Bike rack causing Clutch Slip on motorway?!- Mtbr.com
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  1. #1
    7am Backcountry ;- )
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    Bonking ... not feelin' well Bike rack causing Clutch Slip on motorway?!

    Hey,

    This only happens when I have my bike rack on the car and bike attached. (I have a Kona Coiler which is a heavy 35lb's)



    I have the above Mont Blanc rack and the bike wheels sit on the shelf so the bike protrudes quite high above the back of the car.

    Now I know you wouldnt think this would cause any drag but it does affect the car handling and somehow is causing my clutch to slip.

    I get the car to 50mph on the motorway and as soon as I try and go above 50 by accelerating the rev meter flies into the 5000-6000 just below the red and the engine overrevs

    almost like ive just pushed my clutch in and the car is no longer in gear, I let off on the accelerator and the revs go down to 2000-3000 and i'm back at 50mph. Its possible to get to 70mph by very slowly putting my foot down but if I as much as push the gas in an inch too far the clutch slips.

    Without the bike and rack my car can comfortably do 90mph.

    Any one else experienced or have any thoughts on this?

  2. #2
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    Duh...

    Your clutch is worn out. Each time it slips it will cause a lot more wear to your already worn out clutch disk. You have a very limited distance to drive before you are effectively in neutral. Take your car into a shop for an expen$ive repair, NOW.

  3. #3
    Weird huh?
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    of course

    Your blinker fluid could be a bit low as well.

    Didn't you used to have to take some sort of test to be allowed to drive?

    El Cid is Spanish for The Cid..
    cmdrpiffle 7 points 1 day ago
    Cinco de Mayo is Spanish for Cinco de Mayo

  4. #4
    7am Backcountry ;- )
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    Quote Originally Posted by cmdrpiffle
    Your blinker fluid could be a bit low as well.

    Didn't you used to have to take some sort of test to be allowed to drive?

  5. #5
    dog meat ankles
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    the heavy weight of the bike creates a gravity well that pulls the clutch away from the flywheel.

    the only ideal solution is to mount a 50 pound block of lead to the front of your vehicle and run a 50,000 volt current through it.

  6. #6
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    Your clutch must be extremely close to being worn out if the addition of that weight/drag is causing the slip. When you have 3 or 4 people in your car, does the same problem occur?
    :wq

  7. #7
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    Quote Originally Posted by PapaLegba
    the heavy weight of the bike creates a gravity well that pulls the clutch away from the flywheel.

    the only ideal solution is to mount a 50 pound block of lead to the front of your vehicle and run a 50,000 volt current through it.
    awsome....
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    many others lay broken:)

  8. #8
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    Quote Originally Posted by capoz77
    Hey,

    This only happens when I have my bike rack on the car and bike attached. (I have a Kona Coiler which is a heavy 35lb's)



    I have the above Mont Blanc rack and the bike wheels sit on the shelf so the bike protrudes quite high above the back of the car.

    Now I know you wouldnt think this would cause any drag but it does affect the car handling and somehow is causing my clutch to slip.

    I get the car to 50mph on the motorway and as soon as I try and go above 50 by accelerating the rev meter flies into the 5000-6000 just below the red and the engine overrevs

    almost like ive just pushed my clutch in and the car is no longer in gear, I let off on the accelerator and the revs go down to 2000-3000 and i'm back at 50mph. Its possible to get to 70mph by very slowly putting my foot down but if I as much as push the gas in an inch too far the clutch slips.

    Without the bike and rack my car can comfortably do 90mph.

    Any one else experienced or have any thoughts on this?
    A similar situation had hapend to me with my car. My volvo pressure plates were damaged. A mecchanic told me that a damaged pressure plate greatly affects the clutch. Clutch clatter, spillage and dragging are among its symptoms. He advised me to have a regular inspection of my car. A worse situation would occur if you ignore this. The engine might be damaged too so the damaged pressure plates must be replaced immediately.

  9. #9
    ALX
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    Quote Originally Posted by phoebs
    A similar situation had hapend to me with my car. My volvo pressure plates were damaged. A mecchanic told me that a damaged pressure plate greatly affects the clutch. Clutch clatter, spillage and dragging are among its symptoms. He advised me to have a regular inspection of my car. A worse situation would occur if you ignore this. The engine might be damaged too so the damaged pressure plates must be replaced immediately.

    If your pressure plate goes bad it won't damage the engine unless of course you hit the gas and the clutch slips and you hold the engine at high RPM for a long period of time. Either way your car has a rev limiter that will keep you from damaging the engine so in turn you just won't be able to be in gear.

    As it has been mentioned your clutch is bad and you need to replace it. The bike rack being installed adding 35+lbs of weight have probably very little to do with why your clutch slips unless you drive a really small car.

    What kind of car is it? I can probably estimate the cost of repair.

  10. #10
    What It Be ?
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    Yea you might want them to top off your halogen headlight fluid and check your ATF while they are in there

  11. #11
    7am Backcountry ;- )
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    Since posting this the clutch started slipping without the bike rack, with just shopping in the boot, to the stage where it would slip with just me in the car - so I guess the rack was an early warning sign it was on its way out.

    Got a new clutch fitted Volkswagon quoted me 295 fitted, got a VW mechanic who works for himself now to fit it for 140! He fitted a Sachs clutch who actually make VW own branded ones

    Drives supurb now

  12. #12
    ALX
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    Quote Originally Posted by ChrisJ
    Yea you might want them to top off your halogen headlight fluid and check your ATF while they are in there
    You and all the people who came in here poking fun at someone needing help with your un-immaginaitve insults can just stick it where the sun don't shine. You're all the kind of people to kick a guy when he's down, shame people like you still exist.

    Glad to hear you got your car fixed relatively unexpensive, clutch installs are usually pretty costly.

  13. #13
    7am Backcountry ;- )
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    Thanks alx!

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