Anyone with 4" Skyjackers?

[JVanvuren]

Hey all,



I'm trying to decide between the 2. 5" and 4" Skyjacker front springs. After an exhausting search of the archives, I've learned that with the 2. 5" springs I can expect anywhere from 3 to 3. 75" between my springs and bumpstops up front.



Anyone with a 4" Skyjacker setup willing to measure this distance for me? From the bottom of the rubber bumpstop to the top of the leaf spring pack.



Thanks in advance for your help!!



John

 

[BCook1]

Don't know but...

I have the 2. 5 inch skyjacker leafs in the front of my 92. After initial sag they have about 3 inches between the leafs and bumpstops. I didn't know that skyjacker made a 4" spring for cummins trucks. I was told they did not by the person I bought my suspension from. 2. 5s up front and 6 inch minus factory blocks will give you an even/level truck after the sag in time. This will put your truck about 1 to 2 inches higher than stock and allow the tires I have (see below) to fit without rubbing. To go higher in front will probably require special springs that will not ride as well.

As a reference, I put 6 inch softrides in the back of my 82 (small block), kept the 4 inch blocks and put six inch front skyjackers in. It sat level for about a year until it sagged down about 1 and 1/2 inches. I corrected this with custom made shackles. Several problems arose with this set up. One, the six inch front springs have a significant positive arc and consequently become longer than the max length of the stock springs when compressed. I ended up with a very unpleasant spring bind situation during compression which literally tossed the truck sideways on rebound. This is because the spring hits the frame before it passes through its level point and wraps up. Then it releases with great force. I could tell because there was a spot rubbed in the frame above the shackles where it hit. This problem was also corrected by the custom longer shackles. The rear was equally troublesome. The spring wrap was so bad that it would shake the truck violently - so violently that I had to start out in granny gear all the time. Kicker shocks were absolutely worthless - they did nothing even with custom brackets. The only thing that stopped the axle wrap was a custom made set of adjustable four link bars that I had to design and build myself. After that, 95% of the wrap was gone.

Hope that helps.