Just got a boneyard Rear Differential does this pattern look ok on the Ring Gear?

Discussion in 'Engine & Drivetrain' started by KR66, May 8, 2018.

  1. KR66

    KR66 Member

    Posts:
    75
    Likes Received:
    14
    Joined:
    Sep 17, 2017
    Name:
    Ken
    I just got a G80 GT4 Rear Differential from the bone yard I drained it and cleaned it out when I put the Grease on the Ring Gear this is the pattern I got does it look OK?

    IMG_20180508_160022.jpg IMG_20180508_160016.jpg IMG_20180508_160454.jpg IMG_20180508_160451.jpg
     
  2. swathdiver

    swathdiver Full Access Member

    Posts:
    4,317
    Likes Received:
    2,774
    Joined:
    May 18, 2017
    Location:
    Treasure Coast, Florida
    Name:
    James
    It should be adjusted but being upside down is confusing my brain! I think you gotta take out some backlash but you should check the manual yourself. Get a subscription to AllDataDIY for your truck and to "Gear Tooth Contact Pattern Inspection".
     
  3. KR66

    KR66 Member

    Posts:
    75
    Likes Received:
    14
    Joined:
    Sep 17, 2017
    Name:
    Ken
    Is that better? I rotated them.

    BE720CCD-F6CE-4BF8-8A55-AA7035215B1D.jpeg 32594CD1-8585-450A-AC62-4A084B21ADCF.jpeg E39A9EEE-3441-4114-A9BF-3DCBC515419E.jpeg
     
  4. KR66

    KR66 Member

    Posts:
    75
    Likes Received:
    14
    Joined:
    Sep 17, 2017
    Name:
    Ken
    swathdiver likes this.
  5. swathdiver

    swathdiver Full Access Member

    Posts:
    4,317
    Likes Received:
    2,774
    Joined:
    May 18, 2017
    Location:
    Treasure Coast, Florida
    Name:
    James
    It's hard for me to tell. The wear marks do not appear consistent on each side, the drive and coast. Make sure your backlash is set to between .003" and .005". I think you're slightly out of spec there.
     
  6. KR66

    KR66 Member

    Posts:
    75
    Likes Received:
    14
    Joined:
    Sep 17, 2017
    Name:
    Ken
    It was pulled from a 03 Chevy Tahoe the one axle shaft has a bit of play(maybe due to the backlash?) the other is tight I’m probably going to rebuild the differential that’s in my 01 Yukon when I put this one in? I’m just trying to figure out if this one is going to last without any adjustment for a while or does it need attention now? The pinion also has more play than the one being swapped out! I don’t know what’s wrong with the original yet till I pull it Out? There’s a strange rhythmic noise coming from it! That also seems to be causing a handeling issue like a minor wind drift? Could be the G80 carrier? If that’s the issue I may swap the carriers with the Boneyard one? But until I get the one in there opened up I’m baffled! I would rather have the old case because it has a drain the new on doesn’t?
     
  7. swathdiver

    swathdiver Full Access Member

    Posts:
    4,317
    Likes Received:
    2,774
    Joined:
    May 18, 2017
    Location:
    Treasure Coast, Florida
    Name:
    James
    If this is a temporary fix and that's the way it came, I'd run it as is. But often times, what we intend to be temporal lasts a long time!
     
    KR66 likes this.
  8. KR66

    KR66 Member

    Posts:
    75
    Likes Received:
    14
    Joined:
    Sep 17, 2017
    Name:
    Ken
    Yea that’s what I’m hoping for! So I have time to ge the old one perfect! The rest of the Yukon is like new! I think the previous owner was doing a lot of towing because the rear tires were worn about 75% more than the front I found the invoice and they put 4 tires on at the same time and probably didn’t rotate them! I have only seen rear tires wear out faster than the front for 2 reasons 1 burnouts (not something I think a Stock Yukon XL can do consistently) and 2 a heavy trailer without proper weight distribution. I think the heavy trailer may have damaged the differential in it now! It has a280000 miles on it but all highway because the interior is mint along with a lot of other things like the drivers door hinges are original and still good! Something that wears out rather quickly.
     
    swathdiver likes this.
  9. KR66

    KR66 Member

    Posts:
    75
    Likes Received:
    14
    Joined:
    Sep 17, 2017
    Name:
    Ken
    Well it’s done now I have to get used to how it’s handling! The drift stopped but I think I have developed a muscle memory driving it locally and subconsciously try to correct its handling on certain roads I’m used to driving on! I’ll get used to it! I can’t believe A G80 was causing it to handle that way! I still have to pull the cover off the old one to see what was going on inside it! The axle berings are good and tight there’s no binding it just had a rhythmic noise and caused the Yukon to sway maybe it was locking into posi when it wasn’t supposed to? I will update when I get to open to investigate!
     

Share This Page