Join Today
Results 1 to 5 of 5
  1. #1
    Junior Member
    This user has no status

    Join Date
    Apr 2010
    Posts
    2
    Thanks
    14
    Thanked 0 Times in 0 Posts

    C70 auto gearbox issue ?

    Hi guys,

    So recently got back into the Volvos and bought a C70 t5 2004 auto, noticed it intermittently clunks/judders not too harshly when slowing down at 10ish mph (down-shifting?), otherwise seems to be fine changing up and down. Does it when being driven from cold within 15-20mins maybe once or twice and then okay after that, I know the upper rear engine mount/bush has pretty much gone and has a lot of play, have been told it could be that but if it was that would this not happen more often..

    I am going to replace the mount bush, also have checked the atf oil and it's brown not black but not the red or pink I've read it should be, it's got 135k on the clock. I've had a quote for the gear fluid flush and autobox reset at £210, asked if it would resolve the clunk and was told it may or may not, what do you guys think ?

    Anyone had similar probs like this and sorted it with a flush.. In two minds whether to have the box flushed/ reset or just move on to something else as I know autoboxes can be costly.

    Any advice would be much appreciated,

    Many thanks

  2. #2
    Senior Member
    ...here we go again...
    LeeT5's Avatar
    Join Date
    Oct 2004
    Location
    Kent
    Posts
    5,337
    Thanks
    1,075
    Thanked 1,393 Times in 1,068 Posts
    First things first.....get the fault codes read. Are there any in the Gearbox? If there are, then doing any of the above may be a waste of time (depending on the code and it's interpretation).

    Brown fluid can indicate that the box has overheated in it's life.

    If there are no codes, then start with replacing the subframe to gearbox lower tranmission bush, the smaller of the two always tear out.
    Then, odd as it may seam, remove the MAF sensor and give it a good clean with carb cleaner then contact cleaner to remove the residue. This will improve the engine's idle and general smoothness across the revs and you'll be surprised at what a difference it can make to an auto box when changing gear! They will be smoother.

    Gearbox flush and reset is a must but like you've already been told, it's no gaurantee and may only prolong the enevitable.

    Secondly, If you do none of the above, then you'll never know, will you!?
    2014 V60 Polestar 6spd Auto :: Polestar map peak boost 17.4psi :: IPD 3" DP + 150cel :: Polestar 2.5" exhaust :: Paddle Shift Geartronic :: Black glass :: Maxton Splitter :: K+N Filter :: IPD Aluminium Top engine mount :: Brembo 6 pots :: 20" Polestar rims :: Brembo 371mm floating discs :: Sensus RTi + DAB + BT + WIFi :: D3S XENARC 6000k Active bending headlights

  3. The Following 2 Users Say Thank You to LeeT5 For This Useful Post:

    jigly (Saturday 19th August 2017),stricky1967 (Saturday 2nd December 2017)

  4. #3
    Junior Member
    This user has no status

    Join Date
    Apr 2010
    Posts
    2
    Thanks
    14
    Thanked 0 Times in 0 Posts
    Quote Originally Posted by LeeT5 View Post
    First things first.....get the fault codes read. Are there any in the Gearbox? If there are, then doing any of the above may be a waste of time (depending on the code and it's interpretation).

    Brown fluid can indicate that the box has overheated in it's life.

    If there are no codes, then start with replacing the subframe to gearbox lower tranmission bush, the smaller of the two always tear out.
    Then, odd as it may seam, remove the MAF sensor and give it a good clean with carb cleaner then contact cleaner to remove the residue. This will improve the engine's idle and general smoothness across the revs and you'll be surprised at what a difference it can make to an auto box when changing gear! They will be smoother.

    Gearbox flush and reset is a must but like you've already been told, it's no gaurantee and may only prolong the enevitable.

    Secondly, If you do none of the above, then you'll never know, will you!?


    Thanks Lee, there is no gearbox light on (orange arrow) but will try get codes read to see if any.. Will also give the MAF a spray clean, is this the transmission bush you mentioned? http://www.ebay.co.uk/itm/Volvo-Gear...UAAOSwr7ZW7uyJ

    I also rang the main dealer and they said they could do an update of the TCM for £90 :/ and to try this first before a fluid change, do you think this may help ?

    Thanks again.

  5. #4
    Senior Member
    ...here we go again...
    LeeT5's Avatar
    Join Date
    Oct 2004
    Location
    Kent
    Posts
    5,337
    Thanks
    1,075
    Thanked 1,393 Times in 1,068 Posts
    Quote Originally Posted by jigly View Post
    Thanks Lee, there is no gearbox light on (orange arrow) but will try get codes read to see if any.. Will also give the MAF a spray clean, is this the transmission bush you mentioned? http://www.ebay.co.uk/itm/Volvo-Gear...UAAOSwr7ZW7uyJ

    I also rang the main dealer and they said they could do an update of the TCM for £90 :/ and to try this first before a fluid change, do you think this may help ?

    Thanks again.
    Yes, the mount in the link is correct but my advise is to buy that then replace the small bush with a poly one from Powerflex.

    Regards the TCM update, yes it's definately worth it but the fluid should not be brown! You need a transmission flush also.
    2014 V60 Polestar 6spd Auto :: Polestar map peak boost 17.4psi :: IPD 3" DP + 150cel :: Polestar 2.5" exhaust :: Paddle Shift Geartronic :: Black glass :: Maxton Splitter :: K+N Filter :: IPD Aluminium Top engine mount :: Brembo 6 pots :: 20" Polestar rims :: Brembo 371mm floating discs :: Sensus RTi + DAB + BT + WIFi :: D3S XENARC 6000k Active bending headlights

  6. The Following User Says Thank You to LeeT5 For This Useful Post:

    jigly (Saturday 19th August 2017)

  7. #5
    Junior Member
    This user has no status

    Join Date
    Dec 2008
    Location
    Cheshire
    Posts
    1
    Thanks
    0
    Thanked 0 Times in 0 Posts
    I had a 2002 C70 some years ago which was flaring on gear changes from 2nd to 3rd. Thump! I changed the fluid (blooming expensive) and did an adaption. It didn't work so sold it. Shame as it was such a fun car.


 

Thread Information

Users Browsing this Thread

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

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
This website uses cookies
We use cookies to store session information to facilitate remembering your login information, to allow you to save website preferences, to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.
     
ipv6 ready