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IRS Bushing Replacement and Identifying Diff housing weight

Discussion in 'New Edge Cobras' started by vdubn, Oct 10, 2019.

  1. vdubn

    vdubn New Member Established Member

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    I just pulled my IRS rear unit out yesterday and I am in the process of replacing all of the bushings, the tie rods, and swapping in the 2003/2004 cross brace that bolts to the rear diff. I noticed that there is a weight that hangs off of the front of the differential. I think this is a sound isolator or something similar. I think the other 8.8 solid rear axles had a similar weight hanging off the front. I don't think there is any harm in eliminating it, but thought I would ask, in the even that it has a purpose that I am unaware of.

    The back of the car feels like it pretty much swims as I cross any lanes on the highway that have any slight groves in them, and any bumps pretty much feel like the car is bouncing left and right, so I am looking forward to getting everything tightened up.
     

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  2. slo984now

    slo984now AKA 01yellerCobra Established Member

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    It's a harmonic dampener. Most people remove it without issue. It also becomes useless once you change gears.
     
  3. vdubn

    vdubn New Member Established Member

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    What do you mean worthless once you change gears? Was the dampener only good with the taller/stock gears. As in changing gear ratios? My car has 4.10 gears so it probably is useless already.
     
  4. slo984now

    slo984now AKA 01yellerCobra Established Member

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    It was designed to work with the stock 3.27 gears. When you change the gears to a different ratio the harmonics change. Just remove it when you install the pinion brace.
     
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  5. shurur

    shurur Well-Known Member Established Member

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    might make a nice paperweight
     
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