Good Sam Club Open Roads Forum: Tow Vehicles: Ram 3500 issue
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 > Ram 3500 issue

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TxGearhead

Texas

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Posted: 08/26/21 03:22pm Link  |  Quote  |  Print  |  Notify Moderator

2018 Ram 3500, Cummins, Aisin, 3.73.
I began noticing a few months ago that under very light braking...backing out of the garage and turning, I felt a jerking. I'm on the road and almost back home. It is very pronounced while pulling the 5th. Taking off from a stop and turning it acts like it's in 4 wheel drive. Sitting around the campground a couple weeks ago I mentioned it. One guy said his employer had a fleet of Rams that would do the same when in skid control and in 4x4. I turned skid control off and could tell no difference. Almost feels like a u-joint or posi trac differential clutches grabbing.
Anyone heard of this or experienced it? I'm due to visit my dealer when I get home and will get them to look.
Just rolled 50,000 miles.

* This post was edited 08/26/21 03:32pm by TxGearhead *


2018 Ram 3500 CC LB DRW 4X4 Cummins Aisin Laramie Pearl White
2018 Landmark Oshkosh
2008 Bigfoot 25C9.4
2014 NauticStar 21 ShallowBay 150HP Yamaha
2016 GoDevil 18X44 35HP Surface Drive

IdaD

Idaho

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Posted: 08/26/21 04:22pm Link  |  Quote  |  Print  |  Notify Moderator

Could be the front drive u-joints going bad although I wouldn't think they'd be bad at 50,000. Any noise at all?


2015 Cummins Ram 4wd CC/SB


TxGearhead

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Posted: 08/26/21 05:00pm Link  |  Quote  |  Print  |  Notify Moderator

What I'm thinking..front u joints. No noise at all. Does fine going straight or moderate speed curves.

Grit dog

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Posted: 08/26/21 05:25pm Link  |  Quote  |  Print  |  Notify Moderator

Seems very early for a failure but likely front axle u joint. Once they get dry and start binding it’s like a mild case of trying to turn on dry pavement in 4wd. Steering wheel will seesaw back n forth a little.
Once they wear enough they will get loose and not do that but will clunk. Sounds like early stage of a u joint going out


2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29

TxGearhead

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Posted: 08/26/21 05:28pm Link  |  Quote  |  Print  |  Notify Moderator

What I'm thinking..front u joints. No noise at all. Does fine going straight or moderate speed curves.

Fisherman

Angus, Ontario, Canada

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Posted: 08/26/21 06:43pm Link  |  Quote  |  Print  |  Notify Moderator

What you said, front U joints. Simple to check. Jack up one front wheel of the truck with the steering turned all the way either left or right. Try and rotate the wheel by hand. If it's hard to do, there's your problem, then do the other side. There is a company in the US that makes CV joints with the axle for 2500/2500 RAMs similar to these. Get them installed and the problem doesn't come back. The ones I saw were around $500 and a direct fit for newer RAMs. https://www.rcvperformance.com/axlesets/dodge/dodge-ram-2500-3500-rcv-axle-set.html

TxGearhead

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Posted: 08/26/21 08:16pm Link  |  Quote  |  Print  |  Notify Moderator

Does the 2018 Ram 3500 have the infamous Ram plastic u joints, like earlier 2500?

blofgren

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Posted: 08/26/21 09:28pm Link  |  Quote  |  Print  |  Notify Moderator

Have you replaced the rear differential fluid? Mine was starting to act as you describe and the problem disappeared when I replaced the factory fluid with Amsoil Severe Gear. The factory fluid is junk; I would have replaced it when the truck was brand new if I had known that at the time.


2013 Ram 3500 Megacab DRW Laramie 4x4, 6.7L Cummins, G56, 3.73, Maximum Steel, black lthr, RAM 20k sliding hitch, Retrax, Linex, and a bunch of options incl. cargo camera
2008 Corsair Excella Platinum 34.5 CKTS fifth wheel with winter package & disc brakes

TxGearhead

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Posted: 08/27/21 04:50am Link  |  Quote  |  Print  |  Notify Moderator

I'm changing my mind, or losing it. I've been hard on the road and am wore out. In my original post I almost said it feels like a broke pinion or ring gear.
I'll be home tonight and will be shopping for synthetic gear oil. I'll do that before the dealer runs a bill on me changing parts.

* This post was edited 08/27/21 04:57am by TxGearhead *

MFL

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Posted: 08/27/21 05:17am Link  |  Quote  |  Print  |  Notify Moderator

No experience with Amsoil synthetic gear lube, but have noticed Cummins 12V recommend this many times. He tows heavy, covers lots of miles. I believe he changes to this lube not long after new truck purchase. While no one is right about all things, involving trucks, tires, or products, he has a very good average!

Jerry





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