eTorque Bearing Replacement, Fixed Grinding Noise

[Trooper4]

Did it go away? Or did you pursue something else? I have the start/stop flashing and voltage dropping from 1

Either the MGU electric control on top, or if you lost the bearing, it wobbled and damaged the windings.

 

[thomasray2011]

Either the MGU electric control on top, or if you lost the bearing, it wobbled and damaged the windings

Bearing was definitely the initial issue. Can the resolver be acquired?

 

[RHO]

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.

IF we or you can go into the MGU and replace the bearing that failed wonder why the dealer just dont try that ? seems you can get a bearing for it faster then the Mgu unit.

 

[Trooper4]

Bearing was definitely the initial issue. Can the resolver be acquired?

I fount the # and manufacturer, but got no response from them. I think that they pretty much only deal in very large quantities and end product builders. I have seen some MGU units without the electronics attached through Ebay junk yards, but most are light duty for the v6. A used doner if you can find one for a reasonable price is hard to find. It could also be the box on top that is the electrical controller.

 

[Nonducor]

This is how far I've gotten with the front bearing but presently stuck. My mechanical know-how and tools are limited and I haven't been able to separate the shaft and bearing from the housing.
Any one else successfully replace the front bearing and able to post the steps taken?

 

[chrislizyness]

Good afternoon. My 2020 1500 5.7 limited has the dreaded mgu. It recently started making a noticeable whining sound that is most evident at 1500 ram or so. My co sole is still showing 14v for charging at the moment. Im curious what the bearing are for both for the 2020 before I brake this open. I haven't went to the dealer as they are useless. The truck is at 98k milage. I have access to press and whatnot at work. Thanks in advance

 

[Anchor Down]

Excellent write up. Hope I never need the information, but as the eTorque MGU gets older this is gonna be more common to repair a bearing that goes bad.
Where did you get the bearing part number? Parts book or off of the bearing?

I'm nominating this stud for the Presidential Medal of Freedom!

 

[Trooper4]

Good afternoon. My 2020 1500 5.7 limited has the dreaded mgu. It recently started making a noticeable whining sound that is most evident at 1500 ram or so. My co sole is still showing 14v for charging at the moment. Im curious what the bearing are for both for the 2020 before I brake this open. I haven't went to the dealer as they are useless. The truck is at 98k milage. I have access to press and whatnot at work. Thanks in advance

Is it at all rpm's, even idle, and does it increase in frequency with rpms? Does it growl at idle? If it is intermittent, it could be the MGU electrical regulator is out of phase. The MGU is a three phase generator. It could also be a tensor or idler pully bearing.

 

[chrislizyness]

Is it at all rpm's, even idle, and does it increase in frequency with rpms? Does it growl at idle? If it is intermittent, it could be the MGU electrical regulator is out of phase. The MGU is a three phase generator. It could also be a tensor or idler pully bearing.

It is at all rpms. I can pick up the pitch more at idle or 1500 range however.

 

[chrislizyness]

I'm nominating this stud for the Presidential Medal of Freedom!

Not sure if that was supposed to show the numbers. Suppose I'll have to go digging

 

[TACAMO85]

I fount the # and manufacturer, but got no response from them. I think that they pretty much only deal in very large quantities and end product builders. I have seen some MGU units without the electronics attached through Ebay junk yards, but most are light duty for the v6. A used doner if you can find one for a reasonable price is hard to find. It could also be the box on top that is the electrical controller.

Did you ever find a resolver? I’ve contacted the mfg. I’m waiting for a response. Told them I would buy a few. I could probably start a business overhauling these MGUs. Here’s my resolver:

 

[Trooper4]

Did you ever find a resolver? I’ve contacted the mfg. I’m waiting for a response. Told them I would buy a few. I could probably start a business overhauling these MGUs. Here’s my resolver:

I never heard back from them. Crickets

 

[Jawesome86]

I'm finding it funny and suspicious how online mopar sites are showing the MGU's in stock at the same time new ebay listings go up for $3K. Then when you order the MGU from the site, they are out of stock. They way these online inventories work is they scan the shipments they receive in and they automatically update.

 

[TACAMO85]

I never heard back from them. Crickets

Thanks for the feedback. Here is a screenshot of the reply I got from the manufacturer. I wonder if the resolver in the Cherokee MGU is the same part number. If it is, maybe that’s an option to canibalize it from

 

[LV426]

Anyone have any statistics on the failure rate of these MGU's? Contributing factors, (hot/cold) climates, heavy use, light use, etc....?

It's hard for me to comprehend that Ram/Stellantis would allow this part to be difficult to acquire considering how sensitive it appears to be. To me it seems like all that ****ing gas money you "saved" will go to replacing this stupid thing...

Personally, i'm starting to consider getting rid of the damn truck because if it does fail I don't want to have to deal with it.

 

[Trooper4]

Anyone have any statistics on the failure rate of these MGU's? Contributing factors, (hot/cold) climates, heavy use, light use, etc....?

It's hard for me to comprehend that Ram/Stellantis would allow this part to be difficult to acquire considering how sensitive it appears to be. To me it seems like all that ****ing gas money you "saved" will go to replacing this stupid thing...

Personally, i'm starting to consider getting rid of the damn truck because if it does fail I don't want to have to deal with it.

AAAHHH yes. Throw the baby pot with the bath water. Saves changing diapers I guess.

 

[Errortype11kid]

Hey all.

Just wanted to say I just finished up on a 2019 ram at 96K. UpNorths directions were spot on, we all owe him.

Couple things I noticed: my whine started about two weeks ago and I got on it. No marks on resolver or any loss of voltage before, so I think that’s your sweet spot to complete it.

I was shocked at how smooth the MGU spun even with the bad bearing on it. I debated “Am I doing the right thing?” But forced myself to go through with it. Once I got it open, bearing felt like it had pebbles in it.

Finally the plastic clips on my electrical connects, it was almost un-avoidable breaking them. Heat cycles and the elements made them snap when essentially sneezing at them, but everything snugged up Nicely.

Finally, getting the thing out, pardon my French, is a giant pain in the ***. That will be the hardest part of the whole thing.

Up north, you’re a life saver.

 

[jeffro2011]

My mgu unit just started grinding and I took it to the dealership and they agreed the mgu unit was bad and under warranty. They told me could be up to 6months until part comes in. I go on mopars website and the MGU units appear in stock. I called and told
Dealership that and they didn’t have an answer. They told me I should be fine to drive truck around until the part comes in. I’m nervous to go couple hours out of town as I don’t want to get stranded. They told me to just watch the battery charge gauge and a light would pop on if it wasn’t charging anymore. I’m wondering if if I should just buy my own MGU unit and once the new one comes I will have a spare as I plan on keeping the truck for another ten years anyhow.

 

[Trooper4]

My mgu unit just started grinding and I took it to the dealership and they agreed the mgu unit was bad and under warranty. They told me could be up to 6months until part comes in. I go on mopars website and the MGU units appear in stock. I called and told
Dealership that and they didn’t have an answer. They told me I should be fine to drive truck around until the part comes in. I’m nervous to go couple hours out of town as I don’t want to get stranded. They told me to just watch the battery charge gauge and a light would pop on if it wasn’t charging anymore. I’m wondering if if I should just buy my own MGU unit and once the new one comes I will have a spare as I plan on keeping the truck for another ten years anyhow.

that's crazy. The control unit on top of my MGU has been making an intermittent noise (not a bearing growl) fore some time now, so took it in last Monday, and got a call this Monday that it came in on the weekend shipment. Another customer was waiting, and had been for a month. I guess I'm just special, but it depends what supply point they are getting them from. I plan on keeping the unit and paying the core charge. I have a new set of bearings, and although it doesn't need them yet, I will replace them. I might hang onto it and change it out with the electrical controller on the new one if it dies, or I might sell it.
But like you said, they are out there, and it cost me $1600 for this one plus install and taxes.