TORQUE ROD REPLACEMENT

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by MRMTRANS, Apr 25, 2023.

  1. MRMTRANS

    MRMTRANS Medium Load Member

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    Torque rod (between frame and differentials) bushings show dry rot and wear. But they appear to be within tolerance of play, which is 1/8". I can't see or feel any movement using a 40" tire iron. Should they be replaced anyhow?
     
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  3. W923

    W923 Road Train Member

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    Pictures please.
    What tolerance do you speak of, I am pretty sure you aren’t going to be able to see any movement by hand on a good one.
     
    Bean Jr. Thanks this.
  4. MRMTRANS

    MRMTRANS Medium Load Member

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    This is a screenshot from a video. My truck is attached to a trailer and it's dark outside to take a picture anyhow. That rod attaches to the top of a differential. When I say tolerance, I am referring to any free play because of a worn rubber bushing. Supposedly if if the rod end can be moved any direction 1/8", then the bushings should be replaced or new rods with bushings. I used a bar to try get it to move and couldn't see any movement. But an 1/8" is hard to see unless I have dial indicator magnetically mounted to the frame. But my rods have some noticeable dry rot. I can't decide if hard rubber will lead to problems in the future.
     

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  5. Dave_in_AZ

    Dave_in_AZ Road Train Member

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    Metal to metal is violation. They aren't that expensive.
     
  6. MRMTRANS

    MRMTRANS Medium Load Member

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    Your missing what I am saying. Metal isn't touching metal. The bushings are in tact. They just have a lot of dry rot cracking as they have 1 million miles since last replaced. There is no visible free play to the naked eye when trying to get movement with a 40"tire iron. And no sense in spending $ if unnecessary, even if they are only $160/rod (already checked price). The dealer says there aren't rubber bushings for the rods. I'll check elsewhere, but I don't want to even bother if not necessary.
     
  7. Goodysnap

    Goodysnap Road Train Member

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    You sound like you already talked yourself out of replacing them. So wait until they get worse and replace them later.

    If there is no movement, they will be fine.

    They are also tracking rods, not torque rods.
     
    krupa530 Thanks this.
  8. JB7

    JB7 Medium Load Member

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    When you do decide to replace use the dealer part, especially if they lasted 1m miles. Had a similar situation with a 96 Toyota that needed control arm bushings. Toyota did not sell just the bushings, only the complete control arm. Aftermarket bushing kits (Moog) were about $400 cheaper so I went that route. Original bushings were 23 years old and about 300k miles. A few weeks ago had it on stands for oil change and tire rotation. One bushing was split bad, only after 3-4 years and about 15k miles. So now it has to come apart again and also have alignment. Aftermarket parts rarely ever worth it.
     
    W923 Thanks this.
  9. Mnmover99

    Mnmover99 Light Load Member

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    Freightliner sells bushings that are not rubber but instead a composite that does not crack from being exposed to oil and sunlight.
     
  10. W923

    W923 Road Train Member

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    I would agree that aftermarket is often not a good deal however there are some companies that are undoubtedly offering better products that oem for considerably less money. The trick is knowing which ones are good and bad. I am surprised you had that bad of a problem with moog but I will say that rubber products in general are troublesome anymore and I would honestly doubt an oem Toyota one would last as long as the original….but would like to think more than 4 years
     
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