The Dynatrac Dana 60 front...
The Dynatrac Dana 60 front axle is stronger than the factory independent front suspension and allows the use of more robust steering components as well. Jack Stanko has built lifted IFS Chevys in the past and found they were not strong enough to endure the punishment he subjected them to.
Jack Stanko believes that General Motors makes the best diesel truck available. Many people agree with him, thanks to class-leading power, a stout Allison six-speed automatic transmission, and arguably the nicest interior available in a 3/4- or 1-ton truck. The GMs do have an Achilles' heel, however-the dreaded independent front suspension. Sure, it's great if you want to drive your truck to church on Sundays or toss the keys to granny so she can take your oil-burner to the store for some sugar, but it's not nearly as beefy as the Dana 60 solid front axle offered under the front of new Fords and Dodges.
The ring gear on the Dana 60 is a 1/2-inch larger than the IFS frontend, and the U-joints on the solid axle only have to account for turning, while the CV joints in the IFS must accommodate up and down motion of the suspension in addition to left and right turning motion. The steering on the solid front axle is much stronger than the IFS as well, using larger, thicker tubing for the steering links and larger tie-rod ends. By now, it should be easy to see where this is going.
The front shackle is mounted...
The front shackle is mounted inboard of the frame. The narrower spring perch width keeps the tires from rubbing the springs at full steering lock.
Jack was tired of breaking the IFS frontends under his past Chevy trucks, so he ordered up a solid axle conversion kit from Off Road Unlimited for his '06 Duramax-equipped 2500 crew cab shortbed. The IFS was then removed by Jack and his friend, Nate Jensen. New leaf spring and shock hangers were hung to hold Atlas leaf springs and dual Bilstein 7100 series remote reservoir shocks. The rear was similarly raised with Atlas springs and Bilstein shocks. The new suspension provided about 8 inches of lift, which made plenty of room for 37x13.5R20 Toyo Open Country M/Ts mounted on 20x10 Weld Velociti rims.
Steering duties for the big meats are handled by an Off Road Unlimited hydraulic ram that is plumbed to an Off Road Unlimited stock steering box. The tie rod and drag link from Off Road Unlimited also connect the steering box to the front Dana 60. The Dana 60 axle was sourced from Dynatrac and built to ORU's specifications to match the rear axle and driver-side drop of the factory transfer case. The front axle was stuffed with 4.56 gears and an ARB Air Locker, while the AAM 11 1/2-inch 14-bolt rear received matching gears. When the suspension articulation and locker aren't enough on the trail, Stanko can rely on his Warn 16.5ti winch mounted on the front TrailReady bumper.
Other than the suspension modifications, the truck is relatively stock. Behind the Duramax, the stock six-speed Allison automatic routes power to the factory electronically shifted NVG263 transfer case. The only necessary change was a new long-travel front driveshaft from Reno Driveline Service and Gear to mate to the solid front axle. A custom 4-inch exhaust from Mr. Z's in Reno, Nevada, is the only modification that was done to the LBZ engine. As we noted above, the Chevy is not lacking in the power department. With 650 lb-ft of torque from the factory, the only thing the Chevy gives up to Ford and Dodge is the front axle, and Jack Stanko has that little problem solved.
 Dual Bilstein 7100 remote...  Dual Bilstein 7100 remote reservoir shocks are mounted on Off Road Unlimited shock hoops and greatly contribute to the ride quality of the leaf-spring suspension. |  The rolling stock consists...  The rolling stock consists of 37-inch Toyo Open Country M/Ts wrapped around 20x10 Weld Velociti rims. The tires are E-load range rated, and the wheels are forged so towing capacity is not sacrificed with this combination. |  The TrailReady bumper was...  The TrailReady bumper was color matched to the truck and filled with a Warn 16.5ti winch and PIAA lights. The bumper matches the factory lines quite nicely but is stronger than the stock bumper. The front spring hanger mounts in the same location as the new bumper, so Jack had to modify the mounts to fit both components without sacrificing strength. |
 Hiding under all that plastic...  Hiding under all that plastic is an LBZ Duramax engine. Also visible is the ARB air compressor that activates the front air locker. |  The interior is largely stock,...  The interior is largely stock, which, in this case, is a good thing. The leather seating and steering wheel controls are more akin to a luxury car than a work truck, but the Husky floor liners remind you that this is still a pickup. |  From the rear, the Duramax...  From the rear, the Duramax is all business. The exhaust exiting the huge polished tip is exceptionally quiet and free of soot. Black smoke may impress other diesel owners, but it doesn't win over the general public. |
 Atlas leaf springs are coupled...  Atlas leaf springs are coupled with Bilstein 7100 series shocks in the rear. No lift blocks were used in order to limit axlewrap from the torquey diesel mill. The AAM 1150 rear axle was also upgraded with ORU's aluminum differential cover to keep the gear lube cool while towing. |  Unlike some trucks that are...  Unlike some trucks that are lifted to the sky and become impractical, Jack's Duramax is well-proportioned and provides a good balance between daily driving, towing, and trail prowess. |  This shot is a testament to...  This shot is a testament to the rigidity of GM frames. Even with the axles crossed up, the suspension is doing all of the work and the bed and cab are still aligned. |