eTorque Bearing Replacement, Fixed Grinding Noise

[DocLeeOnKeyz]

I was able to successfully replace the part. The truck starts and sounds great. However, its still not charging the battery beyond 12V so the moment you hit the brakes, use a turn signal or a fan kicks on, the truck begins a downward spiral until it dies. I put in a new 12V battery because it still had the original battery from 2019 but that wasn't the problem. The dealer is saying its the MGU and I'm sure it is. I'm just wondering does it need to be recalibrated or flashed? Maybe it made changes in the computer to account for the poor performance that needs to be wiped?

 

[DocLeeOnKeyz]

Apologies for the dual post. It won't let me add on to my previous post. For timeline purposes, the service department did order a replacement today and requested the vehicle be placed on the VOR (vehicle off road) list. I will update this thread if the VOR part arrives before the replacement I already ordered August 26, 2025.

 

[wwright]

I was able to successfully replace the part. The truck starts and sounds great. However, its still not charging the battery beyond 12V so the moment you hit the brakes, use a turn signal or a fan kicks on, the truck begins a downward spiral until it dies. I put in a new 12V battery because it still had the original battery from 2019 but that wasn't the problem. The dealer is saying its the MGU and I'm sure it is. I'm just wondering does it need to be recalibrated or flashed? Maybe it made changes in the computer to account for the poor performance that needs to be wiped?

Thanks for posting this.
That's the main thing that I was concerned with too by replacing the bearing as I know it'll fix the noise, but wasn't sure if it'll fix the charging issue.

 

[Nonducor]

I was able to successfully replace the part. The truck starts and sounds great. However, its still not charging the battery beyond 12V so the moment you hit the brakes, use a turn signal or a fan kicks on, the truck begins a downward spiral until it dies. I put in a new 12V battery because it still had the original battery from 2019 but that wasn't the problem. The dealer is saying its the MGU and I'm sure it is. I'm just wondering does it need to be recalibrated or flashed? Maybe it made changes in the computer to account for the poor performance that needs to be wiped?

Were you able to replace both front and rear bearings or just the one?
I had an improvement in charging but still have an occasional whine that I think is from the front bearing...still haven't been able to replace that one.

 

[fishslayer]

Its sad that this was your only option due to Stellantis incompetence ..Mine failed but not the bearing noise, it stopped charging. Took 9 weeks of calling customer nonservice to get a replacement MGU. Working fine now tho

 

[KRB3129]

Hi everyone, long time stalker, first time poster. I have the dreaded MGU failure and as of today its been at dealer for 66 days. I am on the fence about pulling it and doing the bearing replacement for one reason. I did not hear any whining or grinding noise with mine. I was driving and the check engine light came on and I had an immediate but subtle loss of power, like 1500rpms, multiple people in the truck did not feel it but as the driver and owner we all know our vehicles. I made a few small trips, around 10 miles each before the battery warning came on. My question is, is it always the bearings going or could I have another problem? I hate to pull it off the dealer lot, get it all torn apart just to find its not the bearings that are bad and then its gotta go back to dealer. Just looking for everyones thoughts. As of now the dealer has no date available

 

[Trooper4]

Hi everyone, long time stalker, first time poster. I have the dreaded MGU failure and as of today its been at dealer for 66 days. I am on the fence about pulling it and doing the bearing replacement for one reason. I did not hear any whining or grinding noise with mine. I was driving and the check engine light came on and I had an immediate but subtle loss of power, like 1500rpms, multiple people in the truck did not feel it but as the driver and owner we all know our vehicles. I made a few small trips, around 10 miles each before the battery warning came on. My question is, is it always the bearings going or could I have another problem? I hate to pull it off the dealer lot, get it all torn apart just to find its not the bearings that are bad and then its gotta go back to dealer. Just looking for everyones thoughts. As of now the dealer has no date available

It could be the windings if there was a bearing failure, but if you heard no indication of the bearing issue, it could be the Hybrid Control Processor (HCP) Module. That is the item on the top of the MGU, and may be able to be found separate from the complete MGU. I have seen the lower generator part separate on E bay, so you might be able to find the controller separately.

The Ram 1500 Hybrid Control Processor (HCP) module is a key computer that manages the eTorque mild-hybrid system in specific models, controlling the Motor-Generator Unit (MGU) and other related functions. It is often updated via software flashes, as recommended in Technical Service Bulletins (TSBs) and recalls, to fix issues such as transmission problems, rough idling, and engine stall. A common procedure for technicians is to use a scan tool to check the current software version and, if necessary, update the HCP and Auxiliary Hybrid Control Processor (AHCP) to the latest version to address reported symptoms.

Pardon Our Interruption...

Google Search

 

[Ed_rtr]

My 2020 has gone to the dreaded dealership Etorque graveyard dropped it off last Tuesday morning (10/21/25) it was grinding so bad you could feel it by putting your hand on the top of the unit . Talked to them today they are supposed to get the replacement in on 11/12/25 what a crap show.

 

[KRB3129]

It could be the windings if there was a bearing failure, but if you heard no indication of the bearing issue, it could be the Hybrid Control Processor (HCP) Module. That is the item on the top of the MGU, and may be able to be found separate from the complete MGU. I have seen the lower generator part separate on E bay, so you might be able to find the controller separately.

The Ram 1500 Hybrid Control Processor (HCP) module is a key computer that manages the eTorque mild-hybrid system in specific models, controlling the Motor-Generator Unit (MGU) and other related functions. It is often updated via software flashes, as recommended in Technical Service Bulletins (TSBs) and recalls, to fix issues such as transmission problems, rough idling, and engine stall. A common procedure for technicians is to use a scan tool to check the current software version and, if necessary, update the HCP and Auxiliary Hybrid Control Processor (AHCP) to the latest version to address reported symptoms.

Pardon Our Interruption...

Google Search

Thanks for the reply, I was on my way down to ask them to pull the MGU and they called saying the new MGU was in. I figured I'd tear it apart and check the bearings and if that wasnt it, well then they would have done half the job.

 

[Trooper4]

Thanks for the reply, I was on my way down to ask them to pull the MGU and they called saying the new MGU was in. I figured I'd tear it apart and check the bearings and if that wasnt it, well then they would have done half the job.

If it's warranty work they will send it to FCA to prove they did the work. Been there, done that.

 

[jag457]

Actually out there

https://parts.mopargenuineparts.com/oem-parts/mopar-engine-generator-kit-68623194ac?c=az0xJnE9Njg2MjMxOTRBQg%3D%3D&origin=pla&gclid=Cj0KCQjw267GBhCSARIsAOjVJ4GYgBMYIuX5BiUi5Y5YiXni6KUd8OLdy2A_MdiwedkMJ7e9STxkn2gaAvDEEALw_wcB

https://parts.moparonlineparts.com/oem-parts/mopar-engine-generator-kit-68623194ac?c=az0xJnE9Njg2MjMxOTRBQg%3D%3D&origin=pla&gclid=Cj0KCQjw267GBhCSARIsAOjVJ4HDB4ieBlzZlOUJukFE_ExqVudf4_4EYvxk_1fsovfFRqoHZo-xggYaAsiFEALw_wcB

Pardon Our Interruption...

Pardon Our Interruption...

I ordered a "new" MGU through this exact site and after ordering, they informed me it is on backorder with no ship date.

 

[Trooper4]

I ordered a "new" MGU through this exact site and after ordering, they informed me it is on backorder with no ship date.

Pretty typical. I saw a few that said "in stock", but who knows. It's all about the money.

 

[Jdurk1984]

Question.
I followed your steps and everything was perfect. Truck sounds great and brand new again. It was my rear bearing as well.
But as it started, the start/stop flashed and said it was off, my battery light automatically came on dropping from around 12.4V to 11.6 and lower sometimes. Also, check engine light came on(i’m assuming from the battery).
Any ideas on why this may have happened or if this happened to you?

These are my exact issues now. Was trying to figure out if it’s the bearing or 24v system. Glad I see. Your comment. I feel more comfortable tearing it out and replacing the bearing.

 

[Buckeye0076]

This was a club I was hoping not to join but here I am.... 2020 etorque 97k miles, whining gave way to grinding and voltage drop yesterday. The grinding noise is pretty ugly and I can feel the vibration with hand on top of the unit. I'm considering having a local mechanic do the bearing replacement but have many here ran into other damage to the unit as a result of the bearing failure? Hoping not to spend $500 to learn I'm going to need to spend another $2k+.

 

[Jawesome86]

This was a club I was hoping not to join but here I am.... 2020 etorque 97k miles, whining gave way to grinding and voltage drop yesterday. The grinding noise is pretty ugly and I can feel the vibration with hand on top of the unit. I'm considering having a local mechanic do the bearing replacement but have many here ran into other damage to the unit as a result of the bearing failure? Hoping not to spend $500 to learn I'm going to need to spend another $2k+.

Replace the rear bearing yourself, easy to do with another person. You won't get access to the front bearing without some major work as referenced by a few here. The bearing replacement solves the issue for some, but others (myself included) have units that won't charge. You won't know until you replace the bearing.

 

[Trooper4]

This was a club I was hoping not to join but here I am.... 2020 etorque 97k miles, whining gave way to grinding and voltage drop yesterday. The grinding noise is pretty ugly and I can feel the vibration with hand on top of the unit. I'm considering having a local mechanic do the bearing replacement but have many here ran into other damage to the unit as a result of the bearing failure? Hoping not to spend $500 to learn I'm going to need to spend another $2k+.

If you have an electrical issue(voltage drop), then you most likely have hit the windings when the bearing let the shaft wobble.

 

[cappynichols]

Like many others with the 5.7 eTorque mine started making a grinding noise. At first it sounded like an old power steering pump without fluid. Then, it progressed into a horrible bad bearing sound. All the while the dealer told me the part was backordered and that I should keep driving it (my truck is under warranty with about 25000 miles on it). Eventually the noise got so bad I told the dealer I couldn't drive it any longer as I was worried about causing other damage or short circuiting and starting a fire. Again, they nor Ram offered any solution so I took matters into my own hands. In the next few posts I will try to spell out how to remove and rebuild the eTorque unit (provided yours failed the same as mine). My truck is a '21. I have no idea if they are all the same. I also have no idea if my repair procedure will cause other damage of any other kind. The risk to attempt repair is yours. This probably voids warranty. My repair was successful and my truck runs fine with no abnormal noises. I apologize ahead of time as the following posts will likely be long. I will try to get them typed up and posted tonight or tomorrow. I joined the forum to hopefully help others that are stuck in the

Like many others with the 5.7 eTorque mine started making a grinding noise. At first it sounded like an old power steering pump without fluid. Then, it progressed into a horrible bad bearing sound. All the while the dealer told me the part was backordered and that I should keep driving it (my truck is under warranty with about 25000 miles on it). Eventually the noise got so bad I told the dealer I couldn't drive it any longer as I was worried about causing other damage or short circuiting and starting a fire. Again, they nor Ram offered any solution so I took matters into my own hands. In the next few posts I will try to spell out how to remove and rebuild the eTorque unit (provided yours failed the same as mine). My truck is a '21. I have no idea if they are all the same. I also have no idea if my repair procedure will cause other damage of any other kind. The risk to attempt repair is yours. This probably voids warranty. My repair was successful and my truck runs fine with no abnormal noises. I apologize ahead of time as the following posts will likely be long. I will try to get them typed up and posted tonight or tomorrow. I joined the forum to hopefully help others that are stuck in the You saved me $1500+

Like many others with the 5.7 eTorque mine started making a grinding noise. At first it sounded like an old power steering pump without fluid. Then, it progressed into a horrible bad bearing sound. All the while the dealer told me the part was backordered and that I should keep driving it (my truck is under warranty with about 25000 miles on it). Eventually the noise got so bad I told the dealer I couldn't drive it any longer as I was worried about causing other damage or short circuiting and starting a fire. Again, they nor Ram offered any solution so I took matters into my own hands. In the next few posts I will try to spell out how to remove and rebuild the eTorque unit (provided yours failed the same as mine). My truck is a '21. I have no idea if they are all the same. I also have no idea if my repair procedure will cause other damage of any other kind. The risk to attempt repair is yours. This probably voids warranty. My repair was successful and my truck runs fine with no abnormal noises. I apologize ahead of time as the following posts will likely be long. I will try to get them typed up and posted tonight or tomorrow. I joined the forum to hopefully help others that are stuck in the same crappy situation.

Thanks for posting this, you're a lifesaver!! My truck has over 100k miles, so the warranty was up on it anyway. Im not a mechanic by any means, but it was fairly easy and only cost me around $60 for the tools needed/bearings. Thanks again for saving me the time, the hassle, and $1500+!!

 

[Ed_rtr]

My 2020 has gone to the dreaded dealership Etorque graveyard dropped it off last Tuesday morning (10/21/25) it was grinding so bad you could feel it by putting your hand on the top of the unit . Talked to them today they are supposed to get the replacement in on 11/12/25 what a crap show.

Well here we are 11/20 and guess what it’s still sitting on the dealership lot and the date for the replacement is now 12/1. I honestly think they have no clue when it will be in. They have the truck listed as Vehicle Off Road to hopefully speed things up. Oh and guess what even though it’s under warranty still no loaner vehicle

 

[Jawesome86]

one of the mopar websites said stallantis has secured a new supplier for the unit, but nothing else. I have a beautiful driveway ornament until then.

 

[thomasray2011]

Question.
I followed your steps and everything was perfect. Truck sounds great and brand new again. It was my rear bearing as well.
But as it started, the start/stop flashed and said it was off, my battery light automatically came on dropping from around 12.4V to 11.6 and lower sometimes. Also, check engine light came on(i’m assuming from the battery).
Any ideas on why this may have happened or if this happened to you?

Did it go away? Or did you pursue something else? I have the start/stop flashing and voltage dropping from 12.4v to 11.6v currently.