Does anyone have a clue?
This is normal limited slip behavior. I actually want to rebuild mine tighter while others want theirs to slip more, weird 
I guess I got used to the way my automatic locker worked on my last truck.
Changing the oil in the differential is easy. You have two choices.
1) use a vacuum pump (one that will work with real thick oils) to remove the old oil, or
2) take off the differential cover and drain it that way.
Option one is less messy, but less effective at removing old oil. There is (on most axles) a fill plug on the front side of the axle near the pinion seal. Basically slide under the truck, forward of the rear axle, and look on top/front of the pumpkin. The plug is often a 3/8" square hole. Place a tube down in there as far as you can and pump it out. Replace with new oil and friction modifier until the oil reaches the hole. If the axle is off the ground, turn the tires about and let the oil settle down in there and top off if needed.
Option two will remove more oil but it more messy and time consuming. To drain, remove the differential cover bolts, pry the cover off and let it drain. Wipe out whatever sits in the bottom of the pumpkin. As you let it drain more, scrape off all of the RVT sealant from the differential cover and the differential mating surfaces. A scraper and sealant remover foaming spray work well. Clean the sealant remover off, and apply a small bead around the mating surface of the differential. It needs to set for some time (read the instructions). Bolt the differential cover on very loosely by hand, and let it sit for a couple hours to let the RVT sealant cure. After the time passes bolt it back on and torque it to specs in a star type pattern. Re-fill oil in the fill plug on top of the axle.
It is a good idea to spray the fill plug with PB blaster or something the day before as it can get rusted on pretty well.
I guess I got used to the way my automatic locker worked on my last truck.
Changing the oil in the differential is easy. You have two choices.
1) use a vacuum pump (one that will work with real thick oils) to remove the old oil, or
2) take off the differential cover and drain it that way.
Option one is less messy, but less effective at removing old oil. There is (on most axles) a fill plug on the front side of the axle near the pinion seal. Basically slide under the truck, forward of the rear axle, and look on top/front of the pumpkin. The plug is often a 3/8" square hole. Place a tube down in there as far as you can and pump it out. Replace with new oil and friction modifier until the oil reaches the hole. If the axle is off the ground, turn the tires about and let the oil settle down in there and top off if needed.
Option two will remove more oil but it more messy and time consuming. To drain, remove the differential cover bolts, pry the cover off and let it drain. Wipe out whatever sits in the bottom of the pumpkin. As you let it drain more, scrape off all of the RVT sealant from the differential cover and the differential mating surfaces. A scraper and sealant remover foaming spray work well. Clean the sealant remover off, and apply a small bead around the mating surface of the differential. It needs to set for some time (read the instructions). Bolt the differential cover on very loosely by hand, and let it sit for a couple hours to let the RVT sealant cure. After the time passes bolt it back on and torque it to specs in a star type pattern. Re-fill oil in the fill plug on top of the axle.
It is a good idea to spray the fill plug with PB blaster or something the day before as it can get rusted on pretty well.
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Joined: Feb 2007
Posts: 41
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AZ Infidel,
First off, thank you for being on the front line. I am from AZ myself, Ft. Huachuca and sorely miss it.
Your post concerning the TSB for rear end shudder is exactly demonstrative of my current problem on my 06' screw, limited slip, 4x4. Do you know if this has been updated for newer models?
First off, thank you for being on the front line. I am from AZ myself, Ft. Huachuca and sorely miss it.
Your post concerning the TSB for rear end shudder is exactly demonstrative of my current problem on my 06' screw, limited slip, 4x4. Do you know if this has been updated for newer models?