Vibration/grinding on takeoff

Echorama33

TRX Member
Joined
Nov 25, 2022
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Location
Fredericton, NB, Canada
Current Ride
2022 Ram TRX
Hi - hoping someone can help here. When I take off from a stop the truck randomly makes a stutter/grinding vibration for just a small amount of time . Maybe similar sound to when you hit a rumble strip. Seems possibly transmission related and only occurs from start. Happens randomly. Truck has 1500 miles on it.
 
Hi - hoping someone can help here. When I take off from a stop the truck randomly makes a stutter/grinding vibration for just a small amount of time . Maybe similar sound to when you hit a rumble strip. Seems possibly transmission related and only occurs from start. Happens randomly. Truck has 1500 miles on it.
check your fluid levels. especially transfer case.
 
Hi - hoping someone can help here. When I take off from a stop the truck randomly makes a stutter/grinding vibration for just a small amount of time . Maybe similar sound to when you hit a rumble strip. Seems possibly transmission related and only occurs from start. Happens randomly. Truck has 1500 miles on it.
What’s your trans temp? Is it fully warmed up (over 160) or does it make the noise all of the time even when cold?
 
I would say it seems to make the noise when cold....perhaps not when warm. Either way, it shouldn't be making any noise - cold or warmed up. That is my expectation of any vehicle...certainly a new one.
 
Maybe fluid levels aren't appropriate? WOuldn't think so on a new vehicle but I'm sure it happens. It's odd...
My front diff, rear diff, and transfer case were all low from the factory. I would check them all and not just assume they are correct
 
I would say it seems to make the noise when cold....perhaps not when warm. Either way, it shouldn't be making any noise - cold or warmed up. That is my expectation of any vehicle...certainly a new one.
Yes it shouldn’t make a noise. I’m trying to help narrow down what the cause could be. I’m asking because mine developed a noise when warm and the transmission was low on fluid by a quart. The only way to check the trans is when it’s completely cold and should be done by your dealer. Take it in and have the tech go for a test drive with you. Mine was never resolved. FCA / Stellantis claimed it wasn’t catastrophic and I sold the truck. You’re new to the forum but we’ve had countless trucks with low fluid levels in diffs and transfer cases.
 
Yes it shouldn’t make a noise. I’m trying to help narrow down what the cause could be. I’m asking because mine developed a noise when warm and the transmission was low on fluid by a quart. The only way to check the trans is when it’s completely cold and should be done by your dealer. Take it in and have the tech go for a test drive with you. Mine was never resolved. FCA / Stellantis claimed it wasn’t catastrophic and I sold the truck. You’re new to the forum but we’ve had countless trucks with low fluid levels in diffs and transfer cases.
The transmission isnt completely cold to check, I think its between 86 and 122 degrees on the zf 8 speed transmissions and with the engine running, you pull the plug on the side of the transmission and there should be fluid trickling out if its full. I do agree with you though, this shouldn't be done by just anybody and should probably be done by the dealer
 
The transmission isnt completely cold to check, I think its between 86 and 122 degrees on the zf 8 speed transmissions and with the engine running, you pull the plug on the side of the transmission and there should be fluid trickling out if its full. I do agree with you though, this shouldn't be done by just anybody and should probably be done by the dealer
Yes cold as in not at operating temp. You can’t take it there and expect them to check it, it’ll have to sit until it’s “cold” which for most dealers is overnight. I’ve been down this road. Reality is it’s a brand new truck that the dealer is going to have to diagnose it. If it’s the trans good luck… My dealer was great, Stellantis / Ram sucked.
 
I checked mine myself, didnt have an issue, just was checking all fluids.
My wife's grand cherokee transmission went out at 5500 miles, no issues at the chrysler, dodge, jeep, ram dealer getting a new transmission, but it was noticeable damage, as in it wouldnt move lol
 
I checked mine myself, didnt have an issue, just was checking all fluids.
My wife's grand cherokee transmission went out at 5500 miles, no issues at the chrysler, dodge, jeep, ram dealer getting a new transmission, but it was noticeable damage, as in it wouldnt move lol
Yup that’s unfortunately the standard with the trans in our trucks. The trans is considered a “restricted” part so they won’t replace it unless your truck isn’t functioning properly or isn’t drivable. I went down that rabbit hole with repeated dealer visits and ultimately they pulled the trans to inspect the flex plate and torque converter. They added fluid early on for one of my first visits. They changed bolts on the flexplate. Still made noise…. Not my problem anymore. I suspected the torque converter was the culprit. There’s a few members with a warm rattle in their bellhousing. That’s how mine started and morphed into a rattle / vibration on acceleration at operating temp. Op I hope yours isn’t the trans and you don’t have to deal with the nonsense I did.
 
Hey guys - here is a video of the sound my truck is making. What do u think? It happens when cold and on shift from 1st to 2nd gear.
I’m not going to be any help on this. I don’t go over 2000 rpm until the temperature is at normal range.
 
No joke, mine has been doing this occasionally too. I have to make a left hand turn onto the main road where I live and then accelerate. So far, it is only when leaving my driveway when shifting from 1 to 2. I've been trying to figure out if it is power steering, transmission, front diff, or somewhere else.
 
I’ve heard that exact same noise in my ‘22 a couple weeks ago. Only once. Same deal, 1-2 shift. I was pulling out from a stop and turning right accelerating pretty hard up a slight grade. Rear wheels slipped a little (wet pavement) and that’s when I heard the noise. I figured it was the t-case trying to send more power to the front wheels and had a hiccup. I’ve seen the video by @PotterTRX discussing low fluid levels in the diffs and t-case from the factory. So I ordered a quart of the fancy Borg Warner transfer case juice. Haven’t checked my level yet though.
 
The video I posted is pretty clear and I can reproduce it fairly easily. It is going to the dealer tomorrow morning. I sent them the videos ahead of time. I’ll let u know what I hear back.
 
The video I posted is pretty clear and I can reproduce it fairly easily. It is going to the dealer tomorrow morning. I sent them the videos ahead of time. I’ll let u know what I hear back.
Yes it is very clear. And sounds identical to what I am experiencing. Looking forward to what they say. Thanks for keeping us posted.
 
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