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4WD System...........agen

Discussion in 'A3/S3 Forum (8L Chassis)' started by Lemon S3, Feb 22, 2010.

  1. Lemon S3
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    Lemon S3 Alex

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    [Feb 22, 2010]
    Right... I've replaced the complete back end of the car which came off a mk4 golf and only done 14,000 miles. Still got to bleed the brakes, may have fecked the master cylinder as I didn't know about not to push the pedal down all the way until after I finished the rear.
    Anyway this thread is mainly about the 4wd, its on axle stands, started it up, put it in gear but the bloody rear wheels still aren't working. First time I forgot to connect the wiring plug on the back of the diff, plugged it in but still no joy. Am I missing something here??
    #1
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  3. sportquattro
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    sportquattro Active Member

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    [Feb 22, 2010]
    Some people have mention an earth strap causing Haldex not to work, prob worth checking its not been missed.
    #2
  4. s3_kev
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    s3_kev Stage2'd!!!!!!

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    [Feb 22, 2010]
    have you checked the fues ain't blown for the haldex system?
    #3
  5. s3_stig
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    s3_stig Member

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    [Feb 22, 2010]
    I fault the back wheels only spin when the front lose traction that's what the hadlex for
    #4
  6. sportstractor
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    sportstractor Chugger

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    [Feb 22, 2010]
    try slowing one of the wheels down, then see if it kicks in
    #5
  7. S90GAV
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    S90GAV Member

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    [Feb 22, 2010]
    yer there was a thread on here a while ago, and im certain people came to the conclusion that the rear wouldnt spin when the cars on axle stands
    #6
  8. Lemon S3
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    Lemon S3 Alex

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    [Feb 22, 2010]
    When I removed the old diff etc I didn't notice an earth strap nor on the new one.
    #7
  9. Lemon S3
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    Lemon S3 Alex

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    [Feb 22, 2010]
    Just had a thought while watching lee evans that when I forgot to connect the wiring plug on the back of the diff first time I started the car, when I plugged it back in I didn't turn the ignition off completely, so thought it may have needed to be turned off to reset itself or something. Started it up a minute ago and..............................it WWOOOOOOORRRRRRRRRRRKKKKKKKKKKSSSSSSSSSS!!! :jump:
    I have 4 wheel drive again :) I can also confirm that it will work on axle stands.

    Just need to sort the blooming brakes out now. Does anyone know the correct order to do it in, I've found a number of ways. Is it MC, Proportioning valve, RR, RL, FR, FL or RR, RL, FR, FL, MC?
    Last edited: Feb 22, 2010
    #8
  10. Mpathe
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    Mpathe 1st gear

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    [Feb 22, 2010]
    if all 4 wheels are off the floor then they should all spin 100%
    #9

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