Péwé's Pile quickly grew from a derelict '76 CJ-7 to a rip-roaring, aluminum-bodied trail killer we've christened the CJ-17 for its plethora of rivets and Boeing B-17 bomber styling. The Jeep had to lead our squadron of 4x4s on the annual Ultimate Adventure (read about it on page 24), so we had to stuff some hearty parts underneath.
We've already discussed the Erod GM Performance Parts LS3 crate engine ("Erod Action," Sept. '10), which is smog compliant to swap into just about any 4x4. We also told you about the suspension (Oct. '10), and the Aqualu aluminum tub we bolted onto the original frame (Nov. '10). This month we'll take you to Dynatrac, where we built a set of axles capable of spinning 37-inch Goodyear tires with ease.
Ultimate Adventure Sponsors
Presenter and official tires
Hi-Lift Jack Co.
Warn Industries Inc.
BDS Suspension Co.
Official body armor
Official recovery rope
Official polyurethane products
We decided early on that we wanted a Dana 44-sized front axle and a Dana 60 rear, so we he
Once the mount locations were determined we returned to Dynatrac, where they began assembl
Our front axle is a hybrid ProRock 44 with Dana 60-sized axleshafts and steering knuckles.
The Dynatrac 35-spline axleshafts are made of chromoly for plenty of strength, and CTM U-j
Our rear axle is a high-pinion ProRock 60 stuffed with 5.13 gears and another ARB Air Lock
The Dynatrac crew is meticulous when assembling these axles. For example, great care is ta
Dynatrac also does a thorough job welding the axletubes and suspension link mounts. Dynatr
For simplicity and strength we went with a full-floating rear axle setup. First, spindles
Along with the spindles, brake caliper mounts are welded to the housing. Dynatrac has begu
On the front axle we used Dynatrac's Dana 60 knuckles, but to ensure years of trouble-free
The goal of Ultimate Adventure is building a street-drivable yet trail-tough 4x4, and that
Our axles ended up being 67 inches wide from wheel mount surface to wheel mount surface, s