Sounds like the fix is firmer shocks and shorter bump stops. Folks in this forum were right all along lol. Clearly Jeep's engineers didn't fully tested the diesel before mass produce.
It's normal to have some in and out axle play (approx. 1 mm). The bearing race/cup isn't pressed fits, can easily spin with just one finger. In short, it's a non preloaded bearing design.
Imo. It's very important to tights the retainer plate bolts evenly when installing the axle. Even with the...
I think it's all come down to driving styles. Some prefer to drive it like an SUV off the line and others might just taking it easy off the line. For me, i knew right away, within a couple miles that i needed to regear. I lost 2.5 mpg with the 37s and gained .5 mpg back after regeared.
Before you throw more money at it. Have DT tried static balance? I also has the Borah wheels, but with 37s tires. Dynamic balance gave me a nearly 12" strip of weights on all four wheels and vibrates badly anything above 50mph. With static balance performed, it's back to driving with two fingers...
I didn't read through the thread, but mine 37s were shimmering until DT performed a static balance. I think the big tires are throwing off the Dynamic balancing.
Unless we can compares two exact same motors ( very unlikely). Run it for 100k miles, using different oils and then tears it down to inspects cam journals, crank thrust bearings, bores etc. It's hard to determine that if the more expensive oils are actually worth it. Having the correct type...
At one point, it was on sale for just $15 for a jug. I've used this oil since new. Skipped all Jeep wave free oil changes, caused i like my engine bay free of oil spills :)
Mine appears to uses more def after the update. It used to be 1500 miles per 1.25 gal of def. But now after the 2100 miles road trip, it's used little over 2 gal. That's 1,050 miles per 1 gallon.