[HiredGun]

Could someone tell me if the "RMFD" in this line item on my service ticket stands for "Remanufactured"?

1 33-10-7-566-180 RMFD Final Drive:

This is the part page for RealOEM:

http://www.realoem.com/bmw/showparts...50&hg=33&fg=05

It seems that a RMFD is the only part listed.

[1QuikWS6]

Yes

They clean the housings, assemble with all new parts where needed - should have the same warranty, but I'm not 100% on that...

[HiredGun]

I posted about my differential woes in another thread, so I won't go into any details.

So this means that my brand new 2011 328 with 2000 miles has a remanufactured differential. Should I be concerned about this?

[1QuikWS6]

So you already needed a new diff in a 2011 with 2000 miles?

Could be you have remanuf - what does your service receipt show as the part number(s) installed?

IDK what BMW policy is as to replacement parts in this category. At any rate, whether brand spankin new or reman - you are still under warranty & if the replacement goes bad - they'll replace it again (although it will be an inconvenience to you obviously).

Also, depending on whether your 2011 diff is a new/different design than what has been previously used - there wouldn't be any reman units out there available - hence you got factory new.

I have found that normally reman units have some sort of additional stamping or serial # to denote that it is reman on the actual unit itself (regardless of what the service receipt may say).

Like I stated, reman is not necessarily bad, prolly all they re-use is the case (which is thoroughly cleaned/bead blasted) any wear parts, seals, etc would be replaced with new factory parts - and depending on who does the reman - would be assembled by BMW also.

[HiredGun]

Originally Posted by 1QuikWS6

So you already needed a new diff in a 2011 with 2000 miles?

Can you believe it? The new one was whining like crazy; very irritating.

Originally Posted by 1QuikWS6

Could be you have remanuf - what does your service receipt show as the part number(s) installed?

This is the part number: 33-10-7-566-180

I stopped in at my local dealer (not the one that did the repair) and he confirmed that this part is remanufactured.

I had inquired with my sales advisor before the repair and he advised me that only new parts are used for these repairs. I would have made a request to replace the car before the repair had I known a remanufactured part would be used. This is making me mad just talking about it.

[1QuikWS6]

Part Cross-reference
RealOEM.com Home

Part 33107566180 (Rmfd final drive) was found on the following vehicles:

E90: Details on E90
E90 325i Sedan
E90 328i Sedan


E90N: Details on E90N
E90N 328i Sedan


E91: Details on E91
E91 328i Touring


E91N: Details on E91N
E91N 328i Touring


E92: Details on E92
E92 328i Coupe


E92N: Details on E92N
E92N 328i Coupe

[tscdennab]

I don't think there is a quality difference between new and remanufactured BMW parts. I figure that they only use the non-wearable parts from the old part (eg. a housing) and replace all the wearable parts with new ones.

[dtc100]

Note to self, if all possible live with the BMW whine rather than trying to get rid of it.








Scratch that, already live with a woman.

[viperssd]

I don't think I would be ok with remanufactured parts being installed under warranty...
Sorry to hear for your troubles buddy

[HiredGun]

Originally Posted by dtc100

Note to self, if all possible live with the BMW whine rather than trying to get rid of it.



Scratch that, already live with a woman.

This is funny, but sorta true....

[ENINTY]

Originally Posted by tscdennab

I don't think there is a quality difference between new and remanufactured BMW parts. I figure that they only use the non-wearable parts from the old part (eg. a housing) and replace all the wearable parts with new ones.

I'd say the remanufactured diff is actually better than a new one because the remanufactured diff is basically hand-built and hand-inspected, where as the factory built diff is not.

[Xwahoo]

Don't know if this is relevant (prob not ) but I'm pretty sure I got a remanufactured hpfp a few weeks ago when my original one failed. It was a warranty replacement, of course.

[F32Fleet]

As you know the housings don't wear out so when BMW does a replacement of this type of part it mostly likely will NOT be new therefore it has to be sold as remanufactured eventhough the internals are new.

The same goes for the transmissions.

No worries.

[driverman]

I don't want to hijack your thread, but this raises another question...

Can those of us with 6MT replace our diff (3.23) with the AT diff (3.73) to get significantly more torque (15%) to the drive wheels? Will the AT diff bolt right in?

[MisterSkiMask]

Originally Posted by ENINTY

I'd say the remanufactured diff is actually better than a new one because the remanufactured diff is basically hand-built and hand-inspected, where as the factory built diff is not.

+1

They don't take chances with reman. parts, everything inside is new, and inspected.

I have purchased many reman. tools (elec. and air) for work all have been great. You can't tell a new part from a reman part if they are sitting side by side.

[HiredGun]

Originally Posted by ENINTY

I'd say the remanufactured diff is actually better than a new one because the remanufactured diff is basically hand-built and hand-inspected, where as the factory built diff is not.

I've asserted in my other post that more than one e90 differential has the whine problem and that it could ("could" implies some probability albeit a small one) problem with the differential setup (i.e preload) on new final drives. Perhaps, then, Eninty's and Mister's points are very valid in that a hand built, hand setup diff could be ensured to have the proper setup.? Are preload settings and ring and pinion settings set on the bench or on the vehicle?

Note that I may be totally off base here as I have never worked on differential.

[1QuikWS6]

All differentials are hand built by someone. IDK how BMW production lines run, but most have sub components such as these already built somewhere else and supplied to the line preassembled.

So whether BMW actually builds them - or they are subcontracted out to another company - they are handbuilt somewhere, even the original factory pieces...

I've had the rear diff in my T/A rebulit several times for gear changes and bearing changes by a reputable shop. Never worried that the quality would be less than as came from factory. Actually, in my case, I expected the rebuilt rear to be much better than the mass assembled factory setup. Especially since I personally know the mechanics expertise, his rep & deal with him one on one.

I still say that the reman diffs (if done by quality company) are just as good as original. They reuse the case and any other parts that are in spec - replace any that are not. In most cases, if the units are not identified outwardly in any way, you would not know that they didn't put in a brand spankin new factory part.

[Hulley]

I work for a BMW "stealership,lol" and any component that has a core charge will have the description of RMFD. We just replaced a diff on a FO2 and that diff came in RMFD. It may or may not actually be a rebuilt unit, and yes it will have the same warranty. Also goes for the HPFP pumps.

[Hulley]

Originally Posted by driverman

I don't want to hijack your thread, but this raises another question...

Can those of us with 6MT replace our diff (3.23) with the AT diff (3.73) to get significantly more torque (15%) to the drive wheels? Will the AT diff bolt right in?

Yes you can, I did this on a 3er that I autoX.

[dtc100]

Originally Posted by Hulley

Yes you can, I did this on a 3er that I autoX.

How about using the 335 AT diff on the 328 AT? I thought the 335 diff has higher gear ratios?

[Hulley]

I havent done it on a e9xx but I have on e30, e36 and e46. The axel carrier is the same for all e9xx. so I would "assume" you could use any diff from the same chassis. There are some differences in axles but it looks to be shaft diameter. I may have spoke too soon, but I'd be willing to bet you could use any diff from another e9xx, save the "Xi" models

[Hulley]

Doing a little research just now (I should be working) and the output drive flange is the same on all engine e9xx models so I would think you'd have no problem mounting the drive axels to the diff, whichever diff you chose.