Rear spring sag?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**DANTIP** · 03-30-2014, 09:19 AM

I just purchased this Blazer and think the rear looks like it rides a little low. It does have HD front suspension. Thinking about replacing rear springs and/or adding supplemental air-springs. Any thoughts??

Dan

mjjjracing · 03-30-2014, 10:56 AM

I think it sits just right , Most Blazers have that stance from the factory and even after you lift them . I would leave it alone myself . Just my 02 cents. Jim , By the way that is a very nice Blazer you have

SACRAMENTO 71 · 03-30-2014, 11:38 AM

Great find! Love that original look and tone of blue.

**DANTIP** · 03-30-2014, 06:06 PM

Quote:

Originally Posted by SACRAMENTO 71

Great find! Love that original look and tone of blue.

Thanks! The truck came with crappy-looking body color rally wheels and 12-year old dry cracked tires. I had the white steel wheels with fresh radials from a truck I recently sold. I love the vintage dog-dish caps! I also added my extreme-bend tow hooks. Runs great and the body/paint work is REALLY nice. I've owned many trucks but this is my first Blazer.

Dan

Jdubs71 · 04-03-2014, 12:15 AM

You could add a leaf to the rear springs to level it out, but when/if you take the top off it might have the opposite affect. Adding a leaf would likely stiffen the ride.

**DANTIP** · 04-03-2014, 07:12 AM

I bought an air spring system that will supplement the rear leaf springs. I hope to get it installed this weekend and I'll share my thoughts afterward.

Dan

GCncsuHD · 04-03-2014, 10:30 AM

Looks fantastic.

Helper bags should help, but honestly, for almost 45 year old springs, I would have just replaced the springs.

You'll have to play around with the pressures in the bags, most of the ones I've dealt with you only run single digit pressures when unloaded, otherwise the rear gets really stiff. That may or may not give you the height you want, but it may give you the adjustability you want between top on/off. I.E. 8lbs top on, 3lbs top off, 30lbs when hauling, etc.

**DANTIP** · 04-03-2014, 10:41 AM

I pulled my 1972 Truck Data Book out and after looking at the drawing showing the Blazer dimensions, the stance on my Blazer looks about right. Notice the rear tire is further up into the wheel well compared to the front. Dan

GCncsuHD · 04-03-2014, 10:48 AM

Quote:

Originally Posted by DANTIP

I pulled my 1972 Truck Data Book out and after looking at the drawing showing the Blazer dimensions, the stance on my Blazer looks about right. Notice the rear tire is further up into the wheel well compared to the front. Dan

Well also keep in mind, the front fender opening is located noticeably higher on the body than the rear too, so there should be a larger fender gap up front than in the rear like you have.

**72ironmike** · 04-06-2014, 08:28 PM

Quote:

Originally Posted by DANTIP

Thanks! The truck came with crappy-looking body color rally wheels and 12-year old dry cracked tires. I had the white steel wheels with fresh radials from a truck I recently sold. I love the vintage dog-dish caps! I also added my extreme-bend tow hooks. Runs great and the body/paint work is REALLY nice. I've owned many trucks but this is my first Blazer.

Dan

Dan, Looks very nice !

03-30-2014, 09:19 AM	#1
DANTIP Registered User Join Date: Sep 2001 Location: Fort Wayne, Indiana, USA Posts: 1,888	Rear spring sag?? I just purchased this Blazer and think the rear looks like it rides a little low. It does have HD front suspension. Thinking about replacing rear springs and/or adding supplemental air-springs. Any thoughts?? Dan Attached Images

03-30-2014, 10:56 AM	#2
mjjjracing Registered User Join Date: Jan 2013 Location: Rye Colorado Posts: 43	Re: Rear spring sag?? I think it sits just right , Most Blazers have that stance from the factory and even after you lift them . I would leave it alone myself . Just my 02 cents. Jim , By the way that is a very nice Blazer you have __________________ 39 GMC pickup,70 GMC K1500 short bed 4x4 ,72 K10 short bed step side 4x4 ,71 short bed fleet side , 72 K20 long bed ,74 K10 long bed , 69 C30 dump bed dually, 79 K30 standard cab dually , 02 Dodge 4x4 dually

03-30-2014, 11:38 AM	#3
SACRAMENTO 71 Registered User Join Date: Aug 2012 Location: Sacramento, CA Posts: 242	Re: Rear spring sag?? Great find! Love that original look and tone of blue. __________________ 68 C10 SWB W/ 72 FRONT CLIP 343SB TH400 64 C10 SWB 406SB TH400 74 SUBURBAN 454BB TH400 78 K10 SWB 350 TH350 6" ON 35" BFG MUD 71 K5 350 W/ TBI 700R4 6" ON 38" BFG MUD 00 K3500 DRW BIG BLOCK "DRINKING PRBLM"

04-03-2014, 12:15 AM	#5
Jdubs71 Registered User Join Date: May 2012 Location: Sanger, CA Posts: 415	Re: Rear spring sag?? You could add a leaf to the rear springs to level it out, but when/if you take the top off it might have the opposite affect. Adding a leaf would likely stiffen the ride. __________________ 71 K5, AC/Tilt, 4" lift 33" tires 5.3L/4L60E/NP 205 (Under Construction) 05 Dodge 2500 4x4 5.9 Cummins (Daily driver) "Common sense is not so common" My build thread http://67-72chevytrucks.com/vboard/s...d.php?t=555879

04-03-2014, 07:12 AM	#6
DANTIP Registered User Join Date: Sep 2001 Location: Fort Wayne, Indiana, USA Posts: 1,888	Re: Rear spring sag?? I bought an air spring system that will supplement the rear leaf springs. I hope to get it installed this weekend and I'll share my thoughts afterward. Dan

04-03-2014, 10:30 AM	#7
GCncsuHD Charlie Daniels w/ a Tq Wrench Join Date: May 2009 Location: Statesville, NC Posts: 1,570	Re: Rear spring sag?? Looks fantastic. Helper bags should help, but honestly, for almost 45 year old springs, I would have just replaced the springs. You'll have to play around with the pressures in the bags, most of the ones I've dealt with you only run single digit pressures when unloaded, otherwise the rear gets really stiff. That may or may not give you the height you want, but it may give you the adjustability you want between top on/off. I.E. 8lbs top on, 3lbs top off, 30lbs when hauling, etc. __________________ ΜΟΛΩΝ ΛΑΒΕ 67 C10 Shortbed "Great Grandpa's Truck" I6 3 on the Tree 71k original miles 5.3 swap in the works 69 K5 Blazer-Family Beach Cruiser Project 78 K30 Dually Semi-Retired Fire Truck 350/SM465 35"s SOLD01 2500HD ECSB 6.0 4x4 5.13's 8" lift 38"s

04-03-2014, 10:41 AM	#8
DANTIP Registered User Join Date: Sep 2001 Location: Fort Wayne, Indiana, USA Posts: 1,888	Re: Rear spring sag?? I pulled my 1972 Truck Data Book out and after looking at the drawing showing the Blazer dimensions, the stance on my Blazer looks about right. Notice the rear tire is further up into the wheel well compared to the front. Dan Attached Images



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