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-   -   Transfer case rebuild NV125. Bearing question. (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/115472-transfer-case-rebuild-nv125-bearing-question.html)

Bmwe5320023.0 10-30-2023 05:32 PM

Transfer case rebuild NV125. Bearing question.
 
So I'm rebuilding the transfer case and filming a video, in case anyone would be interested.

I just got this bearing kit, and the bearing seems different from the original.
https://www.ebay.ca/itm/285416192375...mis&media=COPY

It doesn't look the same.
https://i.ibb.co/0V1h7kc/20231030-070758.jpg
https://i.ibb.co/MgvGsbB/20231030-070802.jpg
https://i.ibb.co/wWCZ1wn/20231030-070807.jpg
https://i.ibb.co/pJBhhZB/20231030-145543.jpg

OEM bearing is SKF, and replacement bearing is Nachi, which I guess is a good company as well.

The bearing number is 6013 but I guess the suffix is just as important.

OEM bearing:
TN9 Glass fibre reinforced PA66 cage, ball centred

Ebay bearing:
C3 Radial internal clearance greater than Normal

For those who know anything about bearings, can I install the bearing I got from eBay? Or should i return the kit and try to obtain exactly identical bearings?

I really don't want to nilly willy install the wrong bearings and have to drop the transfer case another time to redo the job...

Any help highly appreciated!!

X5chemist 10-30-2023 06:00 PM

Interesting. Post how the rebuild goes. The company is down the highway from Austin.

cn90 10-30-2023 06:36 PM

Nachi is an outstanding bearing company.
Nachi bearings are inside many Volvos...

Bmwe5320023.0 10-31-2023 05:09 AM

I was only concerned by the different suffix rather than the company.
https://www.skf.com/in/products/roll...gnation-system

It seems all these designations mean something, and I'm not sure if they'd be any issues, for example C3 - clearance greater than normal.

I took apart the old skf bearing, and saw that the balls are held by a plastic round clip, that's why the bearing looked closed or sealed at first sight, and looks different.
The nachi bearing has the balls centered in a metal clip on both sides. Maybe it's even better.
The nachi bearing spins a lot longer by hand, that's for sure. It's also a lot louder, but maybe that won't be noticeable when it's swimming in transmission fluid...


I https://i.ibb.co/jfbnpxv/20231031-021355.jpg
https://i.ibb.co/Z8X4RSB/20231031-021401.jpg

tempest411 10-31-2023 12:08 PM

The OE bearings in my LWX500 case were C3 bearings, so I think you'll be fine.

Bmwe5320023.0 10-31-2023 04:33 PM

Thanks for the info, I'll use it then.

Was trying to change the output flange seal and ended up cracking the case lol.
https://i.ibb.co/MyvgyXB/20231031-121001.jpg
remove duplicate email addresses

Didn't know how to remove the gear so tried pressing it out. Turns out there's 2 circlips on each side of the bearing. So looked like I should've removed the seal first, then the smaller circlip, and then presses out the gear/nearing.

Now will need to go to junkyard to pull another TC.
What a pisa lol...

racebmwm3 10-31-2023 06:21 PM

Oh shit. Not good.
Subscribed.

cn90 11-01-2023 03:24 PM

On YouTube, there is a nice video on BMW TC rebuild.
You may want to watch that first prevent all these mishaps.

Bmwe5320023.0 11-01-2023 04:36 PM

Do you have a link? I couldn't find a single video where the output flange side was removed.

Henn28 11-01-2023 05:06 PM

Subscribed! A chain replacement is on my longer term list, but I could just buy an eBay t-case and do a full rebuild thanks to these threads and videos.


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