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    Thread: How to check & fill the manual transmission fluid level 1998 VW Cabrio

    1. 07-26-2009 01:28 PM #1
      I desperately need your help!

      I need to know how to check & fill the fluid level in my 1998 VW Cabrio...it is a manual transmission?

      Ive located what appears to be the drain plug; which is located on the rear of the transmission housing. the plug is on an angled surface near the bottom.

      You all are my best hope of learning how to do this...


    2. Member SnubbedMK3's Avatar
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      07-26-2009 01:54 PM #2
      There is a plug, a giant allen key, on the driver side of the transmission.

      That's where you can check/fill the fluid. But on a 5spd, the transmission is normally completely sealed..

      And don't ask if it's a manual transmission.

      Is it 5spd or auto!!


      Modified by SnubbedMK3 at 1:01 PM 7-26-2009


    3. Member Harris_Teeter's Avatar
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      07-26-2009 02:00 PM #3
      you'll need a 17mm allen socket

    4. 07-26-2009 02:18 PM #4
      5 speed manual... I've never heard of a "sealed transmission" ... should any maintenance ever be performed?http://forums.vwvortex.com/zeropost?cmd=reply&id=59358504#

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      07-26-2009 02:26 PM #5
      The only time i have replaced my fluid in the trans was when i replaced it, but it was shipped dry so i kinda had to.

      Are you having a problem with the trans? it is making noise?


    6. 07-26-2009 02:47 PM #6
      not having problems... I've just purchased it and was wanting to check it ... the car has 167K on it. The CV joint boot is in bad shape and I'm gonna replace it this afternoon.

      any tips you have would be appreciated...


    7. Member Old Windy's Avatar
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      07-26-2009 03:06 PM #7
      You drain it on the bottom by the center of the trans. It looks like a giant 17mm allen bolt.

      If the trans is out of a car and you have not installed it yet; remove the speed sensor (it is on the top and it uses if I do remember a 24 hex key); turn it upside down and let it drain that way and refill it the same way then re-install the speed sensor and you are done.

      Also just to make sure replace the seal on the side (A big green one).
      Have fun it is easier than what it sounds.

      PS use two jugs of fully synthetic grease.

      Quote Originally Posted by Preppy View Post
      On a scale from flaming bag of dog poop to drunken sex with a hot stripper... your car is a case of herpes from a girl you picked up at wal mart.

    8. 07-26-2009 03:19 PM #8
      I drained mine via that plug in the back that you noticed first.

      Then I had to go to NAPA and but that 17mm Allen wrench which cost about $13.

      Filled it up with some synthetic heavy weight ****, put that 17mm nut back in and called it a day.

      Seems to gear a little smoother now.


    9. Junior Member ProjeKT PistolWhip's Avatar
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      04-08-2011 10:04 PM #9
      threads a little old, but just a helpful hint to anyone else who looks it up: instead of buying a 17mm allen, just pop one of your lug nuts off (most of which are 17mm) and use that and a wrench to get the plugs out. if ur cheap or broke like me this is the way to go.

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      04-12-2011 09:02 AM #10
      sub

    11. 03-16-2013 07:13 PM #11
      Still talking about a 98 cabrio, 5 spd manual. Next to the speed sensor, there's a plug/cap/something. It's on a hump on the transmission where the shifter linkage links to the transmission. It's a pretty big cap, I didn't have a metric socket that big, but a 15/16 socket fit it fine. I took it off and peered in, all I see is more metal. Can you fill the transmission from there, or is that a separate, sealed chamber of its own? Seems easier than taking off the speed sensor.

    12. Geriatric Member VDub2625's Avatar
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      03-16-2013 07:34 PM #12
      Put that back in and don't touch another thing on your trans without knowing what you're doing first.

      Some of those bolts hold internal parts that need the case split open to re-set.

      Do it by the Speedo hole. It's incredibly easy, it's an electronic sensor, not even a cable to worry about.

      You don't really need to check the fluid level, if it's original to the car, just replace it, it's cheaper than an engine oil change.

      Take the 17mm hex drain plug of the bottom to drain, take off the side 17mm hex to set the level (~2 qt/ltr is that fits there, when it starts to drain out the side fill hole it's done).

      Make sure to get GL 4 compatible fluid, there is yellow metal (brass synchros) inside and some other spec oils (including some GL5 exclusive oils) eat away at it. They do name GL 4/5 compatible oils. Spec is 75w90 but I used 70w80? I think it was (redline mtl, the redline mt-90 is factory spec and the only difference is the weight), trans is smooth as butter fresh after a rebuild.

      Sent from my LG-LS970 using Tapatalk 2
      Last edited by VDub2625; 03-16-2013 at 07:41 PM.
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      03-16-2013 07:44 PM #13
      make sure you can get the side 17mm bolt out (fill hole) before you remove the (drain) bottom 17mm.
      it sure would be schitty if you drained the fluid only to find out that the side (fill hole) is seized.

    14. Banned LöW N SLö's Avatar
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      03-16-2013 08:11 PM #14
      Best DIY out there:

      http://brokevw.com/020oil.html

      Thanks to BROKE for this.

    15. Geriatric Member VDub2625's Avatar
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      03-17-2013 12:56 AM #15
      Quote Originally Posted by Svën Höek View Post
      make sure you can get the side 17mm bolt out (fill hole) before you remove the (drain) bottom 17mm.
      it sure would be schitty if you drained the fluid only to find out that the side (fill hole) is seized.
      The side hole doesn't matter much. It's just for a perfect fill but if you drain, just re fill with 2qt or liters (they're both approx. the same).

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