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Thread: Borg Warner centre diff.

  1. #1
    Join Date
    Mar 2011
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    Unhappy Borg Warner centre diff.

    Does anyone have any idea what is the most common problems/failures with this Borg Warner V/C device, we have one fitted along with the VM diesel ex an '88 RRC to an '85 County.
    The vehicle has stripped a front hub drive adapter (axle/hub) and since the adapter has been renewed it is giving the appearance of fully locked up (or mostly at least) in 4WD, i.e. same as trying to drive a manual lock CDL on the bitumen, is it common for a fully locked failure, I thought it may be more a case of slippage and failure to 4WD, we have no workshop manual as yet but have someone who can loan us one.

  2. #2
    Join Date
    Jan 1970
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    Viscous couplings generally lock when they fail.
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1976 Jaguar XJ12C
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

  3. #3
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    Easy to fix it. Take off the front output housing, press out the old VC, press in the new one, and new gasket goo to make a seal when you put the housing back on. bout 3 hours.

    VC's are expecive though.

  4. #4
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    Yes it is a seized VC. $700 from UK Ashcrofts.

    The other common failures are the rear output shaft at 160-200KK , which is GBP80 in UK .Good idea to replace it as a precaution as a seized VC will cause the output shaft to fail quickly and you lose all drive.

    The chain does not seem to go much in RRC but is the most common failure in 38A fro some reason.
    Have a search for BW output shaft as I have posted some photos.
    Regards Philip A

  5. #5
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    Lots of discussion on these about a year or so back, search should find plenty of info. Apparently the VC is filled with a silicon goo that thickens with heat, if overheated it becomes nearly solid and stays that way, hence the lockup. Don't confuse the VC with the centre diff, you have both!~ The VC is like an appendage to the centre diff that limits differential action.
    Definitely replace the shaft as Philip suggested as this is a common failure point that, unlike a locked VC, will leave you stranded. Ask me how I know...

  6. #6
    Join Date
    Oct 2011
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    Gazza, (AND anyone who can assist!!) Re Borg Warner VC Failure.
    Do you think it would be a smart move to replace the new DRIVE FLANGE (which I just put on!) with the OLD stripped Front Drive Flange?
    I'm not going to use 4wd going back to Cooktown anyway, this would take any stresses of the VC until I can get a replacement.

    LandRover:- the grown mans meccano set.

  7. #7
    Join Date
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    Has your VC failed ? (Locked up solid) - If so, then you are heading for heaps of $$$ if you don't take action... *

    Mine has failed, and until I put another on, I've removed the FRONT prop shaft and now it's a REAR -wheel drive 'Classic' .
    This appears to be a do-able workaround. Mine has been like it for around 20,000km. No stress on the centre-diff or chain. Just don't do burn-outs etc as ALL your drive is going via the rear axle, not 50% as designed.

    If the VC had failed in the (safe) 'unlocked' mode, you would never know until you were deep into severe 4WD conditions. The only damage would be your red face.


    * - Your front tyres will wear terribly, turning circle will match the Queen Mary, front CV's will chew out, diffs F & R will be unhappy, as will be uni joints etc.
    Your cat will get in the car and run over your dog....

  8. #8
    mike 90 RR Guest
    Quote Originally Posted by dick180641 View Post
    I'm not going to use 4wd going back to Cooktown anyway
    Sounds as tho your away from home ......

    For as long as your VC is locked ... It WILL constantly and quickly break driveline parts.

    If all your trying to do is get your ride back to base (home) ...
    !: Remove the front tailshaft .. (propshaft)
    2: Wheel align the front tyres, 1 degree-Toe IN (the front end is currently set @ Toe-OUT)

    When you get home ...park it up and get a new VC

    BTW ... It just takes 1 jack and less than 2 minutes of time, to check for a stuffed VC .... No special tools required


    Cheers
    Mike

  9. #9
    Join Date
    Mar 2011
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    Cool Possibilities?

    Thanks all, sounds as if, as Dick and I thought, the V/C has failed, as you all say, in the "locked up" condition, so is the following a possibility?
    As the RR VM engine trans and V/C transfer case is fitted into an '85 County and we still have the original County LT77? (not sure) gearbox and transfer case along with the original V8 sitting in the workshop, is it possible to slip the original old manual engage transfer case from the original County gearbox onto the rear of the RR classic manual trans. We already know that the gearboxes are different at the bell-housing end and the original box will not bolt up to the RR VM diesel but is this fix a possibility, would anyone know.
    As old guys we have more time than currency so if there is a way to avoid the cost of a re-build of the V/C transfer case it would be great, and Dick has plenty of old Landy parts under the house. He is on his way back home without the front axle drive.

  10. #10
    Join Date
    Oct 2011
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    Mike,
    Can you go thru and explain the procedure (after jacking up the front wheels!) of testing the condition of the V/C. I'm pretty sure its 'cactus', but just to confirm it before I start pulling transfer cases out and ordering new V/C's.
    As Gazby noted:- I'd rather just put my original manual transfer case onto the back of the 5 speed gearbox than fix the Borg Auto.. many thanks.

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