1986 Toyota 4Runner Gets the Zuk Mod
Set of Jeep coil springs helps to improve the ride and stability of this early Toyota 4Runner.
While looking around YotaTech‘s Tech Write-Ups section, we came across a thread by “Surf Runner” where he details his process of performing the “Zuk Mod” to his 1986 Toyota 4Runner. This relatively simple upgrade will help to support the factory leaf springs and as this simple review of the project shows, you don’t need a world of mechanical experience to add this upgrade to your vehicle.
When the OP first introduced his write-up, he explained why he decided to perform this upgrade to his 1986 4Runner. He also includes some pictures of his suspension setup prior to adding the coil springs, and while this isn’t exactly a step-by-step do-it-yourself piece, just about everything that you need to do this in your garage is included.
After being a fan of the site for quite some time and reading others successful stories, decided to do a Zuk Mod on my 86 4runner SR5. When i bought my truck it had 3″ blocks in the back and the torsion bars cranked up to fit 35’s under it. I previously added the ball joint spacers so I could smooth out the ride up front, but because of the off the blocks i was still breaking u-joints and had a low weight capacity for towing and payload.
Next, the OP explained what he used for this upgrade, using a set of Jeep Rubicon springs that had been heated and bent to tuck into place on the stock Toyota suspension setup. He ended the write-up with a review, raving about the outcome and the improvement with this simple upgrade.
I recommend the Zuk mod for any older Toyota and especially the 4runners. after putting about 5k on it since this mod I can say my horrible body roll and constant fear of flipping while turning is gone. the Zuk mod stiffened up my rear end so much I can load my truck with tools and have 4 guys stand on my bumper and it barely drops with all the weight
Click here for a closer look at this thread, including more pictures and details on performing this upgrade to your Toyota 4Runner.