I wanted to start a thread that compiles all the collective, up-to-date knowledge of remedies, repairs, and replacements related to vibrations that originate at the front differential.
It has been identified in a number of previous threads that vibrations may originate from a worn needle bearing and/or CV axle shaft on the driver's side of the front diff, a condition that is often exacerbated by putting a lift on the truck. A worn bearing/axle shaft condition may be present if you experience vibrations/groaning/growling (most typically between 30-40 mph, but also at other speeds) and the vibrations disappear the instant you switch from H2 to H4.
Some members whose trucks have experienced front end vibes have tried using a differential drop kit (such as Toytec's) to alleviate vibes with mixed success. A number of members have had their front differentials replaced (some under warranty and some by paying out-of-pocket) with mixed success. Recently, a number of members have allegedly attempted to replace the needle bearing and other appertenant parts themselves -- without removing the diff from the truck -- as a DIY job with mixed success.
Let's try to keep this thread as tidy, concise, relevant, and on-topic as possible. This is not a place to discuss rear driveline vibration issues, rear carrier bearings, rear driveshafts, axle shims, or other irrelevant matters.
Here is a list of threads that are relevant (will be updated as needed to include other threads -- I'm open to suggestions about other threads that should be included):
"Front end growling noise" (Patrick0625):
"Front diff bearing replacement" (Silver_Taco):
"Front end clunk found! questions about front diff now" (Krookz): THREAD DELETED
"Front differential side bearing replacement.. done!" (Metallikatz3):
NEW!! Here is a great write-up on how to remove the driver's side CV to access the side bearing in the front diff:
"How To Remove CV Axle+Replace Front Wheel Bearing 2nd Gen" (KenpachiZaraki):
UPDATE!! Chase and friends at East Coast Gear Supply (ECGS) have invented--and now produce and sell--a fix for this vibration issue using a PFTE bushing that replaces the needle bearing in the front diff. I installed the bushing in mine and it makes a WORLD of difference. No more annoying vibes or growling noise!
Skip to page 4 of this thread and read on. Check out East Coast Gear Supply on Facebook: http://www.facebook.com/#!/pages/Eas...ly/21641121597 or go to their website to order a bushing and needle bearing removal tool: http://eastcoastgearsupply.com/i-853...-and-tool.html
We all need to thank Chase and ECGS a million for coming up with this fix!!!