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'99 XJR Gear Box Fault

I recently rebuilt my 722.6 box after a bearing failure, the car would reverse and also go forward but it would not up-shift, perhaps it is in limp mode. Does the TCM need to be reset to clear the fault? I checked the solenoids and circuitry on the valve body electric thoroughly, I also checked continuity between gearbox connector and TCM connector, everything checked out fine. I still have the "Gearbox Fault" on the system check display, I would appreciate any help in resolving this problem.

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  • Jaguar Master
  • 682 Answers

Whats the fault code in the tcm? you should only need to clear the codes

Posted on May 29, 2017

6 Suggested Answers

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Posted on Jan 02, 2017

maklean
  • 1665 Answers

SOURCE: Automatic gearbox

How to prevent the transmission from damage
(The filter usually is screen type and can be cleaned when remove bottom cover. but this is not to be done at regular maintenance inspection.)
- Regularly check your parking space for leaks. Doesn't matter, is it the engine oil leak, power steering fluid or transmission fluid; if you discover any, get it fixed before it caused something serious.
- Once in a while check the transmission fluid level and condition. Not all cars however have the automatic transmission dipstick, in some cars, for example, in late Volkswagen models, the transmission fluid can only be checked by the dealer. Consult with your owner's manual for details. If the transmission fluid level is too low, there is a leak somewhere that needs to be fixed.
- Change the fluid as often as it said in your owner's manual or when it becomes too dark (rather brown than red) or dirty.
Also, keep in mind that an automatic transmission can not be drained completely - there is always some transmission fluid left inside the transmission (the torque converter, in the valve body, etc.) which means you only can change about %60 of the fluid at once. This is one more reason to change it more often.

- Use only the same type of the transmission fluid as specified in the owner's manual or on the dipstick. Some vehicles (e.g Dodge Caravan) are very sensitive to fluid type
- Never shift to the Reverse or Parking until the car comes to a complete stop.
- Never shift from the Parking mode when engine rpm is higher than normal idle.
- Always hold a brakes down when shifting from Parking.
- The automatic transmission can be damaged if towing with the drive wheels on the road. Always use a dolly or place powered wheels on the towing platform (if the vehicle is front wheel drive - tow it from the front leaving rear wheels on the road.
the filter

Posted on Jun 12, 2008

  • 1 Answer

SOURCE: xtype

was the cruise control on? [2003 x] this happens to me when I use the cruise control to slow down or accelerate. just setting the cruise for one speed seems to be ok, but if I use the cruise button to change speed, it goes into limp mode rather than downshift correctly. the japanesse transmission was meant to be used, no kid gloves needed. when the pedal is down, the transmission hummms lovely

Posted on Sep 16, 2008

  • 53 Answers

SOURCE: 1996 Hyundai Excel Sprint gearbox removel?

i beleve there are only 6 bolts its been along time scince i have worked on an excel but I do no u have to remove the clutch fork leaver as it is a pull style clutch

Posted on Oct 18, 2008

tommyboinow
  • 324 Answers

SOURCE: x-type jaguar automatic (gear box fault)

remove the positive battery cabelf ro 10 mins to reset the computer....

Posted on Nov 26, 2008

Mr BrokRench
  • 1623 Answers

SOURCE: Trans wont shift up or down..gearbox fault light on

Hello jjames696...The gearbox fault light has come on because the transmission control module (TCM) has received a fault signal from one or both of the two trans. sensors....The Output Shaft Speed (OSS) Sensor and/or Turbine Shaft Speed (TSS) Sensor.The TCM has now defaulted to limp mode...A diagnostic scan needs to be run...An OBD II scanner will retrive a P1722 fault code, the only code in it's library for the ZF5HP24 transmission. The WDS / IDS will pull other codes not found in the standard OBDII library (dealer or good transmission shop)
When was the last time the transmission was serviced? Manual shifting will take it's toll on the fluid quickly.
The transmission is sealed, no dipstick (which i think is a bad idea) You can check the fluid level by removing a plug on the passenger side of the case, you should be able to touch the fluid with your finger. Jaguar fluid is VERY expensive, Mobil 1 synthetic will work and meets ESSO specs.
Personally...i would change fluid every 25-30k.
Hopefully all you have is a bad sensor or a stuck solenoid and no internal componet damage.
Good luck, hope this answers your question...please take time to rate my fixya reply.

Posted on May 25, 2009

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Also, you could be buying other faults. If the speed sensor has had a problem - the box will change badly (snatching) and that will be another £250 where the expensive box will have ahad one fitted!

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