Is anyone familiar with this? I am certain I will need to pull the 3rd member to find out what this is. Any comments before I go elbow deep?
rear differential is banging when I take off!
- Thread starter alaska60
- Start date
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The only thing I'd suggest before getting elbow deep is to stop driving it until you find the problem. 
Are you sure it is in the diff and not the rear shaft needing to be greased?
- Thread starter
- #4
I havent pulled it apart yet as I have never heard this before today. low Greased axle will do this???..... it sounds like it is slipping for a split second and....bang! it engages.
- Thread starter
- #5
The drive shaft has new ujoints as well as plenty of grease in the yoke and joints.
- Thread starter
- #6
I guess I should state that it only bangs once and then it runs fine. when I stop it does it all over again. One bang and off we go!
check
Check for play in the driveshaft at the rear as it leads to the third member.
Do you have an auto locker like an Aussie or Lockright?
Pinion nut, flange bolts, inner splines on axles or axle, improperly toleranced locker install. retainer clip failure. Ring or pinion gear tooth damage.
Somebody smarter widdle this list down a bit??
Check for play in the driveshaft at the rear as it leads to the third member.
Do you have an auto locker like an Aussie or Lockright?
Pinion nut, flange bolts, inner splines on axles or axle, improperly toleranced locker install. retainer clip failure. Ring or pinion gear tooth damage.
Somebody smarter widdle this list down a bit??
inkpot
SILVER Star
Howdy! Sounds like you need to drop the rear DS and test the pinion bearing preload by rotating the flange back and forth. You may have to put a lot of torque on it to see if it is creeping in and out of the nosecone of the diff. That's a bad sign if it is. John
did this new noise coincide with the new ujoints?
Did everything get marked so when the new ujoints were installed the shaft went back together correctly?
just a thought...
Tim
Last time I heard something like what your describing it was replacement gears that fixed it.
When starting it bangs like its not aligned but the bang aligns it. Around a turn it bangs like the shift miss aligned it and it had to "bang" to realign.
If thats what it sounds like, I'd say its time for new gears in the 3rd member.
When starting it bangs like its not aligned but the bang aligns it. Around a turn it bangs like the shift miss aligned it and it had to "bang" to realign.
If thats what it sounds like, I'd say its time for new gears in the 3rd member.
I had an FJ40 that did this. Turned out to be spiders and the shaft thtat were buggered, the ring and pinion were fine. Take off the cover and have a look.
x2 only on a buddies 10 bolt in his chevy pickup.
