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1996 Jeep Grand Cherokee Suspension - Project Ain't It Grander

Front View
Willie Worthy | Writer
Posted February 1, 2008

Part 3: Suspension

As we mentioned last month, we had decided to go with the folks at T&T Customs for the suspension on the Grand because we had seen some of their work and were impressed. Bob Levenhagen, the chief designer, wanted us to come to their Cheyenne, Wyoming, shop and let them do the installation. But we finally decided that Bob would drive over here (Montana) with the parts and pieces and do the install at our shop. This made it a lot easier on us not having to haul a whole bunch of stuff to Wyoming, such as the front and rear ends and tires and wheels.

When he arrived, we had the Grand Cherokee stripped of all running gear and up on end lift jacks. While it made welding on some of the brackets a bit more difficult than being on a lift, the arms of the lift would have interfered with installing the chassis stiffeners. Just what are chassis stiffeners? As we all know, the ZJ uses what is called unibody construction where the framerails, often referred to as a "subframe," are part of the body and made of stamped and formed sheetmetal. This all works out just fine for highway use, and most off-highway use, but when you get into some serious four-wheeling, well, the body kind of flexes. This leads to cracks around the door pillars and other places that are not desirable. The chassis stiffeners greatly improve or, should we say, prevent this body movement.

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Bob's first order of attack was to clean off the subframe rails of all the undercoating and paint-a very nasty job-and to torch off the factory suspension mounts. These don't have to be removed if you're only using the chassis stiffeners with most short-arm lift kits, but they must be removed for the T&T long-arm suspension kit. The chassis stiffeners are best described as a long piece of angle-bent steel with notches cut in the vertical sides to allow conformation to the unibody's subframe. They are held up against the subframe with the bolted-on factory crossmember and then bent into the proper position with a floor- or bottle jack before being welded in place. Keep in mind, you're welding 3/16-inch (7-gauge) metal of the chassis stiffeners to about 1/16-inch (14- to 16- gauge) unibody metal. Let me stress right now that your welding skills better be up to the job, as it is quite difficult. If there is any doubt to your skills, stop now and have a professional welder do the work for you; if it is done improperly, irreparable damage can be done. Bob turned out some of the nicest welds I have ever seen.

Next step was to start on the mounting locations for the control arms. I won't go into any real detail here, as you will see as you read on. The control arms are over twice the length of the original factory stamped arms and made of DOM steel with the uppers being 1.50 inches in diameter and a full 1/4-inch thick, with the lowers being 1.75 inches in diameter and 1/4-inch thick. The axle mounting end has high-density rubber bushings to absorb vibrations, and the frame-mounted end uses a custom high-angularity swivel joint that will provide 60 degrees of total movement and is adjustable for wear, as well as being rebuildable.

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Sources

Rancho Suspension
Monroe, MI 48161
734-384-7804
www.gorancho.com
K&N Engineering
Riverside, CA 92507
800-858-3333
www.knfilters.com
Bilstein
Poway, CA 92064
858-386-5900
http://www.bilsteinus.com
JKS Manufacturing
Alliance, NE 69301
308-762-6949
www.jksmfg.com
Quadratec
West Chester, PA 19380
800-745-2348
www.quadratec.com
Motive Gear
Chicago, IL 60609
800-934-2727
www.motivegear.com
EnerSys
Reading, PA 19605
610-208-1991
Superior Axle
N/A, AK
888-747-2953
www.superioraxle.com
PSC Motorsports
Azle, TX 76020
817-270-0102
www.pscmotorsports.com
Alloy USA
Suwanee, GA 30024
800-449-6649
www.alloyusa.com
Rusty's Off Road
256-442-0607
Olympic 4x4 Products
City of Commerce, CA 90040
323-726-6988
ARB USA
Renton, WA 98057
866-293-9078
Superlift
superlift.com
Powertank
209.366.2163
Eaton/Detroit Locker
www.eatonperformance.com
J.E. Reel Drive Line Specialists
www.reeldriveline.com
Gen-Right Off Road
805-584-8635
genright.com
Tomken
Buena Vista, CO 81211
Mickey Thompson Performance Tires & Wheels
Corona, CA 92881
www.mickeythompsontires.com
Stainless Steel Brakes
Clarence, NY
800-448-7722
ssbrakes.com
Crown Automotive
781-826-6200
www.crownautoparts.com
MasterCraft Racing Products
www.mastercraftseats.com
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