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I honestly have no idea. I did try getting the front pulley off to take a look, but it didn’t want to budge. Since I had already found the issue I didn’t pursue getting to the front bearings. I would suspect it is larger due to the shaft size. I only replaced the rear bearing.

That is certainly a risk. I did have it at the dealer prior to fixing it myself and they identified the MGU as being bad. After almost two months waiting and no ETA on parts I told them I was going to proceed with rebuilding the unit. I need my truck and saw no reason to lie to the dealer. We’ll...

I posted the write up in a new thread, eTorque Bearing Replacement, Fixed Grinding Noise. Hopefully it is helpful.

The bearing was too corroded to read. So I used a micrometer and bore mic to measure the shaft, bore, and thickness. Then cross referenced it to the industry standard size. It is a very common size bearing.

Install back in the truck is reverse of removal. Again, I do not know what torque requirements are for the bolts. I went by feel. 4 bolts on the front of the MGU and one on the drivers side. Then connect the 48V connection, take caution as it is LIVE, followed by connecting the harness on...

In my unit the bad bearing was an SKF 6003 double sealed bearing. I was not able to read the bearing part number due to corrosion but I measured the shaft at 17mm, bearing OD at 35mm, and thickness at 10mm. This is a 6003 size bearing and it is double sealed. I have no idea what precision...

Now that the cases are split we see the issue. The rear bearing is shot. 3. Behind that rear bearing is a resolver of some kind (my guess is it reports shaft position/rpm to the controller). It needs to be removed to get the bearing off. It is a single nut that is easily removed with a...

Now the fun part, split the cases. 1. There are 4 long torx bolts that hold the case together. Also, there are no "keys" that align the two halves of the cases together. I highly recommend that you carefully mark both halves before splitting them. Remove the four long bolts. 2. To split the...

Once the MGU is removed, you need to get the electronics module off the top of the MGU. 1. There is a black plastic cover on the rear of the MGU. 4 small torx bolts hold the cover on. Remove them and the cover. 2. You will see 3 large copper bus bar connections to the electronic module...

eTorque MGu removal, 5.7hemi. There are some youtube videos that show this pretty well. 1. Most instructions say to disconnect the 12V battery lead. I did not. Up to you to risk this or not. Treat all connections as if they are LIVE. 2. There are 2 belt tensioners on the MGU belt system...

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...

Will do. I didn't want to write it up on my phone, but will try to type out how I did it. I will start a new thread on Etorque bearing replacement.

I’m in the same boat as others on this thread, dead MGU with no eta on replacement. Yes, I pulled and split the MGU and replaced the bad bearing. In my case it was the rear bearing (6003 double sealed bearing). Damage was caused to the resolver by excess shaft orbiting but the unit is now...