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Thread: T5 4motion grinding

  1. #1
    Join Date
    Mar 2015
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    Victoria
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    T5 4motion grinding

    Morning all,
    I've just picked up a T5 4motion with a BNZ and 6 speed manual transmission. It's making a nasty grinding noise when coasting. It's most noticeable driving in 5th or 6th gear when you release the accelerator the noise starts but goes away if you accelerate or push the clutch in. It's also not there at higher speeds, if your doing 100kmh in 5th and take your foot off the accelerator there's no noise but as the van slows to about 60kmh the grinding kicks in.

    Any help would be much appreciated,

  2. #2
    Join Date
    Feb 2012
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    VIC
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    Does the noise change at all while cornering? Does the frequency change if you keep the same speed but change between 5th and 6th? if you could upload a short clip to youtube of the noise it might help.
    MY12 Passat FSI Highline | 3.6L VR6 | Cashmere Brown | Driver Assistance Package | Dynaudio | Discover Media | TPMS Direct | Side Assist | More coming soon
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  3. #3
    Join Date
    Dec 2008
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    Sydney/Canberra
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    5,498
    Users Country Flag
    5th and 6th gear bearings are about to send themselves through the rest of the gearbox.
    '07 Transporter 1.9 TDI
    '01 Beetle 2.0

  4. #4
    Join Date
    Mar 2015
    Location
    Victoria
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    Users Country Flag Thread Starter
    Thanks, no noise change while cornering not sure about the frequency. I tried to make a clip but all you can hear is the rain ...........At the mechanics now so I'll soon know the answer.

  5. #5
    Join Date
    Jun 2019
    Location
    Cabarita Beack NSW
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    2
    And the answer?

  6. #6
    Join Date
    Oct 2008
    Location
    Mt Cotton
    Posts
    3,643
    How about CV joint , mine made similar unusual sounds and when jacked up in gear you could hear which side it was . New joints fitted and the noise went away , when your in those higher gears there is less pressure on the CV so it can move around more easily under load it was more quiet .

  7. #7
    Join Date
    Nov 2007
    Location
    QLD
    Posts
    347
    I have read on other UK forums that it can be dry splines in the front axle.

  8. #8
    Join Date
    Oct 2008
    Location
    Mt Cotton
    Posts
    3,643

    Quote Originally Posted by BrianJ View Post
    I have read on other UK forums that it can be dry splines in the front axle.
    That makes sense because when I changed mine the old ones were dry and rusty looking , when refitting new ones good lube was used . Plus the old ones were badly worn so close to stripping themselves out .T5 4motion grinding-shaft-jpg T5 4motion grinding-spline-jpg
    Last edited by Sunny43.5; 11-05-2022 at 10:42 AM.

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