Sloppy trac rite lsd? - Dodge Cummins Diesel Forum
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post #1 of 15 (permalink) Old 11-25-2019, 12:53 PM Thread Starter
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Sloppy trac rite lsd?

Is this normal to have this much noise and slop with these aam 11.5 trac-rite units? I can hear it clanking when I drive too. And when I shift from drive to reverse. Super annoying. Here two videos .


https://m.youtube.com/watch?v=Zheg3AmMiG0

https://m.youtube.com/watch?v=9Gr0osXe-RE

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post #2 of 15 (permalink) Old 11-25-2019, 02:46 PM
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Measure the backlash!

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post #3 of 15 (permalink) Old 11-25-2019, 03:11 PM
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Backlash is way too much. With that amount you should hear it while driving.

Move the ring gear in some and check pattern. Once acceptable, measure backlash. I’d be shooting for .005-.010 depending on the miles you have.
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post #4 of 15 (permalink) Old 11-25-2019, 09:27 PM
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Originally Posted by 5.7 Hemi View Post
Backlash is way too much. With that amount you should hear it while driving.

Move the ring gear in some and check pattern. Once acceptable, measure backlash. Iíd be shooting for .005-.010 depending on the miles you have.
That's not the right answer.
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post #5 of 15 (permalink) Old 11-25-2019, 09:49 PM
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Like hell! I set up rears all the time. That much “looseness”, ring gear is too far from the pinion.....given the pinion is tight.
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post #6 of 15 (permalink) Old 11-26-2019, 12:45 PM Thread Starter
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Is it possible that the sound it coming LSD unit? I know I need to measure backlash still but, I don’t here any whining or howl when driving. It’s hard to tell from the videos but the clank is coming from the lsd unit itself or axle splines? The pinion seems tight and no play in any direction. When I rotate the ring gear the pinion gear is also turning and then you hear the clank. So whatever the backsplash is if I “preload” the ring and pinion against each other so there no slop for them to slap against, and keep rotating the ring gear then there’s that free play to the clank sound. Here are some pictures. Truck has 46k miles. It doesn’t seem like any excessive wear on the ring and pinion right? There’s no lip on the ring gear on either side. I think contact looks good?
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post #7 of 15 (permalink) Old 11-26-2019, 03:48 PM
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You can not move the ring gear inward/outward. It moves side to side. The pinion gear can be moved in or out!

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post #8 of 15 (permalink) Old 11-26-2019, 03:49 PM
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Again! Measure the backlash.
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post #9 of 15 (permalink) Old 11-26-2019, 03:59 PM
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Or check the contact pattern with paste and find out which gear needs to be moved in what direction.
And then measure backlash once the pattern is correct(ed).

Maybe if we start telling people that the brain is an app, they will start using it?

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post #10 of 15 (permalink) Old 11-26-2019, 04:46 PM
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Or check the contact pattern with paste and find out which gear needs to be moved in what direction.
And then measure backlash once the pattern is correct(ed).
Oh wait, that makes too much sense..... can't do that. I put nothing into the video as far as being valid troubleshooting . Clean the oil off of any ring and pinion and you will hear a clank.
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post #11 of 15 (permalink) Old 11-26-2019, 05:13 PM
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You have been given ideas, gotta start somewhere.
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post #12 of 15 (permalink) Old 11-27-2019, 12:12 AM Thread Starter
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Quote:
Originally Posted by Jimmy N. View Post
Or check the contact pattern with paste and find out which gear needs to be moved in what direction.
And then measure backlash once the pattern is correct(ed).
Oh wait, that makes too much sense..... can't do that. I put nothing into the video as far as being valid troubleshooting . Clean the oil off of any ring and pinion and you will hear a clank.
Thank you for your kindness. I obviously heard the noise with the gear oil in and driving around which is why it came to pulling the cover off to look inside. The clank didn’t just magically appear after draining the oil and making a video. This is my first diff issue and don’t have the experience as other do like maybe you? So you say any ring and pinion will clank ? Even when given the correct backlash? Let’s just the video is a preliminary investigation question for me to help diagnose the issue before I get actually measuring backlash.
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