018 Location: Wishram, Washington Posts: 35	Re: Rear suspension question Thank you my initial thought was they were something like that. Now that i know what they are called. I quick Google search gave me some great info. Helper springs seems to be another common name for them.

02-25-2018, 04:17 PM	#5
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,727	Re: Rear suspension question Usually helper springs are an add on for leaf springs. The overload leaf on your truck is a GM factory option for the coil spring rear. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

02-25-2018, 09:25 PM	#7
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,727	Re: Rear suspension question It is a 12 bolt. But main has nothing to do with the rear axle. Enjoy your truck as it sounds like you are! __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

02-26-2018, 12:42 AM	#8
Aus69c20 Registered User Join Date: Jun 2015 Location: Melbourne, Australia Posts: 231	Re: Rear suspension question Unless you’re using your truck to cart heavy loads on a regular basis you could probably remove them. They weigh a fair bit and are relatively easy take off or replace if you need. My truck leads an easy life now so I took mine off. __________________ John 69 c20, 396, th400, dana60, ps, ac

02-26-2018, 02:39 AM	#9
Ironangel Senior Member Join Date: Feb 2010 Location: Falls City, Nebraska "100 Miles From Nowhere" Posts: 2,219	Re: Rear suspension question Pop the cover off your differential to see if you have a 12-bolt posi, and drop the oil pan to see if you have a 4-bolt main motor...Enjoy your classic ride! __________________ Michael of the clan Hill, "Two Seventy Two's" 71 1-ton Dually 350 4-Speed 71 C/50 Grain Truck, 350 Split-Axle 4-Speed 02 3/4 ton Express 14 Indian Chief Vintage 1952 Ford 8N, "Only Ford Allowed On The Property" "Be American, Buy American"

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