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4x4 Jeep ZJ - Medina's Unibogger

A ZJ Built For the Occasion

writer: Jerrod Jones
photographer: Jerrod Jones


It's rare that we see anything unibody sitting on Boggers. Interco's Boggers are hardcore tires on any vehicle, but on a unibody that transfers vibration so easily...well, you'd have to be one dedicated wheeler to run that kind of combination. What started as a daily driver-getting the budget boost and then a lift-ended up being a time obsession as Tommy Medina went to town learning how to build his own wheeler from "stock to not" with the help of R&D Fabrication. In its current form, Tommy's vehicle runs a 1-ton axle combo, 16-inch coilovers, and big 38 1/2-inch Boggers at each corner. He's got all the mixin's for a badass 4x4, and in both Moab and Truckhaven, California, we've seen Tommy prove that he's got the skills to match his truck's build.

Tech Specs

Engine: 5.2L V-8, Mopar Performance ECU, Turbo City dual intake
Transmission: Factory four-speed automatic
Transfer Case: NP242 transfer case with Tom Woods slip-yoke eliminator
Front Axle: Fullsize Dana 60 eight-lug, 5.86 Yukon gears, ARB Air Locker, Tom Woods 1310 driveshaft
Rear Axle: Fullsize Dana 70 eight-lug, 5.86 Yukon gears, ARB Air Locker, Tom Woods 1310 driveshaft
Steering: PSC full hydraulic ram
Front Suspension: Four-link with upper triangulated links, 16-inch S.A.W. coilovers
Rear Suspension: Four-link with upper triangulated links, 16-inch S.A.W. coilovers
Tires & Wheels: 38 1/2-inch Interco Swamper Boggers on 16-inch Rockcrawler rims with Great Lakes Offroad bead locks


When we first met Tommy in Truckhaven, California, his ZJ was already on the trailer with some pretty good carnage: He had busted a control arm and wasted a coilover shaft at the same time. When we saw him again in Moab, he'd fixed everything and boxed in this central transfer case and control arm support frame into a reinforced belly skid. Now his NP242 sits tucked under 3/8-inch steel plate, and his ZJ has a better landing pad. Two-inch DOM lower control arms with 3/4-inch rod ends and 1 3/4-inch upper triangulated arms drop from the crossmember and reinforced unirails, holding a fullsize Dana 70 steady under the 16-inch stroke Sway-A-Way coilovers with a combo of Eibach and King coilovers. The D70 is packed with 5.86 Yukon gears and an ARB Air Locker.
When we first met Tommy in Truckhaven, California, his ZJ was already on the trailer with some pretty good carnage: He had busted a control arm and wasted a coilover shaft at the same time. When we saw him again in Moab, he'd fixed everything and boxed in this central transfer case and control arm support frame into a reinforced belly skid. Now his NP242 sits tucked under 3/8-inch steel plate, and his ZJ has a better landing pad. Two-inch DOM lower control arms with 3/4-inch rod ends and 1 3/4-inch upper triangulated arms drop from the crossmember and reinforced unirails, holding a fullsize Dana 70 steady under the 16-inch stroke Sway-A-Way coilovers with a combo of Eibach and King coilovers. The D70 is packed with 5.86 Yukon gears and an ARB Air Locker.
Tommy's front suspension is almost identical to the rear: a matching upper triangulated four-link hooks the Dana axle to the Jeep while it rides on S.A.W. coilovers. Normally you would never want to run a front triangulated four-link suspension because it would cause massive bumpsteer in your crossover steering system during suspension motion, but Tommy has switched to a PSC full-hydraulic steering-ram setup with no solid steering link between the ZJ and the axle, only fluid couplers. The full-hydro steering allows Tommy to turn the Dana 60 knuckles easily. Sitting inside the fullsize '60 is a 5.86 Yukon gearset and an ARB Air Locker to match the rear.
Tommy's front suspension is almost identical to the rear: a matching upper triangulated four-link hooks the Dana axle to the Jeep while it rides on S.A.W. coilovers. Normally you would never want to run a front triangulated four-link suspension because it would cause massive bumpsteer in your crossover steering system during suspension motion, but Tommy has switched to a PSC full-hydraulic steering-ram setup with no solid steering link between the ZJ and the axle, only fluid couplers. The full-hydro steering allows Tommy to turn the Dana 60 knuckles easily. Sitting inside the fullsize '60 is a 5.86 Yukon gearset and an ARB Air Locker to match the rear.
When it's time to go wheeling, Tommy just yanks his doors to save 'em for a rainy day. Inside the ZJ is 1 3/4-inch DOM tubing that Tommy built with the help of R&D Fabrication in Temecula, California. Outside, Tommy has protected the body with Trailready bumpers and Off-Road General Store Supernerf sliders. To make sure the Jeep doesn't spill its fuel, a Trailready fuel-tank skid was implemented underneath.
When it's time to go wheeling, Tommy just yanks his doors to save 'em for a rainy day. Inside the ZJ is 1 3/4-inch DOM tubing that Tommy built with the help of R&D Fabrication in Temecula, California. Outside, Tommy has protected the body with Trailready bumpers and Off-Road General Store Supernerf sliders. To make sure the Jeep doesn't spill its fuel, a Trailready fuel-tank skid was implemented underneath.

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