Engine Drivetrain 1st Gen Cooper S Most liked posts in thread: Clutch starting to slip in higher gears

  1. Minidave

    Minidave Well-Known Member
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    #2 Minidave, Mar 23, 2017
    No comment on the diff, but I highly recommend the Valeo kit for a Gen 1 car.
     
  2. Savvy

    Savvy Well-Known Member
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    #3 Savvy, Mar 23, 2017
    If you scour the interwebs you may be able find an online store that has it in stock. QDF38Z is what you are looking for. I just replaced my clutch, flywheel, and OEM LSD with the Quaife a couple weeks back. But also bought all my supplies months ago.
     
  3. Savvy

    Savvy Well-Known Member
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    #4 Savvy, Mar 23, 2017
    https://whiteheadperformance.com/product/quaife-qdf38z-atb-helical-lsd-diff-limited-slip-differential-mini-cooper-s-6-speed-getrag/ says they have it in stock.

    You will also want to buy new bearings for it right away. LM501349 <-- 2 of those. And to get them in place is super simple. Turn your oven on to about 250°F. Let it get to temp, place the bearings in the oven and set the timer for 30mins. They should be good to slip right into place. DISCLAIMER: my diff was sitting outside in freezing temps over night... so you may need to crank the heat up just a touch... Or put your diff in a freezer over night to help.
     
  4. Savvy

    Savvy Well-Known Member
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    #5 Savvy, Mar 23, 2017
    Went from this...
    [​IMG]

    .... to this....
    [​IMG]

    The first one I baked at 225 for about 20mins and had to walk it into place with a pin punch and hammer. (Not recommended) The second one was baked as I mentioned above and slid right the h377 on. Just needed to tap the last .020" or so, to seat it on the shoulder 100%.
     
  5. 00Mini

    00Mini Well-Known Member

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    #6 00Mini, Mar 23, 2017
    Nice tip !!
     
  6. Savvy

    Savvy Well-Known Member
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    #7 Savvy, Mar 23, 2017
    I could go super nerd on everyone and explain how came up with the temp... but I'll just say it was a highly educated "guess." That wasn't all that far off. I will say, for safety's sake, you don't want to go above 350°F. Not just for burning your own hands, but for not dicking with the material properties on the bearings.
     
  7. Ujin

    Ujin Member

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    #8 Ujin, Mar 24, 2017
    Thanks Savvy I will check this out.
     
  8. beken

    beken Well-Known Member

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    #9 beken, Mar 29, 2017
    I have the Valeo single mass flywheel & clutch in mine.
    It works great though it does not grab as hard as the dual mass flywheel units.

    It is a simpler design so fewer things to go wrong and much less expensive.
     
  9. Ujin

    Ujin Member

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    #10 Ujin, Mar 31, 2017
    Thanks Beken, I have gone with the Valeo.
     
  10. Ujin

    Ujin Member

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    #11 Ujin, Apr 30, 2017
    Well, I managed to source a Quaife LSD and pulled the transmission, replaced the clutch and flywheel, cracked open the gearbox and installed the differential. Just got it all buttoned up today and took Angus for a spin (going easy on the new new clutchy bits). Wow, the differential really makes it a different animal now in the corners. Absolutely worth the trouble.
     
  11. 00Mini

    00Mini Well-Known Member

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    #12 00Mini, Apr 30, 2017
    Nice to hear everything went well and it was worth the effort and expense. :Thumbsup:
     
  12. Ujin

    Ujin Member

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    #13 Ujin, May 1, 2017
    It went about as well as I expected. Glad it is done. I only managed to damage one thing, the shifter cable bracket exploded while i fumbled with the transmission on the way under the frame. Ordered a new one and had it in a few days. It was pretty brittle and may not have survived remounting the shifter cables. Live and learn.