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Thread: DIF whining

  1. #1
    SOC Member mal fitz's Avatar
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    DIF whining

    Looking for good replacement original MK 2 auto dif, failing getting replacement can anyone recommend someone to recon?

    Assuming I need to change! Noise occurs around 60 Mph under load! Is it the dif gearing or just bearings?.
    Mal
    77 TRV8 All original

  2. #2
    SOC Member Niss's Avatar
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    I am a newbie but have been told that even a recondidtioned one can whine. It appears to be a common problem, I have it too. I have been wondering about fitting a limited slip diff but they are not cheap.

  3. #3
    Taking it slow in 2017 mole42's Avatar
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    It is unfortunate that we seem to have lost all the experienced diff rebuilders in the United Kingdom. I have an on-going problem with mine.
    I have been told that Paddocks have some rebuilt diffs with new CW&P which are quiet.
    There's also EJ Wards who apparently have new CW&P (which they famously didn't fit on the Trans-America Stag) but I hear they are even less cheap.
    Mabel is a white 1972 Mk1, TV8, ZF 4HP-22 auto,
    2016 RBRR finisher.

  4. #4
    stag8manod
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    Hi Mal, If you are considering a diff' change how about a 3.45 from a 2.5 Mk2 S saloon or estate to improve the overall gearing. Just a thought.
    Cheers Ian A

  5. #5
    SOC Member mal fitz's Avatar
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    Quote Originally Posted by stag8manod View Post
    Hi Mal, If you are considering a diff' change how about a 3.45 from a 2.5 Mk2 S saloon or estate to improve the overall gearing. Just a thought.
    Cheers Ian A
    Yeah, good call, I'll have a look round, cheers
    77 TRV8 All original

  6. #6
    Permanently Banned User
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    Quote Originally Posted by stag8manod View Post
    Hi Mal, If you are considering a diff' change how about a 3.45 from a 2.5 Mk2 S saloon or estate to improve the overall gearing. Just a thought.
    Cheers Ian A
    !!
    What and lose out on acceleration? IMHO part of the pleasure of driving a Stag and vital for survival on UK roads. Driving in NZ is a pleasure in itself but since the national speed limit is 100kph (62mph) I cannot really see the point of upping the ratios there let alone here.

    For higher ratios without compromising performance then the MOD does this as standard - otherwise the ZF 4 speed autobox swap I believe does something similar.

    H

  7. #7
    Retired, and loving it...... DJT's Avatar
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    3.45:1 diff and ZF 4-speed. Still surprises many moderns at the traffic light Grand Prix.
    Dave
    1974 Mk2, Carmine, ZF 4HP22 Auto, 3.45 Diff, Datsun Driveshafts.

  8. #8
    SOC Member
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    Niss.
    A limited slip diff will still need a good/silent Stag crown wheel and pinion, if you are thinking have one assembled in your Stag housing, ready to fit. It is only the "Differential" gears that are replaced with a locking system in a limited slip version.
    Mike.

  9. #9
    International Members down_the_plug_hole's Avatar
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    Quote Originally Posted by Niss View Post
    I am a newbie but have been told that even a recondidtioned one can whine.

    It's because the new crown and pinions are SH..T!


    Here's what some muppet tried to do in France with one.****_repro_crownwheel_2555.jpg
    ..actually succeeded in getting pinion height 1mm out ...yes 40 thou!!! I could scarcely believe my eyes!!

    OEM v NEW crap

    Crap
    repro_kk_2559.jpg
    OEM
    oem_pinion_2560.jpg

    See!
    oem_v_repro_2554.jpg

    oem_v_repro_2558.jpg

    These are the TR4A ones, which are already horrible, note how the hardening has gone through with the misalignment in about 1500kms.

    I had to replace the entire internals on this one, and deliver personally to the south of France.

    The stag ones are just plain rubbish.

  10. #10
    SOC Member richardthestag's Avatar
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    we should change the title to Down the plug ole whining

    come on geeza, we all know everything on the stag is sh...t you keep telling us :P

    why not contribute to how OP might fix his whining diff rather than telling us everything is sh..t? eh?

    Back to OP
    The diff nose bearing does have a habit of chewing out bearings, I had a poor quality supply issue years ago, they only lasted maybe a few thousand miles before they started to growl again.

    If the diff is coming off anyway, take a look into the diff nose housing around the quill shaft, if there is a build up of wet grease then the bearing may have failed. easy enough to replace once the diff is out anyway.

    Setting up a diff with new crownwheel etc is a faff and specialist job, folk who used to do this seem to have gone the same way as the autobox specialists. as stuff in the marketplace becomes less rubbish (eh DTPH ) demand for specialists becomes less so and the shut up shop. Paradoxically folk who now need this service have to pay those specialists more to do the job proper

    Options would seem to be
    1. change fluid and live with it
    2. search out a quiet "er" diff second hand, they do exist. I had an auto diff in my garage until a few years ago. sold it though when I went Man O/D
    3. pay EJWard etc good money for a good diff
    4. go down the BMW diff route

    Sorry I cant be any more helpful
    Stags and Range Rover Classics - I must be a loony

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