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Thread: Ac problems and transmission

  1. #1
    Join Date
    Mar 2016
    Location
    portugal
    Posts
    34
    My Cars
    BMW E65 730D 02

    Ac problems and transmission

    Hi guys,

    I bought a 2002 730d E65, so I’m new on this model, my old ride was always an E39 530d manual shifting.

    So, the AC doesn’t work, the front electric fan doesn’t move and I checked with Carlysoft, shows two electric fan faults.
    Despite this, works very strange, for instance on the highway the air from the rear vents is cold with the AC on, but in the front the air vents blows hot air to the passenger side and the driver side so so
    Even with the AC off sometimes the air from the vents is very hot, like when someone sets the climate to warm the car.
    All settings are fine, so it’s not a setting related problem.
    I want do mention when I did the diagnostic with Carlysoft, I also add a water valve fault, I erased this fault and never shows again.
    No FSU issues detected, but I ordered a new one just in case.
    I guess I have a problem with the water valve and that’s the reason the system blows hot air inside the cabin, and for sure I need a new electric fan, I’m not sure about the AC gas charge, I have this car for two days so I’m not sure if needs to refill the air con.
    Any advices?

    Other issue is related with the transmission, when I stop the car like in traffic lights, the transmission kicks, just when I’m about to stop, feels like someone hits you in the back.
    I heard about the guibo flex disk to cause the problem or gear box software update needed.
    I’m note sure about this problem and I’m afraid if this issue can cause damage if not solved.
    Can I postpone this or I need a urgent repair in order to save any other components?
    The gearbox shifts very soft, no problems at all down shifts perfectly well and no transmission diagnostic fault related.
    The only issue is this kick when stopping, I guess from 2 gear to 1 but I’m not sure.
    A little worry about this because I’m afraid this can escalate to a more serious transmission problem, what you guys advice me to do ?

    Forgot to mention this kick happens only with the warm engine.

    Thank you so much
    Last edited by marco pires; 05-20-2018 at 12:16 PM.

  2. #2
    Join Date
    Dec 2013
    Location
    Chicagoland area
    Posts
    4,372
    My Cars
    EXOTICS
    First,try replacing with new fluid & filter.
    TRANS

    Check the wiring and fuse for the heater control valve,
    it defaults to open when it loses power.
    HEAT

    Remove the radio,then you should be able to view the vent flaps,
    and observe their operation.
    VENTS

  3. #3
    Join Date
    Mar 2016
    Location
    portugal
    Posts
    34
    My Cars
    BMW E65 730D 02
    Thanks a lot.
    Tomorrow I will check the fuse box and the vents

  4. #4
    Join Date
    Jan 2008
    Location
    Oulu, Finland
    Posts
    2,042
    My Cars
    See my sig
    I have the same 2-1 kick on my 730d. It's most likely a acting up solenoid in the transmission mechatronic. So oil change wont help. I changed my guibo and it made a huge difference, but mine was so broken that I felt it everytime I was driving.

    The 2-1 kick isn't as noticeable as it was with broken guibo, but I can still feel it. Sometimes it doesn't even do it. I've been tryin to find another mechatronic so I could put new solenoids and sonnax zip kit for it and then just replace mine. No luck so far.

    I might try the software update too.
    Last edited by zener; 05-23-2018 at 04:45 PM.
    Current rides: E65 730dA '04, F10 520dA '11, E34 520iA '91

    Old rides: E46 316Ti, E53 X5, E38 728iA, E39 528iA, E46 318i Touring, E38 730dA, E36 316i, E36 328iA Cabrio, E38 728i, E38 750i, E36/3 320i, E36 318i, E39 530dA Touring, E38 740i, E39 528iA, E34 525iA, E32 750iL, E32 730iL, E34/2 525TDS,
    E34 525i, E28 518i, E34 535i, E34/2 525iA, E30/5 325i, E34 535i, E28 520i https://www.instagram.com/zener__/

  5. #5
    Join Date
    Dec 2013
    Location
    Chicagoland area
    Posts
    4,372
    My Cars
    EXOTICS
    I would not say it won't help,
    but it may help,
    which is why I worded my suggestion as "try".
    I have witnessed a simple fluid & filter change perform "Miracles",many times.

  6. #6
    Join Date
    Jan 2008
    Location
    Oulu, Finland
    Posts
    2,042
    My Cars
    See my sig
    Yeah, I know what you mean about "miracles". I also had TC shudder and instant shudder fix worked wonders. I will probably do full rebuild on the transmission later so this helped me a lot making more miles out of it. And after new guibo it feels completely different, as if the tranny was rebuilt already.
    Current rides: E65 730dA '04, F10 520dA '11, E34 520iA '91

    Old rides: E46 316Ti, E53 X5, E38 728iA, E39 528iA, E46 318i Touring, E38 730dA, E36 316i, E36 328iA Cabrio, E38 728i, E38 750i, E36/3 320i, E36 318i, E39 530dA Touring, E38 740i, E39 528iA, E34 525iA, E32 750iL, E32 730iL, E34/2 525TDS,
    E34 525i, E28 518i, E34 535i, E34/2 525iA, E30/5 325i, E34 535i, E28 520i https://www.instagram.com/zener__/

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