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?
TORQUE ROD REPLACEMENT
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by MRMTRANS, Apr 25, 2023.
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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. -
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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Metal to metal is violation. They aren't that expensive.
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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.
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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. -
W923 Thanks this.
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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.
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