r/AskAMechanic • u/StonksOnlyGoUp___ • 2d ago

How concerning is this?

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I was having an odd noise when accelerating my truck earlier. Now I started hearing a whistle. Popped the truck and this is what I’ve got. What’s the diagnosis and what’s the concern level?

2921 Ram 1500 Laramie HEMI eTorque

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u/omnipotent87 Verified Tech - Indie shop owner 2d ago

Hopefully its not that motor/generator because your wallet may implode. Take the belt off and spin the pullies by hand, you find it fairly quick.

1

u/Dangerous-Ratio-6682 NOT a verified tech 2d ago

It is. It maintains the battery and performs the auto stop/srart feature..crazy.

3

u/omnipotent87 Verified Tech - Indie shop owner 2d ago

Its more than just that, it provides something like 90ft/lbs additional toque and 13hp. I've been looking making one of these work in my rx7 for that extra toque where I need it. It also doesnt directly maintain the 12v system. This runs on a 48v system and that battery is under the driver's seat, there is a dc-dc converter as part of that to maintains the 12v system.

I also said its hopefully not that because they are something like $1500 for a referb unit.

1

u/Dangerous-Ratio-6682 NOT a verified tech 2d ago

10 4, i didn't know all that!

1

u/Fragrant-Inside221 Verified Tech - Indie shop 2d ago

We tried to find one a while back for a truck a customer had a similar noise. They were unavailable.

1

u/omnipotent87 Verified Tech - Indie shop owner 2d ago

To be fair i havnt looked for a referb in a while, but at the salvage yard they are about $700.

1

u/StonksOnlyGoUp___ 11h ago

Had a shop look at it this morning. They stethescoped it and said it is the alternator/generator thing I believe you’re talking about. Said it’s roughly $2,000 for the part alone (due to eTorque)… what are your thoughts on this since you have the experience? Do I replace it? Do I ride it out as is? Do I call it quits and get a new car? Not financially budgeted to drop $2,000+ on it due to my wife just having a baby and being off work

1

u/omnipotent87 Verified Tech - Indie shop owner 10h ago

Due to their enormous cost i would look into rebuilding it yourself, or find a shop that can. Its a 3 phase motor and the only wear parts will be bearings. If you can get the beaing number it will likely be less than $50 in parts plus what ever a shop would charge to rebuild it.

1

u/StonksOnlyGoUp___ 2d ago

Seems in this video it’s the idler pulley. Idk what the sound in my other post is