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Thread: Gearbox doesn't like towns.

  1. #1
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    Gearbox doesn't like towns.

    Hi folks, can I tap in to the collective wisdom of the forum please?

    I picked up my car almost 2 weeks ago, in the first two days I got one gearbox fault message which cleared on a switch off and restart. I put thisdown to a changeof driver confusing the adaptive gearbox.

    I then took the car a drive through the Scottish Highlands to Orkney, 800 miles with no faults.

    Now on my return to Edinburgh I have had three gearbox fault messages today, all linked to what I think is the "lurch" at the gearchange near 30mph.

    Could this possibly be down to the box not having the most recent TCM flash or is it something more ominous?
    Last edited by Magrew; 14-09-18 at 22:01. Reason: Autocorrect correction

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    Is there any sign of the gearbox oil ever being changed?
    Noble M400, LR Disco 3, Rover 75 V6,Jaguar X350/358 coming... edit.. got one,2007 4.2 LWB with big restoration.

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    Yes, gearbox oil was changed 4k ago, at the same time as filters, this was at 64k miles.

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    Morning Guys,
    Once around every 6 months when pulling away fast'ish my v8 changes from 2nd to 3rd gear there's a slight lurch and the gearbox fault warning comes on. I just stop, switch off then restart and the fault warning clears. I did used to download the fault code but now can't remember what it was. Think it was a sensor.
    .
    Not much help to you but thought I would mention it.
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    Hope you get your problem sorted soon.

    Supertrev.

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    Truly immaculate 2004 XJ 350 - V8 in Jaguar Racing Green which sparkles in the strong sunshine.

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  7. #5
    Senior Member BrianG's Avatar
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    Quote Originally Posted by Magrew View Post
    .......... all linked to what I think is the "lurch" at the gearchange near 30mph.
    Hi, you obviously have a problem but just to be clear "the lurch" does not happen at 30mph. It happens as you almost come to a stop, at a road junction or roundabout,(5-10mph) but decide you can keep going. As you give it some accelerator pedal the gearbox has other ideas and goes into first gear with a jolt before changing back up into 2nd.

    You have had the oil and filter changed, which is good, but I would try getting the gearbox re-flashed. Be aware that earlier models may not always respond to this fix. If this does not improve things it is worth taking it to a ZF gearbox specialist repair centre for an opinion. (It also helps if you put your model type and year in your signature line).
    2006 X350 XJ8 3.5 V8 Sport Premium (Midnight/Ivory)
    Previous XJs:
    2006 X350 XJ6 2.7 TDVi (Indigo Blue/Barley Straw)
    1999 X308 XJ8 4.0 V8 (Meteorite/Warm Charcoal)
    1996 X300 XJ6 3.2 Executive (Spruce green /cream)
    1994 XJ40 XJ6 3.2 Sport (Gunmetal/Saville grey)

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    Quote Originally Posted by supertrev View Post
    .

    Morning Guys,
    Once around every 6 months when pulling away fast'ish my v8 changes from 2nd to 3rd gear there's a slight lurch and the gearbox fault warning comes on. I just stop, switch off then restart and the fault warning clears. I did used to download the fault code but now can't remember what it was. Think it was a sensor.
    .
    Not much help to you but thought I would mention it.
    .
    Hope you get your problem sorted soon.

    Supertrev.

    .
    Hi Supertrev,

    Sounds like the same thing but more frequent with me. Only in town driving though.

    Thanks

    Magrew

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    Thanks for clarifying the lurch, the car is a 2003 XJ6 3.0.

    I was out three times yesterday, a mixture of town and dual carriageway, no problem on any journey. This is so intermittent it only makes sense to me that it is software related. Unless someone knows better.

  11. #8
    Senior Member Fraser's Avatar
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    Quote Originally Posted by Magrew View Post
    Thanks for clarifying the lurch, the car is a 2003 XJ6 3.0.

    I was out three times yesterday, a mixture of town and dual carriageway, no problem on any journey. This is so intermittent it only makes sense to me that it is software related. Unless someone knows better.
    The connection to the TCM at the rear of the gearbox was known for leaking fluid on the early boxes, (later ones have improved seal). This can cause problems with dirt getting onto the pins in the socket and upsetting the gearbox software. The TCM is in the actual gearbox. So question is - was the socket cleaned-out and new seal put in when the fluid and filter was changed ?
    Fleet manager (!!) of: -
    XJ6 Sovereign 2007
    VW New Beetle 2009
    MG Midget 1500 1977
    MG TF 135 2010

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  13. #9
    Senior Member BrianG's Avatar
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    +1 for Fraser's suggestion - he beat me to it! I also seem to remember hearing that early ones had a TCM cable that was a bit on the short side, which pulled on the gearbox connector and strained the pins causing intermittent connections. Worth a look underneath if you can get to it.
    2006 X350 XJ8 3.5 V8 Sport Premium (Midnight/Ivory)
    Previous XJs:
    2006 X350 XJ6 2.7 TDVi (Indigo Blue/Barley Straw)
    1999 X308 XJ8 4.0 V8 (Meteorite/Warm Charcoal)
    1996 X300 XJ6 3.2 Executive (Spruce green /cream)
    1994 XJ40 XJ6 3.2 Sport (Gunmetal/Saville grey)

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  15. #10
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    Thanks guys, I will try and find an opportunity soon to get a look underneath, happy to go and check the condition of the subframes and bushes anyway.

    I have just completed a 355 mile drive in one hit this afternoon, Edinburgh to Cambridge, and no sign of a fault at all. I did have a moment of excitement before I left today though. I started the car first thing no problem and reversed out of my parking space and went to head out of my communal car park. All the warning lights came on and the steering got heavy. I stopped the engine and went to restart, dash lights came on but no life in the starter. OH NO!!!

    After 15 minutes staffing about including trying to jump off a fully charged battery I remembered I had plugged the OBD reader last night but I hadn't remembered to unplug it. Turns out an X350 does not like having the OBD reader attached permanently because once I removed it the car fired up straight away.

    A lesson learnt there.

    One thing though that concerned me, while the car wasn't running the gearbox was locked in park, making it impossible to push the car out of the way if it is obstructing anything. Is there a trick to move the lever to neutral so that you can at least push the car to a less obstructive area?

    Thanks again

    Magrew.

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