Rear Hub Wiggle/Movement

[Mat1asBEV&ICE]

Hi everyone. Is this amount of rear hub movement normal? Both my right and left are doing it so I'm guessing it's normal. Discovered this while putting on the lugs.

Thank you!

https://youtube.com/shorts/GXFV6exwhyM?feature=share

https://youtube.com/shorts/8xG-eW5AmGg?feature=share

[Pmieras]

Not normal. Looks like the bearing to toast. Would probably howl like a banshee, get hot, alignment issues, etc

[edwardb]

I don't recall mine doing that. If they did, didn't notice. Maybe once the CV axle is installed and the axle nut torqued it changes? Are those new parts?

[Mastertech5]

Put the axles in and torque them before you decide they're trash. The 2 bearings that are in each one may have separated slightly while putting the studs in. If still loose after that they are junk. There should be no play when assembled.

[Mat1asBEV&ICE]

Yes, they are new parts from FFR. Thank you for your feedback, I will install the CV axles are report back. Logically, I thought there's no way these should have play but I thought the chances of both being bad are quite small.

[ggunter]

There should be no movement.

[OB6]

Are they Motorcraft/Ford parts? Mine are Ford OEM parts (purchased by me separately) and there is zero movement like that. My guess would be that FFR is supplying Mevotech units or similar, like they supply with the front hubs. Lots of people use Mevotechs with good success, but they're not OEM.

Side note, I replaced my FFR-supplied front hubs (Mevotech) with SKF's due to the same type of movement, and because they fell apart during install. The SKF's were noticeably better built.

There is a ton of variability with these hub/bearing assemblies based on my experience replacing them on other cars.

[DW66]

Were they that loose before you removed the original studs? Did you support the back of the hub when removing the original studs?

Dave

[Mat1asBEV&ICE]

I’ll have to check the parts tomorrow when I’m in the garage (building off site).

I did support the hub but I’m not sure if they moved like that from the start. I noticed about half way through lug installation.

[rich grsc]

Bet you loosened the bearing when installing the studs. Inserting the axles and torquing then down should solve the issue.

[CraigS]

Bet you loosened the bearing when installing the studs. Inserting the axles and torquing then down should solve the issue.

I agree 100%.

[Mat1asBEV&ICE]

I have been putting this off hoping FFR tech would respond to me. But I find myself repeatedly following up with them or they answer the wrong question.

I'm going to torque down the axles (hopefully) tomorrow. If the hubs are bad, what year and Mustang model parts do I need (IRS setup)? Thank you gents.

[jamminj]

there is nothing wrong don't panic.
i thought the same thing when my set was wiggling in my hand.
but i called cortex racing when I thought I needed a new set and they said they run these factory hubs in their race cars, and they are bullet proof.
The hubs absolutely come apart when they are not tightened up to the axle.
I took one set apart by threading long bolts onto the ears that connect the hubs to the knuckles so I could look at the way they are constructed.
you can hit them with a mallet, and they will start to come apart. when you start fooling around with them, they can work their way loose.

I have 3 complete sets of hubs all have less than 12000 miles on them.
don't waste your money on a new set.

[BRRT]

If needed, 2015-2022 Mustang GT
https://www.summitracing.com/parts/mof-hub352/make/ford/model/mustang/year/2019
Not cheap

[rvanstory]

I had the same thing happen when changing the lug nuts out. The hub just loosened slightly from the bearings. Since it's not installed yet, you can also place the hub back side down on a solid plate (I used a bench vice), then use a large socket to go inside the hub face, and "tap" it back into place. This will take out the play prior to installing the CV axles.

[Mat1asBEV&ICE]

Hello. I just wanted to close a loop on this as I had a question about it, once I tightened the axle nut everything was good. So perhaps that kind of movement is normal before it’s tightened down.

[jengum]

I noticed a similar amount of play in the hubs when removing and re-installing the lug nut studs. The play disappeared after initial torquing of the CV axle nut to the 98 ft lbs described in the build manual. Still need to do the CV axle nut final torque as a followup item.

[CraigS]

Yes, w/o the axle you have the two inner races just sitting in there not really retained by much at all. Once you stick the axle through and tighten the nut, the inner races are pulled tightly together. The machining is set so the ball bearings are given a slight preload at the same time.
https://www.bing.com/images/search?view=detailV2&ccid=U6o2UWGC&id=2D839F302EC561F4073BDDF207D9AAD108F5D910&thid=OIP.U6o2UWGCImSlnS0LJErDpwHaGI&mediaurl=https%3A%2F%2Fen.tradebearings.com%2Fmode l%2Fimages%2Fab-1036.jpg&cdnurl=https%3A%2F%2Fth.bing.com%2Fth%2Fid%2FR.53a a365161822264a59d2d0b244ac3a7%3Frik%3DENn1CNGq2Qfy 3Q%26pid%3DImgRaw%26r%3D0&exph=404&expw=488&q=ball+bearing+drawing+for+automotive+hub&FORM=IRPRST&ck=81D2DA5DD543C3564509B57A4E3D8F5A&selectedIndex=88&itb=0&cw=1229&ch=613&ajaxhist=0&ajaxserp=0
This drawing is representative. They don't make it real obvious but the inner race is actually 2 parts. These are what get pulled together when tightening the axle nut.