How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Mike Your Own Question

Mike
Mike, Jaguar Technician
Category: Jaguar
Satisfied Customers: 39198
Experience:  Tech Expert
9261905
Type Your Jaguar Question Here...
Mike is online now

i it ihave a jaquar xf my gearbox changes down to first or

Customer Question

i it
ihave a jaquar xf my gearbox changes down to first or second gear in slow moveing tr afficit has been checked by local dealers but have not been able to tr ce the problem one dealer suggested it was my fault for brakeing whith my left foot as this confused the gearbox any help would be appreciated
Submitted: 2 years ago.
Category: Jaguar
Expert:  Mike replied 2 years ago.

Hello Brian and Welcome -

My name is ***** ***** Im happy to help / advise you .. I am sorry to see you have had a wait.

With the issue of left foot braking - whatever reason you do that, that is feasible that as the dealer says, that could "confuse" the Ecu / Pcm - master computer... as it relies on correct signals from the pressing of the accelerator and brake pedals ( from there switches ) to tell the Pcm exactly whats happening -and that then commands the gearbox accordingly - So yes - that certainly could be the answer there..

Obviously you need to try and drive w/out doing that for a good while and see if the situation "cures" .... If it does, you know thats the cause of the problem you outline.

Other than that - the gearbox on your XF is fully electronically controlled - commanded by the gearbox Tcm ( computer ) which again as above, relies on the inputs of the various switches / sensors as to how it commands the transmission to operate. As such, this system is fully diagnosable by computer- It will need if you still have the trouble after driving as above to be connected to a suitable ( Jaguar ) diagnostic machine. This will first interrogate the Tcm for any logged fault codes which can then be sorted out and then see how it is. If there are no fault codes, the car can then be driven while the machine runs Live Data checks to find the fault that way.

So one way or the other , working through as above is the way to get to the bottom of your issues there.

If there is anything more you need or would like to discuss - by all means get back to me and we can carry on...

.>> Meantime ...........Please do click on the "OK/ Excellent ratings" for me as that's how Im credited for helping you - Thank you in advance for that...

You can and are most welcome to get back to me anytime you might need - clicking the OK ratings does not close you out at all..


Kind Rgds Brian - MIKE.

What Customers are Saying:

 
 
 
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil
< Previous | Next >
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex
 
 
 

Meet The Experts:

 
 
 
  • Matt

    Matt

    Mechanical Engineer

    Satisfied Customers:

    132
    BEng hons Mech engineering, in auto industry 22 years
< Last | Next >
  • http://ww2.justanswer.com/uploads/35/350matt/2012-6-7_182356_matsavatr.64x64.jpg Matt's Avatar

    Matt

    Mechanical Engineer

    Satisfied Customers:

    132
    BEng hons Mech engineering, in auto industry 22 years
  • http://ww2.justanswer.com/uploads/IN/indytech/2013-8-8_102717_SantoDomingo146598x6402.64x64.jpg Greg's Avatar

    Greg

    Technician

    Satisfied Customers:

    1080
    Automotive diagnostic tech
  • http://ww2.justanswer.com/uploads/TE/techmachine/0601821347169_717372168_8940977_39623330_o.64x64.jpg Ross's Avatar

    Ross

    Diagnostic and repair technician

    Satisfied Customers:

    453
    Licensed diagnostic and repair technician
  • http://ww2.justanswer.com/uploads/RO/RobMechanic/068.64x64.JPG Rob's Avatar

    Rob

    ASE Certified Technician

    Satisfied Customers:

    82
    30 years trade experience
  • http://ww2.justanswer.com/uploads/UK/ukiaibal/2012-11-9_205920_SAM0109.64x64.JPG uk_iaibal's Avatar

    uk_iaibal

    UK Car Mechanic

    Satisfied Customers:

    1
    Verified Car Mechanic.
  • http://ww2.justanswer.com/uploads/NA/nabilc/nabilc_avatar.64x64.jpg Billy's Avatar

    Billy

    Trainer/ Master Technician

    Satisfied Customers:

    38
    Trainer 8+ years, master tech. 10+ years, SAE member