Let's talk suspension springs

[coldair]

I have a set of 4 inch lift springs on my 86 CJ7 . I'm trying to figure out what they are and if they are a good spring. They have the nylon pads to cut down on friction but they are really stiff so far they only have 100 or so miles on them is what I was told from the PO. I will have picture up later tonight.

 

[73CJ]

OME used yellow pads between the springs.

The main concern is the spring rate. How many pounds to depress the spring 1". Most cj springs are around 200-265 #/". A couple of ways to measure. If the spring is off the truck, flip it upside down measure the height of the arch. Have a 200-250 buddy stand on it and remeasure. Pounds/ inch deflection

If on the vehicle, use a jack and bathroom scale. Measure then jack it one inch. Read the scale.

I had a 4" trailMaster lift. When I sold it I found out the spring rate was 550#/". It rode like a tank No wonder I cracked my frame at 3 spring perches. OME is about 230 and the axles actually go up and down now. TrailMaster would not even honor their "lifetime" warranty on the shocks. I even had the receipt.

 

[coldair]

I'm not sure what color they are they have paint over them might have to scratch that off.

 

[coldair]

Wasn't able to put pictures on last night but I did find out what brand my springs are. Pulled the U bolts off one side there was a skyjacker sticker on them. Who is running a skyjacker lift kit?

 

[coldair]

OME used yellow pads between the springs.*

The main concern is the spring rate. *How many pounds to depress the spring 1". Most cj springs are around 200-265 #/". A couple of ways to measure. *If the spring is off the truck, flip it upside down measure the height of the arch. *Have a 200-250 buddy stand on it and remeasure. * Pounds/ inch deflection *

If on the vehicle, use a jack and bathroom scale. *Measure then jack it one inch. *Read the scale.

I had a 4" trailMaster lift. * When I sold it I found out the spring rate was 550#/". * It rode like a tank *No wonder I cracked my frame at 3 spring perches. *OME is about 230 and the axles actually go up and down now. TrailMaster would not even honor their "lifetime" warranty on the shocks. *I even had the receipt.

Called skyjacker they said the 4 inch lift is 260 in the front and 240 in the rear.