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Jeep Tech: Suspension

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Upgrades

Suspension Tricks

MORE Shackle Reversal & Buggy Spring : David Gray does a review and install of the MORE Shackle Reversal & Buggy Spring for his YJ.
Spring & Shackle Reversal: A shackle reversal on a set of semi-custom flexy springs 3.5" lift springs for Project Jeep Therapy.
Flip Your U-Bolts: Are you tired yet of dragging, bending, and breaking your axle u-bolts on rocks? Well flip your u-bolts to gain ground clearance and protect them from damge.
3/4 Elliptical Suspension: Craig Meyer's 3/4 elliptical suspension is surprisingly simple and elegant. The tools to build it can be found in most garages and the parts won't cost an arm and a leg.
3/4 Elliptical Suspension : Some of us go to great lengths to increase the amount of flex and articulation from our 4x4s. A 3/4-elliptic suspension is a simple, yet effective modification that allows more wheel travel and articulation, without requiring a second mortgage on your house.
Big Tire, Little Lift: The best set up for your Jeep is to use the least amount of lift possible to fit your target tire size. Here's how to optimize.
Wrangler YJ Travel Trick: This simple trick can increase the travel of your Jeep Wrangler's rear axle.
The $2 Trackbar Disconnect System: Make a quick disconnect for your Wrangler YJ trackbar for only $2.
Shock Selection : Toyota editor Chris Geiger with some helpful hints on Rancho shock selection. When we modify our suspension it is often necessary to replace the shocks with a longer unit and most parts guys have no idea what you need and end up guessing.
Shackle Lifts and Polyurethane Bushing: Our Isuzu editor does a shackle lift and polyurethane bushing install, the same principles apply to most Jeeps.

Lift Kit Installations

TJRubicon Express 4.5 in. TJ Lift : While my TJ was on order I had the time to research lift kits and decide which would fit my needs the best. There is a lot of information out there about the various lifts available, so it comes down to personal needs. I knew I wanted 4 inches or more, so that left just a few choices.
Pieces and Parts Suspension: Since this project is called "Pieces and Parts", you can't expect anything to be normal and this is true for the suspension. The suspension is not radical, but it is practical and should perform well.
Tomken 5-6 in. XJ Lift Kit: I installed the kit on my 85 XJ as a test platform with an attitude that the new system needed to live up to my standard of always adding stronger parts than were removed.
Off Road General Store 4.5" Lift for the Jeep Grand Cherokee: Tony Curless gives us the low down on a high riding Grand Cherokee.
Old Man Emu Suspension Upgrade for the Jeep Grand Cherokee: Even with the Up-Country suspension package the vehicle seemed prone to excessive body roll and I set out to solve that. Old Man Emu was the answer to the suspension upgrade that I required.
ZJ Rubicon Express 4.5" Lift: The market is recently being flooded with Grand Cherokee suspension kits. Some of these kits just give you some extra height while others are designed for extreme performance. The Rubicon Express 4.5" suspension kit is one of those extreme performers, but at a cost.
Pro Comp Suspension: A review of the 3" Pro Comp ZJ lift.
Grand Cherokee Suspension Guide: A Complete Listing of All Suspension Systems fot the Jeep ZJ.

Installing a Spring Over Lift Kit

SOA YJWrangler Axle Swap and SOA : Chris Waterman tells us how he swapped an early Bronco Ford 9" and Dana 44 into his Wrangler YJ. The transformation was enhanced with a spring over axle lift at the same time.
44ed YJScout Dana 44s under a YJ: When evaluated as a hard-core off-road vehicle, the Jeep YJ is often praised for its excellent fuel-injected motor and panned for its weak axles and low, limited-articulation suspension. This is nothing a spring over with Scout Dana 44s won't cure.
CJ Spring Over Axle : John Nutter explains how he did a spring over axle lift on his CJ using YJ springs. His Jeep now easily ramps over 1000 and he saved cash for other upgrades.
Rubicon Express Spring Over Axle Kit: Larry Soo reviews the Rubicon Express Spring Over Axle Lift Kit for Jeep Wranglers YJs.

Spring Over vs. Spring Under

Spring vs. Body Lifts

Reviews

Review of Tomken's Wrangler TJ Lift: Don Alderrou reviews the Tomken Wrangler TJ Lift Kit. His in depth installation instructions explain how to get your TJ to ramp over 1000.
JKS Bar Pin Eliminators: Stop the Thump! Get some pre-load.. How 'bout a stronger shock mount?
Review: Rubicon Express 4.5" Cherokee Lift
JB Conversions: Precision Machined Body Lift Kit.

Factory Options

Suspension Essentials

Steering and Suspension Terminology: Suzuki editor Larry Harris discusses steering and suspension terminalogy. Excellent descriptions and diagrams.

Functions of the Suspension

Leaf Spring Jeeps

Full, 3/4, 1/2, and 1/4 Eliptical

All the Jeeps that have been produced with leaf springs, have used 1/2 eliptical springs. There is one arc attached at either end. Lately there has been a trend to use 1/4 and 3/4 eliptical springs on Jeeps to get more articulation. On 1/4 eliptical springs, there is 1/4 of an arc attached at one point on the frame and on the other on the axle tube. The 3/4 eliptical suspension attaches to the frame at one point, to the axle tube, to a shackle that attaches to another 1/4 arc that attaches to the frame.

 

Full eliptical spring on a horse drawn carriageFull eliptical spring on a horse drawn carriage.

Shackle Reversal

 

Shackle reversalPros and Cons of Shackle Reversal : Shackle reversal is one of the most misunderstood Jeep suspension modifications. The pros and cons of shackle reversal should be understood before you spend your hard earned money on a kit.

Coil Spring Jeeps

Articulation & RTI

Solid Axle vs. IFS

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