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Rear end hum

Discussion in 'Mechanic's Corner' started by kennythewelder, Jan 31, 2021.

  1. kennythewelder

    kennythewelder B31-3 (6 G ) certified

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    Its all together. Everything is within spec, and the contact pattern looks good. I will install it tomorrow. 20210211_152057.jpg 20210211_152007.jpg
     
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  2. OldCracker29

    OldCracker29 I've been knocked down drug out and left for dead

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    I hope everything goes well. :thumbs:
     
  3. kennythewelder

    kennythewelder B31-3 (6 G ) certified

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    Thanks.
     
  4. kennythewelder

    kennythewelder B31-3 (6 G ) certified

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    The diff is installed. Its to late, dark, and cold for pics rite now. The new diff seems happy. No noise at all, and no slipping on the wet roads, but I am driving it easy for the brake in, 500 miles.
     
  5. OldCracker29

    OldCracker29 I've been knocked down drug out and left for dead

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    :cheers:
     
  6. kennythewelder

    kennythewelder B31-3 (6 G ) certified

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    So Im working on the brake in. Drove 4 miles home from the shop around 6:00 last night. Let it sit for 30 mins, then drove 10 miles,and let it sit over night. This morning, I drove it 16 miles, then came back home, and let it sit for maybe 2 hours. Left again and went another 15 miles, then let it sit for about another 2 hours. Early this afternoon, I put it on the HWY. I figured with about 45 miles of in town driving, it was ready for the HWY. I got it to 70, and all was good. Then 75, and 80, still no noise at all. So with lite traffic, I brought it up to 100 for about 1 min. Still all good. Backed off back to 75, and at that, 2500 RPMs. No noise at all from the diff. Im at just under 100 miles now, and home for the night. I know I still have to take it easy, no burn outs, no pulling anything for 500 miles.
     
  7. OldCracker29

    OldCracker29 I've been knocked down drug out and left for dead

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    Can you tell any noticeable difference going from 3.42 to 3.73? :dunno:
     
  8. kennythewelder

    kennythewelder B31-3 (6 G ) certified

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    Somewhat, but since I cant hammer on the gas peddle until after 500 miles, it limits what I feel. Im at about 100 miles now. It may be a few weeks before I make 500 miles,IDK. The 342s always pulled good from a dead stop, but these do seam to pull better. Also, it rained a lot Friday, so the first test drives were on wet roads. The Eaton truetrac works grate. A lot less slipping when taking off in the wet conditions.
     
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