+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 30 of 31

Thread: Disabling the Haldex?

  1. #1
    Veteran Member Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb's Avatar
    Join Date
    May 2005
    Location
    Grimsby
    Posts
    7,299

    Disabling the Haldex?

    Does anyone know if I can for sure disable the haldex system without causing long term damage to it? I think my new summer wheel setup is doing funky things (maybe it's too wide in the rear) so I wanted to try to disable the haldex to see if that changes anything. I've heard that you can pull the fuse as well as unplug it but I wasn't sure if it would cause damage if I did that for 4 or 5 months. Anyone have some insight?
    Need design work?
    www.benpurkissdesign.com

  2. #2
    Senior Member thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt's Avatar
    Join Date
    Aug 2009
    Location
    Toronto
    Posts
    581
    I read that the rear diff will still spin freely (although not engage the wheels) even if you unplug the haldex. People do it for a quick burnout or dyno, but not sure about long term effects. I can't imagine it being good in the long-term if you do it for extended periods... something about oil getting way too hot or something.

    But i dunno, just guessing from what i've read - im sure someone will correct me.

    +1 useless post

  3. #3
    Moderator wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons has a reputation beyond repute wparsons's Avatar
    Join Date
    Dec 2004
    Location
    Whitby
    Posts
    7,687
    Isn't the torque split on the TT 100/0 unless the fronts slip (or the haldex computer thinks theres slip)? If so, pulling the fuse shouldn't harm anything because its "functioning" just like it does the vast majority of the time.
    Light travels faster than sound, so people may appear to be bright until you hear them speak...
    flickr

  4. #4
    Veteran Member Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb's Avatar
    Join Date
    May 2005
    Location
    Grimsby
    Posts
    7,299
    I've read more along the same lines as what Jason was saying with the heat and such. Will, with the haldex, once you hit the gas it engages, not on wheel slip. If you're just cruising it's not really on but if you drop it down or punch the gas it engages. I think it's an 80/20 or 70/30 split with the OEM controller
    Need design work?
    www.benpurkissdesign.com

  5. #5
    Veteran Member Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber's Avatar
    Join Date
    Sep 2008
    Location
    Oakville/Waterloo
    Posts
    2,544
    so why do you want to disengage it? how wide were your wheels before compared to now? I thought width shouldn't matter, only OD diameter does.

    seems like you could do alot of damage.
    bankrupt.
    SymproCNC.com im for all your machining needs (spacers, center cap spikes etc)

  6. #6
    Veteran Member Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb's Avatar
    Join Date
    May 2005
    Location
    Grimsby
    Posts
    7,299
    The old wheels were 8/9 split. These are 8/9.5. The OD is still within spec but I think the extra weight is what is throwing it out of wack. That's 3" total of wheel width. I dunno. I would rather sell the wheels then risk damage to the haldex... want some twists?
    Need design work?
    www.benpurkissdesign.com

  7. #7
    Veteran Member ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07's Avatar
    Join Date
    Jun 2009
    Location
    Cambridge, ON
    Posts
    1,685
    Ben, the width shouldnt matter at all its the tire overall circumference that is the picky one. What are your tire sizes? And what is the oem tire size? (assuming oem is same front and back)
    '01 A4 2.1T / '98 Audi A4 Car Trailer / '96 Audi A4 2.8 (parting out) / '06 VW Touareg 3.2L / '99 Honda Civic EK 1.8L
    www.Novustech.ca

  8. #8
    Moderator soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute
    Join Date
    Oct 2007
    Posts
    12,726
    oem would be 225/45/17 if it came with say fat fives 17x7 et 38 i think
    Foreign Automotive (519)894-9551 | Chopshop.
    Quote Originally Posted by Zuber Speed View Post
    ....back when I was hardcore

  9. #9
    Veteran Member Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb's Avatar
    Join Date
    May 2005
    Location
    Grimsby
    Posts
    7,299
    yeah OEM is 225/45/17

    New ones are 205/40/18 front and 225/40/18 rear
    Need design work?
    www.benpurkissdesign.com

  10. #10
    Veteran Member ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07's Avatar
    Join Date
    Jun 2009
    Location
    Cambridge, ON
    Posts
    1,685
    It may be due to your tire sizes:
    This is your current setup:


    As you can see, there is a difference of 2.571% in perimeter between front and rear. While this may be ok on some awd systems, the haldex may be a little more picky. A chat with some AUDI/VW technician who knows their stuff may be able to shine some light on what the exact limits of haldex are.

    What I would suggest is you make one of the two following changes:
    *1.056% difference front to rear*

    *0.719% difference front to rear*



    NOTE: while this may not be the exact or complete source of your issue, it will make it better.
    '01 A4 2.1T / '98 Audi A4 Car Trailer / '96 Audi A4 2.8 (parting out) / '06 VW Touareg 3.2L / '99 Honda Civic EK 1.8L
    www.Novustech.ca

  11. #11
    Moderator soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute
    Join Date
    Oct 2007
    Posts
    12,726
    and if you think there is a chance you are out of spec stop driving it

    this was @ 5% staggard









    sauce
    Foreign Automotive (519)894-9551 | Chopshop.
    Quote Originally Posted by Zuber Speed View Post
    ....back when I was hardcore

  12. #12
    Veteran Member Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb's Avatar
    Join Date
    May 2005
    Location
    Grimsby
    Posts
    7,299
    Those calculations 2 posts up, the diametre difference is actually only 1.65% (with my current setup) so not nearly as bad. Still getting me worried though.

    The faster/slower speedometre part I don't really get though.
    Need design work?
    www.benpurkissdesign.com

  13. #13
    Veteran Member Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb's Avatar
    Join Date
    May 2005
    Location
    Grimsby
    Posts
    7,299
    ok just did another offset calculator and I'm 2.6% difference in diameter. Not that crazy but maybe enough to throw things off?
    Need design work?
    www.benpurkissdesign.com

  14. #14
    Veteran Member ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07's Avatar
    Join Date
    Jun 2009
    Location
    Cambridge, ON
    Posts
    1,685
    The faster slower was determining the sign of the difference. so in the first one you had positive difference (hence to fast) and the rear negative so total is 2.6%.

    I'd say 3% is the limit, and 2.6 is getting close. Just think that one wheel has to spin 2.6% more in one turn than the other (if the diff was not compensating). So every 38 turns, that is a complete turn.
    So in a kilometer, the front would spin 512.6 times and the rear 499.7 times (12.9 turns difference). While this means nothing on a 2wd on a awd it’ll make the diff work all the time instead of only when needed.
    Just for comparison in the proposed setups the numbers look as follows:
    1st setup: In 1km front spins 512.6 times and rear 517.9 times (5.3 turns difference)
    2nd setup: in 1km front spins 496.2 times and rear 499.7 times (3.5 turns difference)
    At 5% like liam posted the difference would be 26 turns, that is quite the difference when you travel 100km…

    Keep in mind this may not be the only issue, but I definitely think it plays its part.
    '01 A4 2.1T / '98 Audi A4 Car Trailer / '96 Audi A4 2.8 (parting out) / '06 VW Touareg 3.2L / '99 Honda Civic EK 1.8L
    www.Novustech.ca

  15. #15
    Veteran Member Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber has a reputation beyond repute Punjabi_Dubber's Avatar
    Join Date
    Sep 2008
    Location
    Oakville/Waterloo
    Posts
    2,544
    Fairly certain they don't make 205/45/18 tires.


    Have you tried throwing the winter tires back on in the rear and seeing if the problem goes away?

    I would go 215/40 in the front but your losing stretch.

    If you want to get rid of the 205/40s i'll take them for sure.
    bankrupt.
    SymproCNC.com im for all your machining needs (spacers, center cap spikes etc)

  16. #16
    Veteran Member ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07's Avatar
    Join Date
    Jun 2009
    Location
    Cambridge, ON
    Posts
    1,685
    You're right, that size is not available (should've checked before suggesting it). I guess that leaves one option only, that sucks.
    '01 A4 2.1T / '98 Audi A4 Car Trailer / '96 Audi A4 2.8 (parting out) / '06 VW Touareg 3.2L / '99 Honda Civic EK 1.8L
    www.Novustech.ca

  17. #17
    Veteran Member Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb's Avatar
    Join Date
    May 2005
    Location
    Grimsby
    Posts
    7,299
    You have 215/40's? Booked the car with Jason for Monday so he can do an inspection to make sure the car is safe. I'm going to swap the winters back on tonight and see if the problem comes back.
    Need design work?
    www.benpurkissdesign.com

  18. #18
    Moderator soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute soundwave has a reputation beyond repute
    Join Date
    Oct 2007
    Posts
    12,726
    Quote Originally Posted by Neb View Post
    The old wheels were 8/9 split. These are 8/9.5. The OD is still within spec but I think the extra weight is what is throwing it out of wack. That's 3" total of wheel width. I dunno. I would rather sell the wheels then risk damage to the haldex... want some twists?



    fwd swap(summer mode)
    Foreign Automotive (519)894-9551 | Chopshop.
    Quote Originally Posted by Zuber Speed View Post
    ....back when I was hardcore

  19. #19
    Senior Member thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt has much to be proud of thekatt's Avatar
    Join Date
    Aug 2009
    Location
    Toronto
    Posts
    581
    Quote Originally Posted by Neb View Post
    I think my new summer wheel setup is doing funky things
    Just outta curiosity, can you describe the "funky"? Just want to know your symptoms in case it happens to me one day.

  20. #20
    Veteran Member Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb's Avatar
    Join Date
    May 2005
    Location
    Grimsby
    Posts
    7,299
    When it happens (it's happened to me 2 times since I put the wheels on) it feels like I have a flat tire. Weird, unnatural vibrations when I give it gas. I also notice it sounds like the exhaust is a bit louder (maybe another issue though?) Definitely loss of power and the second time it happened there was a whining sound coming from somewhere (but sounded like the front)
    Need design work?
    www.benpurkissdesign.com

  21. #21
    Moderator EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay has a reputation beyond repute EMSbyDay's Avatar
    Join Date
    May 2003
    Location
    Newmarket
    Posts
    10,520
    Dont forget that when dealing with fractions of percentages in tire differences, if you have stretched your tires that can affect OD as well.

  22. #22
    Veteran Member Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb's Avatar
    Join Date
    May 2005
    Location
    Grimsby
    Posts
    7,299
    Yeah for sure. I found that I'm actually running 2.6% OD between front and rear. Max that Audi says is 3% so I think that's playing a large factor. Swapped the winters back on last night so we'll see what happens this weekend. Car is booked to see Jason Monday either way though just to make sure.

    If it's the tires, I guess I'll order some 225/35 for the rear. That'll bring the OD to 1% which should work.
    Need design work?
    www.benpurkissdesign.com

  23. #23
    Veteran Member ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07's Avatar
    Join Date
    Jun 2009
    Location
    Cambridge, ON
    Posts
    1,685
    Keep us updated!.

    Stretch doesnt play a large role...unless its extreme stretch, which i dont think is the case here..
    '01 A4 2.1T / '98 Audi A4 Car Trailer / '96 Audi A4 2.8 (parting out) / '06 VW Touareg 3.2L / '99 Honda Civic EK 1.8L
    www.Novustech.ca

  24. #24
    Veteran Member Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb has a reputation beyond repute Neb's Avatar
    Join Date
    May 2005
    Location
    Grimsby
    Posts
    7,299
    No, but OD does between the two. I've been using this calculator to check the percentage..

    http://www.miata.net/garage/tirecalc.html
    Need design work?
    www.benpurkissdesign.com

  25. #25
    Veteran Member ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07 is a splendid one to behold ipop07's Avatar
    Join Date
    Jun 2009
    Location
    Cambridge, ON
    Posts
    1,685
    Yup. That one is good. The tire rack one is better a little, it gives you more info as well as brands and models for the sizes you pic: http://www.1010tires.com/tiresizecalculator.asp
    '01 A4 2.1T / '98 Audi A4 Car Trailer / '96 Audi A4 2.8 (parting out) / '06 VW Touareg 3.2L / '99 Honda Civic EK 1.8L
    www.Novustech.ca

+ Reply to Thread
Page 1 of 2 1 2 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

     

Similar Threads

  1. Disabling ABS and Airbag...
    By vdubvento in forum Volkswagen General Discussion
    Replies: 15
    Last Post: 07-29-2009, 11:43 PM
  2. Corrado R32 Haldex swap with GT40R
    By VWJettaMK2 in forum Car Lounge
    Replies: 17
    Last Post: 01-11-2007, 01:02 AM
  3. Haldex AWD Swap..
    By schumacher in forum 1.8T Engine
    Replies: 4
    Last Post: 02-27-2006, 03:28 PM
  4. Disabling the alarm beep
    By VDUB Bella! in forum Volkswagen General Discussion
    Replies: 23
    Last Post: 08-12-2003, 12:49 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts