81 4wd blazer, suspension upgrade questions. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

halffast blazer · 09-16-2005, 08:05 PM

i have an 81 blazer. i'm putting 3/4 ton suspension under it, and i want to raise it 2" or 3", nothing to extreme. does anyone offer these lifts with springs for the rear or is it just blocks? will the 3/4 ton springs raise it any? thanks alot

**JIMs70GMC** · 09-16-2005, 09:11 PM

your blazer has 52" rear springs, some 3/4ton trucks have 56" rear springs so they will not work. If you do have 52" rear 3/4 ton springs you probably won't see much lift except that from the number of leafs in the spring pack. Several manufacturers sell rear lift springs, i have 4" tuff country 52" rears on my GMC. For your year tuff country sells 2,3,4 & 6" rear springs.

halffast blazer · 09-17-2005, 05:56 PM

thanks for the info. i am very new to 4WD stuff, i am usually lowering vehicles. i guess i had better measure the springs. if they are 56" can i move the mounts or anything? also will there be any difference between front springs? also when ordering a lift kit, should i order one for 1/2 ton blazer or 3/4 ton truck?

**JIMs70GMC** · 09-17-2005, 09:06 PM

no difference except the rear springs. The fronts are the same73-91 1/2 ton and 3/4 ton.

halffast blazer · 09-18-2005, 06:49 PM

okay, i measured the springs and they are 52"

so they will work on my blazer. and now more "stupid" questions. as far as lift kits go, is there a difference between the 1/2 ton and 3/4 ton? as far as spring rates and such. if i order the kit with blocks for the rear will it affect the ride, having new springs in the front and old springs in the rear? are blocks really a good way to lift it? i really want springs all the way around, but the price for rear blocks is attractive. so any advice would be welcome. thanks

09-16-2005, 08:05 PM	#1
halffast blazer Registered User Join Date: Mar 2005 Location: Texarkana, TX Posts: 65	81 4wd blazer, suspension upgrade questions. i have an 81 blazer. i'm putting 3/4 ton suspension under it, and i want to raise it 2" or 3", nothing to extreme. does anyone offer these lifts with springs for the rear or is it just blocks? will the 3/4 ton springs raise it any? thanks alot Last edited by halffast blazer; 09-17-2005 at 05:57 PM.

09-16-2005, 09:11 PM	#2
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	your blazer has 52" rear springs, some 3/4ton trucks have 56" rear springs so they will not work. If you do have 52" rear 3/4 ton springs you probably won't see much lift except that from the number of leafs in the spring pack. Several manufacturers sell rear lift springs, i have 4" tuff country 52" rears on my GMC. For your year tuff country sells 2,3,4 & 6" rear springs. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm Last edited by JIMs70GMC; 09-16-2005 at 09:12 PM.

09-17-2005, 05:56 PM	#3
halffast blazer Registered User Join Date: Mar 2005 Location: Texarkana, TX Posts: 65	thanks for the info. i am very new to 4WD stuff, i am usually lowering vehicles. i guess i had better measure the springs. if they are 56" can i move the mounts or anything? also will there be any difference between front springs? also when ordering a lift kit, should i order one for 1/2 ton blazer or 3/4 ton truck? Last edited by halffast blazer; 09-17-2005 at 10:14 PM.

09-17-2005, 09:06 PM	#4
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	no difference except the rear springs. The fronts are the same73-91 1/2 ton and 3/4 ton. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

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09-18-2005, 06:49 PM	#5
halffast blazer Registered User Join Date: Mar 2005 Location: Texarkana, TX Posts: 65	okay, i measured the springs and they are 52" so they will work on my blazer. and now more "stupid" questions. as far as lift kits go, is there a difference between the 1/2 ton and 3/4 ton? as far as spring rates and such. if i order the kit with blocks for the rear will it affect the ride, having new springs in the front and old springs in the rear? are blocks really a good way to lift it? i really want springs all the way around, but the price for rear blocks is attractive. so any advice would be welcome. thanks



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