Front leaf spring question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cobinder · 11-05-2006, 08:37 PM

Help, I don't want to go backwards.
My 80 GMC 3/4 ton came with springs that are 2- 1/2" wide at the ends, then widens right away to just shy of 3", and have 3 leafs.

I picked up a used set that have 4" lift (only 2 leafs) but are only 2 -1/2" wide the full length.

Was told they are aftermarket for blasers, 1/2 and 3/4 tons?

My perch's are 2- 3/4" wide and my u-bolts are set up for 3".

Should I use'um? Will they be too soft? Will they stay positioned in the u-bolts properly?

Help!!!
In colorado

**kwmech** · 11-06-2006, 10:16 PM

I don't know of any aftermarket springs that only have 2 leafs

Senator350 · 11-07-2006, 12:04 AM

do NOT reuse your old u-bolts... bad idea
don't worry about the width.
try to find out what springs they are, cuz i'd question them only having 2 leafs.

Billy81 · 11-07-2006, 01:23 AM

Quote:

Originally Posted by kwmech

I don't know of any aftermarket springs that only have 2 leafs

I would have to agree since my blazers suspension is stock and the front springs only have 2 leafs. So they probably would not work to well for your 3/4 ton.

**Canadian694x4** · 11-07-2006, 02:34 AM

67-72 leaf springs are narrower is it possible that's what these are? I wish I had my truck here with me cause I'd measure my springs for ya to be sure.

Pretty sure 73 and up leaf springs are wider than 2- 1/2". That's why I wasn't able to use 'em on my '69 when I changed out the sagging stock springs.

jacobs · 11-10-2006, 08:09 PM

Quote:

Originally Posted by Canadian694x4

67-72 leaf springs are narrower is it possible that's what these are? I wish I had my truck here with me cause I'd measure my springs for ya to be sure.

Pretty sure 73 and up leaf springs are wider than 2- 1/2". That's why I wasn't able to use 'em on my '69 when I changed out the sagging stock springs.

The 73 front springs I used on my 70 are 3" wide and if I remember correctly, 73's are longer that 67-72's.

11-05-2006, 08:37 PM	#1
cobinder Everything is work in progress Join Date: Apr 2006 Location: Denver Colorado Posts: 326	Front leaf spring question Help, I don't want to go backwards. My 80 GMC 3/4 ton came with springs that are 2- 1/2" wide at the ends, then widens right away to just shy of 3", and have 3 leafs. I picked up a used set that have 4" lift (only 2 leafs) but are only 2 -1/2" wide the full length. Was told they are aftermarket for blasers, 1/2 and 3/4 tons? My perch's are 2- 3/4" wide and my u-bolts are set up for 3". Should I use'um? Will they be too soft? Will they stay positioned in the u-bolts properly? Help!!! In colorado

11-06-2006, 10:16 PM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,649	Re: Front leaf spring question I don't know of any aftermarket springs that only have 2 leafs

11-07-2006, 12:04 AM	#3
Senator350 Registered User Join Date: Feb 2004 Location: Albany, NY Posts: 522	Re: Front leaf spring question do NOT reuse your old u-bolts... bad idea don't worry about the width. try to find out what springs they are, cuz i'd question them only having 2 leafs. __________________ RN U OVR

11-07-2006, 02:34 AM	#5
Canadian694x4 Born To Lose Club Join Date: Feb 2003 Location: Calgary, Alberta/Oxenden, Ontario, Great White North Posts: 13,307	Re: Front leaf spring question 67-72 leaf springs are narrower is it possible that's what these are? I wish I had my truck here with me cause I'd measure my springs for ya to be sure. Pretty sure 73 and up leaf springs are wider than 2- 1/2". That's why I wasn't able to use 'em on my '69 when I changed out the sagging stock springs. __________________ Brian Smith - "Born To Lose" 1969 Chevrolet K10 LWB Fleetside - Proud Owner For 22 Yrs - 1 of 208 Built & Sold In Canada!- 283 V8/350TH/NP208, 2" All Spring Lift, 32" Good Year MT/R's. 1972 GMC K2500 Custom LWB Fleetside - Proud Owner For 3 Yrs - 1 of 571 Built & Sold In Canada! - 350 V8/SM465/NP205, 4” Rough Country Lift, 33” Interco TSL Thornbirds 2007.5 GMC Sierra SLE 2500HD 4x4 - Proud Owner For 17 Yrs- 6.6L V8 Duramax Diesel/Allison 1000, 2" Lift, 33" Mickey Thompson MTZ's. 2008 Yamaha Raptor 700r - Proud Owner For 15 Yrs - ITP Mud Lites. 2015 John Deere 1025R - Proud Owner For 8 Yrs - 24HP Diesel/H120/54D/260B/SB1154.



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