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What is your VIN or chassis number? Was a diagnostic done and if so what was the stored code?
VIN: AC02L21FM43513 and no no diagnostics has been done for the malfunction light as yet but in the past all of the four transmissions were replaced under warranty by the dealership without giving me any diagnostics codes.. One thing I'd like to mention is that when the lurch issue comes back the car drives like it is fitted with unevenly rounded wheels i.e. shakes and excessive movement felt inside the car the way I can describe it as the brakes getting engaged all by their own.. now when I put the car in cruise control mode on a motorway and its doing the same speed as I was doing before it al feels very different ride turn very smooth. Could it be something to do with the DSC?? works perfect in cruise control mode but not without it?? Feel free to ask any more questions and I'll be happy to answer them as best I can.
What I think you are feeling is a torque converter shudder. If you have the 6 speed ZF then the TCM needs to be reprogrammed with different software. The software is a coded access software where the dealer will need to call the ZF engineer to get the code from them. I would like to know the diagnostic codes which may be on the paper work you received. I am trying to run your VIN as it may have the Ford transmission in it which was in the 2000-2003 (US) and the 2000-2002 (UK) but I am having trouble running it on the Jag site.
Sometimes you can get the code P0741 logged but not all the time. When using the cruise the PCM implements a cruise strategy to reduce "gear hunting". SInce the engine light did come on that code may have been logged. Usually the gearbox fault light will also come on when a torque converter code is stored. The transmission can be reprogrammed but it does not have a seperate TCM. Everything is incorporated in the PCM. The transmission will adapt the pressure control on engagement into gear only. To reset these engagement adapts the PCM will need to be reprogrammed then a sequence of engagements into reverse and drive are done so the PCM can learn the pressures. For the ZF the TCM is inside the transmission and can be reprogrammed and we can also force the adaptations on the road with the Jag IDS. You need to look under your vehicle at the transmission. If you have a thin black plastic trans pan you have a ZF. If it's a deep metal pan then you have the Ford unit.
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