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    Results 1 to 10 of 10
    1. #1
      Join Date
      Feb 2010
      Location
      NE Arkansas
      Posts
      616

      Noise coming from passenger rear wheel

      I took my 71 camaro to the alignment shop to have my front end aligned and brake bled.

      My brakes are all new parts. OE style disc in front and drums in rear.


      I get about a mile from home and noticed a sound coming from the rear that I never heard before. Pull into the driveway and noticed at certain intervals the passenger will would shake a bit. Almost like a drag / grinding / vibration.


      I jack the rear of the car up and check the driveshaft and it seems fine. I still may pull it and check it.


      I try to rotate my rear wheels and they have a lot of drag on them, almost hard to turn. Going backwards seems to put more drag than going forward, but it's doing the same thing no matter what.


      Do you think they over tightened the rear drums, or is this a sign of properly adjusted rear brakes and I need to give it time to settle in?


      It just boggles me that it didn't do this until after it went into the shop. But it seemed fine leaving, and started the noise as I was coming down the road to the house.




      Anything else I might need to look for?
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      http://www.nastyz28.com/forum/showthread.php?t=241037

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    2. #2
      Join Date
      Feb 2010
      Location
      NE Arkansas
      Posts
      616


      Here's a video of the noise
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      http://www.nastyz28.com/forum/showthread.php?t=241037

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    3. #3
      Join Date
      Jan 2005
      Location
      Appleton WI
      Posts
      374
      Country Flag: United States
      Did you have the rear end serviced? Sounds like they missed the posi additive.

      Jim
      1968 Camaro --502HO, ATI 10" TreeMaster, Hughes TH400 with Gear Vendor's OD, Moser 12-bolt, RideTech StrongArms and MuscleBar, Chris Alston G-bar rear suspension, 2 1/8" by 4" Lemon's Headers through 3" Pypes X-pipe and Hooker AeroChambers.

    4. #4
      Join Date
      Feb 2010
      Location
      NE Arkansas
      Posts
      616
      They didn't, but now that I think of it I can't remember if I put any posi-additive in the rear end. I remember putting limited slip lube, but that's it.
      My build thread

      http://www.nastyz28.com/forum/showthread.php?t=241037

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    5. #5
      Join Date
      Dec 2010
      Location
      Fredericksburg, VA.
      Posts
      3,155
      Country Flag: United States
      I would like to know more about the history of the rear end. Is it new or has it been serviced recently? When you say "limited slip lube" what exactly do you mean? Did you fill it with an 80w-90 gear oil with friction modifier already added or did you fill it with 80w-90 and add a separate bottle of friction modifier?

      To me it sounds like it could be one of the following:

      1. The posi-trac clutches are grabbing, but not knowing what you have done to the rear end it is hard to say.
      2. The axle seal or brake cylinder is leaking oil on the brake shoes causing them to grab the drum.
      3. The wheel bearing has gone bad.

      It is not possible the alignment is the issue and the resistance to rotating the wheels is just an indication of the brakes adjusted up snug which will normally go away with driving. Again, not knowing the history of the rear end I would do a couple of things to find the source of the noise.

      1. Remove the rear wheels and brake drums and make sure there is no gear oil or brake fluid leaking onto the shoes.
      2. Drain the differential and refill it with a quality non-synthetic 80w-90 gear oil and add a 4oz bottle of quality friction modifier. Then take the car out to an empty parking lot and drive in slow circles a dozen or so times in each direction to work the friction modifier into the posi clutches.

      Let us know what you find.
      Steve Hayes
      "Dust Off"
      68 Camaro

      Given sufficient initial acceleration, even pigs can fly!

    6. #6
      Join Date
      Aug 2007
      Location
      Jonesboro, Arkansas
      Posts
      2,506
      Country Flag: United States
      I agree with Steve, I would also pull that hub to see if anything has come loose in it and is in a bind. I'm thinking if the additive wasn't added to the rear end grease, it would make noise in both sides. I'm betting on loose "something" in that hub.

      Carl Wilson
      1968 Camaro - T-56 6 speed - 383 Stroker, 2014 Mustang GT seats. FiTech EFI, Tanks Inc. Tank with Deutschwerks fuel pump.

    7. #7
      Join Date
      Feb 2010
      Location
      NE Arkansas
      Posts
      616
      Pulled the drums and noticed the shoes on the passenger side were oily, and the inside of the drum was oily. Drivers side was clean. The only place I could see any oil on was around the axle seal on that side. The brake cylinder was dry and clean.

      So I am thinking the axle seal and / or bearing is bad on that side. I don't really know much about this rear end other than it has been sitting for a while on a parts car and I changed the oil in it. So I wouldn't be surprised at the bearings going bad.

      I've been doing some reading on a timkin bearing upgrade. So I guess I will start pulling the axles, inspecting and changing the bearings on each side. Anything else I should do while I am in there?







      My build thread

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    8. #8
      Join Date
      Aug 2007
      Location
      Jonesboro, Arkansas
      Posts
      2,506
      Country Flag: United States
      Hey Dennis,
      can you rotate the wheels with the tires off the ground? you should be able to hear any bad sounds at this time. If you have to replace bearings and seals, and never done it before, i can walk you through it.

      Carl Wilson
      1968 Camaro - T-56 6 speed - 383 Stroker, 2014 Mustang GT seats. FiTech EFI, Tanks Inc. Tank with Deutschwerks fuel pump.

    9. #9
      Join Date
      Feb 2010
      Location
      NE Arkansas
      Posts
      616
      Quote Originally Posted by minendrews68 View Post
      Hey Dennis,
      can you rotate the wheels with the tires off the ground? you should be able to hear any bad sounds at this time. If you have to replace bearings and seals, and never done it before, i can walk you through it.

      I rotated the wheels and it didn't make any noise, but someone pointed out the chatter marks on the inside of the drum in the grease. So that makes sense that the seal leaked on differential lube on the pads.

      Thanks for the offer, I've replaced the seals and bearings before so I'll be ok, already pulled the old seals and bearings out and waiting on the new ones to come in. The drivers axle looked fine, but the passengers axle had a groove in it from the old bearing so i went ahead and ordered a new axle for that side from summit.
      My build thread

      http://www.nastyz28.com/forum/showthread.php?t=241037

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    10. #10
      Join Date
      Feb 2010
      Location
      NE Arkansas
      Posts
      616
      Just wanted to update this thread, I replaced the bearings, axle shaft and seals. Along with the rear drum brake pads since the one of the passenger side got soaked.

      Took a little back and forth in the driveway to get the drum pads to auto-adjust to where they needed to be against the drum

      Noise is gone and all is back to normal now
      My build thread

      http://www.nastyz28.com/forum/showthread.php?t=241037

      Paint Jail Experience

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