Testing old springs
 

My son bought a rebuilder 1971 chevy 1/2 ton short bed step side and is going to replace original rear springs with new. My question is how can a guy check the tension on the old springs to see if they are still usable as i have one sagging rear spring that I would like to replace with one of my son's take offs. I know I can replace with new but don't want to spend the money. TIA

Re: Testing old springs
 

Change them as a pair.
Jimmy

Re: Testing old springs
 

That sounds reasonable but want to make sure the stiffness of the springs are still at oem specs, that is why I wanted to know about spring stiffness testing and how to do it.

Re: Testing old springs
 

That's a spring shops job... they build and have machines and knowledge. Going out on a limb but 40 year old Springs are gonna be badd

Re: Testing old springs
 

Ever hang out at lowes or home depot no one ever overloads

Re: Testing old springs
 

That makes sense sounds like new is the way to go, thanks for your input. Do you know what these oem springs are rated at?

Re: Testing old springs
 

Here is some information on the spring rates.
Jimmy
http://67-72chevytrucks.com/vboard/s...t=spring+rates