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  1. #1
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    1 out of 1 members liked this post. Yes Reputation No

    My Quaife is !@#$ed

    To make a long story short, 9 months ago I made the mistake of buying a used Quaife for my 07 335i AT and now it's shot. Click here to enlarge The passenger side output shaft has about an 1" of play where the shaft connects to the diff which has caused an oil leak.

    Since I know absolutely nothing about diffs, I need to know if having this fixed as simple as buying a new Quaife and having an experienced shop perform the install? Click here to enlarge

  2. #2
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    You mean play like the output shaft slides in and out of the differential carrier? There is a circlip that goes in a groove on the inside end of the output shaft that is supposed to hold the output shaft in place. Is that missing?
    Eppur si muove.

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    Suspect the diff is fine and, as suggested above, instead an issue with your half-shaft.

    Neil

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    1 out of 1 members liked this post. Yes Reputation No
    The play is up and down similar to this video but between 1-2" of up and down play.


  5. #5
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    That video seems to indicate excessively worn bearings. Between 1 and 2 inches of play like as seen in the video indicates the bearing is either completely destroyed, or the splined shaft is broken off from the output flange, where the CV axle bolts to the differential.

    Is there metal in the differential fluid?
    Eppur si muove.

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    I have no idea if there were metal shavings in the oil or not. After 2 days of getting random DTC errors I took the car to my local indy shop. The tech saw oil on my exhaust and proceeded to check the oil in the diff and it was only 1/3rd full. He initially thought the diff just needed new seals but once he discovered the shaft movement he said I would need a new diff.

  7. #7
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    The differential assembly has to come off the car and be opened up regardless, so that is a logical first step. After that it should be very obvious what needs to be replaced.
    Eppur si muove.

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    Quaife has a lifetime warranty if you purchase new.

    http://www.quaifelsd.com/WarrantyTerms.aspx

    I see you said you purchased used so perhaps the person you purchased it from will return it for you...
    Click here to enlarge

    I will quit being rude if you quit being stupid.

  9. #9
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    Quaife is likely to at least help you with you it but yes the warranty is for new products.

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    FML

    Ok the Quaife is fine but the bearings in the diff are toast. Since the bearings are non-serviceable my options are to Pay $2200 plus 6-7 hrs of labor and shipping to have my diff machined and have roller bearings put in. Or find a used non-bolted diff and have my Quaife serviced and installed. Click here to enlarge

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    At least you know what's up though. $#@!ty situation but what can you do?

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    Click here to enlarge Originally Posted by Deadwrong Click here to enlarge
    Ok the Quaife is fine but the bearings in the diff are toast. Since the bearings are non-serviceable my options are to Pay $2200 plus 6-7 hrs of labor and shipping to have my diff machined and have roller bearings put in. Or find a used non-bolted diff and have my Quaife serviced and installed. Click here to enlarge
    What do you mean the bearings are non-serviceable? I know they can be removed from the housing and the diff. Can you not source replacements?
    Eppur si muove.

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    I was under the impression that a Quaife is indestructible. Well hopefully my doesn't give out, but I bought my new.
    Click here to enlarge

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    What is your build date?
    Eppur si muove.

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    04-2007. Apparently BMW doesn't sell the bearings seperately.

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    Click here to enlarge Originally Posted by Deadwrong Click here to enlarge
    04-2007. Apparently BMW doesn't sell the bearings seperately.
    BMW might not sell them, but they do buy them from someone else. In my build data 10/06 car with a bolted diff in a big housing the bearings are made by INA (FAG). Your bearings should have some writing on them telling you the manufacturer and the manufacturer's part number. You should check that out first.
    Eppur si muove.

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    The few bearings I've seen on this car are made by FAG Bearing, including the wheel bearing I just replaced. You can likely source from them.

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    Nevermind I found the answer.

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    Click here to enlarge Originally Posted by Deadwrong Click here to enlarge
    Nevermind I found the answer.
    Which is?

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    Is there any reason I couldn't buy a used pumpking and have the bearings swapped?

    The answer was 135 and 335 use the same differential.

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    Regardless of what you do, make sure you check the backlash in a couple places before you put the cover back on.

    I don't see why talking the bearings from another housing wouldn't work. I would still try to source new bearings first though.
    Eppur si muove.

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    Because typically removing bearings that are friction fit requires force, which, for a ball bearing, will indent the raceways and cause accelerated spalling.

    If I was OP I would have sourced bearings identical in side and a good hardness factor as a safety net. Sounds like he got it sorted out though.

  23. #23
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    0 out of 1 members liked this post. Yes Reputation No
    Click here to enlarge Originally Posted by Tzu Click here to enlarge
    Because typically removing bearings that are friction fit requires force, which, for a ball bearing, will indent the raceways and cause accelerated spalling.

    If I was OP I would have sourced bearings identical in side and a good hardness factor as a safety net. Sounds like he got it sorted out though.
    I'm not saying you don't need to be careful when removing bearings, but the races can be removed without damaging them. These bearings come apart into three pieces (inner race, balls with separator, outer race) as soon as the diff is removed, then you can work on each race independently without needing to do something like pull on the outer race to get the bearing off the differential.
    Eppur si muove.

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    I'm sure some careful hands could do it just fine.

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    Update:

    I was able to find a used carrier but the shop if refusing to remove the bearings from a used diff and will only accept new bearings as replacements. It seems that they are under the impression that the current bearings were damaged during the original install which lead to the issues I am experiencing now. They also claimed that only 2 of the 3 bearings were present in my current diff and that they are unable to see the part#s. I have sent an email to Quaife to see if they have any leads on these bearings, but it appears I might just throw the towel in and just go back to a stock diff.

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