Computer says Transmission Fault

Hello.

Could you please explain if there are any driveability issues with the car. Does the transmission slip. Not go into any gears etc. Etc.. Or is the problem just that this warning keeps occuring? Let me know

PRELIMINARY INSPECTION
Transmission malfunctions may be caused by poor engine performance, improper adjustments or failure of hydraulic, mechanical or electronic components. Prior to diagnosing transmission concerns, always begin by checking fluid level, fluid condition and shift cable adjustment. Ensure engine starts with gearshift lever in Park and Neutral to ensure proper adjustment of TR sensor. Ensure all system-related fuses are okay. Check wire harnesses for proper routing. Verify all harness and component connections are clean and tight. See WIRING DIAGRAMS. If area of fault cannot be located or repaired during preliminary inspection, check self-diagnostic system. See SELF-DIAGNOSTIC SYSTEM. Repair as necessary.

Obviously I can only give my opinion as I am not there and have not seen the vehicle or had the opportunity to be hands on. So to speak. It is possible the PCM (computer) is sending the wrong signals to transmission thus causing the no shift into 5th. But I would be more looking towards an actual sensor sending the wrong signal to the PCM thus causing the late or no shift (speed sensor etc.) Before I replaced a PCM. Is the cars PCM (computer) giving any fault codes? Is there any other harsh/long/late shifting? There are a couple of TSB's regarding harsh or shifts taking too long but none about a no 5th gear shift. And these both state that the PCM should be reprogrammed not replaced? If the PCM is not giving a fault code. This could be the reason they are saying the PCM is bad and needs replacing? I would have this looked at by a jaguar dealer with the correct software before I replaced a PCM. I do not have a price for a the PCM. But $3000 + fitting + programming seems very high to me? You could ring a dealer and ask the service department if they have come across this fault before and also ask them about the price of a new PCM programmed and fitted?. Hope this helps ! Let me know

HARSH/SLOW SHIFTS - 3.0 L V6 VEHICLES - REPROGRAM PCM
TECHNICAL SERVICE BULLETIN
Reference Number(s): S307-07, Date of Issue: July, 2002
JAGUAR:2000-02 MY S-TYPE 3.0 L
VIN:L00001-M44997

Related Ref Number(s): S307-07
ARTICLE BEGINNING
Issue:
Customers of some 2000-01 MY S-TYPE vehicles may complain about harsh shifts or shifts that take too long to complete.
To improve harsh gear change, and the general performance of the automatic transmission, the Powertrain Control Module (PCM) should be re-programmed using the latest release (JTP759/14 or later) of the Worldwide Diagnostic System (WDS) disc.

I think this is the TSB they are referring to ! If this is a common fault, how much can this service kit cost? Labor time is just under 4 hours. So @ $150 per hour thats $600 I don't believe a service kit specifically mentioned in a TSB (this must be a common fault) cost's nearly the same as a brand new transmission. Why bother releasing a service kit if it is going to cost the nearly the same as a replacement transmission ! I would be asking the dealers for a breakdown of the cost's involved in this repair and as there is a TSB. Is there any way to lower the price because it is obviously a fault across the board on this transmission. And if the fault had occured while still under warranty you would not be having this problem !

5-SPEED TRANSMISSION - ERRATIC OR HARSH SHIFTS - VALVE BODY KIT AVAILABLE - REPAIR PROCEDURE
TECHNICAL SERVICE BULLETIN
Reference Number(s): S307-19, Date of Issue: June 2005
JAGUAR:2000-02 MY S-TYPE
VIN:L00001-M44997
SECTION:Transmission System

Related Ref Number(s): S307-19
ARTICLE BEGINNING
Issue
Some 2000-02 MY S-TYPE vehicles within the above VIN range may exhibit erratic or harsh transmission shifts. This can be caused by valve body or control solenoid failure.
Action
NOTE:Check for connector/wiring and Powertrain Control Module (PCM) faults, ensure the transmission fluid is clean and there is no debris in the sump. Refer to Global Technical Reference GTR Workshop Manual, section: 307-01 - Diagnosis and Testing. Any faults other than the valve body kit replacement, are to be carried out as a separate Warranty Claim.

When a fault has been confirmed with the valve body or control solenoid, a new valve body kit must be installed.

Global Technical Reference (GTR) Workshop Manual Information
Parts Information
PARTS INFORMATION
DESCRIPTIONPART NUMBERQTY
Valve body kitJLM 217521

Warranty Information
Warranty claims should be submitted quoting the information found in the table below. This will result in payment of the stated time and, where applicable parts/miscellaneous expense codes as listed.
WARRANTY INFORMATION
Description
Install a new valve body kit SRO44.91.31
TIME 3.8 hrs.
PART #JLM 21752