Spyntec Installed now strange noise - Dodge Cummins Diesel Forum
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post #1 of 77 (permalink) Old 09-14-2019, 02:14 PM Thread Starter
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Spyntec Installed now strange noise

I recently had the Spyntec Kit installed on my 2016 Ram 3500 Long Bed Laramie, 126k miles, a few days ago. Installation went well other than having to get the front wheels machined to fit over the new hubs. New opening is 4.25". The machining was only done on the outer part of the wheel where the center cap usually goes on. The backing plate of the wheel, which sits against the brake rotor was not touched as the Spyntec hub fit through this opening with no issues. These are stock Sport package 20" wheels.

I used Moog greasable u-joints. I am thinking maybe I should have used factory u-joints instead. However the price difference is fairly steep.

When the tires were put back on the wheels the shop only put 50psi. Went back and had the tires inflated to 65psi, which is what I have always run in them. It almost sounded like the tires had flat spots in them when driving over 50mph. There was a bit of shaking in the tires but not in the steering wheel. Took the truck back once more and had the left front tire re-balanced. This cleaned up the ride a little but still could feel every bump in the road.

Saturday I took the truck to a shop that has a road force balance machine. This made the ride quality much better. However the front tires still sound funny to an extent. Almost like they are slapping the road.

I checked behind the wheel to make sure the backing plate was seated completely against the brake rotor. The front and read seem to have the same distance between them.

I am not really sure what to check next. I am thinking about trying a different set of wheels that don't need anything done to them. The tires still have at least have the tread life left and have been rotated every 5k miles.

I am not thrilled with how much the hubs stick out. However once I change wheels it should not be an issue.

Does anyone know if these are tapered at all or if they are straight? They look straight to me, however without measuring them in a few places I cannot be sure.

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2016 3500 4x4 Laramie Crew Cab Long Bed, Sport Package auto.
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post #2 of 77 (permalink) Old 09-14-2019, 03:54 PM
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Sounds like the wheel does not fit the hub centered. When ever you have a wheel center opened up, you should make sure the opening is bigger than the hub center to allow the wheel to center on the studs.
Have you also checked to make sure the hubs are disengaged? Could have one on and the other off.

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post #3 of 77 (permalink) Old 09-14-2019, 04:06 PM Thread Starter
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Just checked the hubs and both are set to free. Would it be ok for the center of the wheel to have a small gap around the hub or should it be tight?
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post #4 of 77 (permalink) Old 09-14-2019, 05:08 PM
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I like a slight gap that is even all the way around to make sure the wheel centers on the studs instead of the hub. You might have a wheel that has the stud hole off and the freedom to move has set it off center.

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post #5 of 77 (permalink) Old 09-16-2019, 07:16 PM Thread Starter
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Small gap around hub now. Front tires road force balanced again today. No change in noise.
Possibly changing wheels but I really hate to put any money into it without knowing what the cause is.
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post #6 of 77 (permalink) Old 09-16-2019, 07:40 PM
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Quote:
Originally Posted by cwendel View Post
I like a slight gap that is even all the way around to make sure the wheel centers on the studs instead of the hub. You might have a wheel that has the stud hole off and the freedom to move has set it off center.
And that's exactly why OE wheels are hub centric, so they can't be free to move around due to the wheel studs potentially being off a bit.

In other words, there shouldn't be a slight gap.
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post #7 of 77 (permalink) Old 09-16-2019, 07:43 PM
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Quote:
Originally Posted by cwendel View Post
Have you also checked to make sure the hubs are disengaged?
Quote:
Originally Posted by Brannon View Post
Just checked the hubs and both are set to free.
Set to "Free" and actually disengaged isn't always the same thing. You may want to check that they really are.

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

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post #8 of 77 (permalink) Old 09-16-2019, 07:52 PM Thread Starter
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It has been jacked up off the ground and tested. I will drive around my neighborhood with both hubs in the lock position and make sure they functions as intended.
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post #9 of 77 (permalink) Old 09-16-2019, 07:54 PM
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No need to lift it, or drive.
Just put both hubs in Free and check if the axle shafts can be rotated.

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

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post #10 of 77 (permalink) Old 09-16-2019, 08:08 PM Thread Starter
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Even better. Will post results in a little bit.
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post #11 of 77 (permalink) Old 09-16-2019, 08:22 PM
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Is this axle still the AAM?

If so,

Did you lube that inner bearing in the back? the stub shaft rides on it

Did you put a temp gun on the hub to check temps?

for reference...

https://www.cumminsforum.com/forum/3...l#post26524442

and

https://www.cumminsforum.com/forum/3...l#post28180170

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post #12 of 77 (permalink) Old 09-16-2019, 08:41 PM Thread Starter
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Quote:
Originally Posted by Jimmy N. View Post
No need to lift it, or drive.
Just put both hubs in Free and check if the axle shafts can be rotated.
Put both in free and they spin fine. Put both in lock and the donít turn.

Steve05ram360

The axle is still AAM.

I did not install the kit, however I was there watching while it was done. The installer used plenty of red grease when he installed this kit.

I do not currently have a heat gun. However I have checked both hubs multiple times. On a few minute drive vs a few hour drive they feel like they are the same temp by hand. They are warm to the touch but nothing uncomfortable.

I have a feeling that machining the outer hub covers of the wheels may have something to do with this. Just to reiterate this was only the face of the wheel. Nothing in the backing plate or bore center was touched.

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Last edited by Brannon; 09-16-2019 at 08:43 PM. Reason: Punctuation
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