Originally Posted by FanAholic
I have heard, and read that the axles will be "better" then before. How do the axles on the 2007 compare to the axles now? What about the front 44 on the rubi, will it be better then the one they have now? Any specs. on spline count and diameter?
From the Jeep release documentation:
"The highly capable underpinnings of Jeep Wrangler Unlimited X and Sahara models include an enhanced Dana 30 front axle and Dana 44 rear axle – each featuring larger pinion shafts, pinion bearings and axle joints for increased durability compared to its predecessor. Engineered to take on the most demanding trails, the all-new 2007 Jeep Wrangler Unlimited Rubicon model features enhanced heavy-duty Dana 44 front and rear axles, which also feature larger pinion shafts, pinion bearings and axle joints."
From 2007 Jeep Wrangler Chief Engineer Jim Issner :
"The Dana 30 front axles have a high pinion design (TJ was a low pinion design) to provide greater gear strength, the housing is stiffer and stronger, and the pinion bearings are larger for improved durability.The Dana 35 rear axle also has a larger pinion and unitized wheel bearings. The prior design had an on-shaft bearing. The axle shafts have also increased in cross section for improved strength. Overall, the axles have been improved over its predecessor. In fact, we are considering different names for the axles since they are virtually all new. "
About the T-case design he said:
"The T case is stiffer and the main case joint is clamped by 18 fasteners instead of 9 previously. The t case consists of three pieces instead of five to reduce the potential for leakage. "
I also saw the engineers wanted to rename the Dana44's Dana45's because they were so much improved, I also saw the specifics on sline counts etc, but I can't find a source for those right now. I'll track 'em down and post when I can.