Dam Sam....typical Genuine gear! Just joking. The rear V6 Genuine gears exploded making a terrible noise...Sam was 40 miles from home and said, "screw it!", and drove all the way home at 20 mph with the rear end making shotgun noises and occasional lock-ups. He did make it and the above pic shows the old Genuine pinion took some abuse. The plan---to salvage this V6 carrier/case with Lockrite and rebuild it with a new Genuine 529 gear that Sam had on hand. This carrier would then be swapped into the front end. In turn, the rear would see a V6 carrier with spool with Bobby Long "cryo only" treated Yukon gears. No pics of the new rear install unfortunately. This is the part number for the BIG V6 pinion bearing.... part number for the V6 carrier bearings Comparison of the V6 pinion bearing on the left with the "4 cylinder" on right. Genuine gear...all the markings to be found on the gears to help ID them. Cleaned area well and placed .120" worth of shims BEHIND the big bearing cup. This means I need to only put about .123" of shims at the pinion head as .243" is approximately the total pinion shim required when installing "4 cylinder" gears in a V6 3rd member. Editor's note: I don't do this anymore. There is no strength benefit to placing less shims behind the pinion. It only adds more math to the install. ZUK 1-26-2007 Shim used here was about .121"....the bearing was in good shape and was re-used. I should have bought a lottery ticket as the pattern was as good as can be expected. Total shim is about .241" for this install. Sam! Only 70 ft/lbs. please! We cranked the carrier bearings TIGHT to minimize ring gear deflection and maximize life....about 8 on the backlash....and about 6 in/lb on pinion pre-load. The pinion nut was loctited and staked. The V6 crush sleeve seemed to take almost twice the effort to crush as the longer 4 cylinder one which is good.HOME
Let's see if Sam can break this one. ;) UPDATE on breakage.... 11-05-2006....Sam twisted the front axle splines and grenaded the birf on the driver's side 30 spline Long's.....529 front Genuine gears survived. He did this at the Marathon sponsored by the azundertakers. This happened on Axle Alley before the first waterfall in Florence, AZ. 1-13-2007....Sam shatters the front passenger side 30 spline Long cage on Ash Canyon Trail in Sierra Vista, AZ. The 529 was untouched. He did this in a section called Boulder Garden....it used to be called the Rock garden....then the rains came and washed all the dirt away. The rear 529 Yukon "cryo only" gears have no issues so far. (1-29-2007) Sam's rig started life as a 2nd gen Runner V6 5 speed. He now has double cases with a 4.7 in the rear, 529 Genuines front/Yukons rear, and 38" SX tires. As of this writing, he is soon upgrading to 39.5" tires. ZUK 1-29-2007 DEC 29, 2012---The above fuzzy cellphone pic was just sent to me from Sam. The front diff is still functional but the rear diff shown above finally blew.....took about 8 years and 40 inch tires but it did finally go bye-bye.