Jaguar S Type, 77K miles, started showing warning sign "gearbox fault" intermittently. No noise and running smooth but somtimes erratic gear changes. Has anyone ran into this problem? Does this mean my gearbox is about to stop working?

Worried-TL

 

Search will get you other posts and what people did

 

Tlass68, did the car recently run through water such as heavy rain and puddles? Jags have issues with moisture fouling electronics. As a remedy to a moisture issue or for some other unknow issue, you may try disconnecting negative terminal from battery then reconnect after an hour. Drive gingerly (no hard acceleration) in "Normal" transmission mode for 250 miles, then in "Sport" mode with more frequent hard acceleration. The purpose of this exercise is to clear erroneous old transmission mal-events and stored adaptive driving techniques surplanting with your own.

 

It won't do that. If you do disconnect the battery (and there looks no particular reason to plus be aware you lose various settings as well as diagnostic data), there's no need to drive like that, let alone for 250 miles.

More or less the above post is plain wrong.

 

Tlass, get your codes read from the car's computer (check a local auto parts store, they often do this for free)...that will assist before any more random, vague replies are given.

 

To the contrare my fair forum friend "jagv8". Your "buggin in" leaves you with "Partially Wrong". I responded to Tlass68 with "You may try...", not: You must do this...". If you were to have asked me where I recieved my information for my help for Tlass68 I would have responded with "I had a similar event with my Jag and when "caught in a pinch" recieved information from a respected Jaguar technician with the exact remedy I kindly laid out for Tlass68. Furthermore, I researched for myself that Jaguar will perform the exact or similar detail themselves post code retrieval. Even code retrieval has proven to be vague or misleading themselves. "Losing various settings"...shmettings. In the event of a service the likelihood of losing stored settings is extremely high anyway. If Tlass68 is "caught in a pinch" he will hopefully learn what I experienced then learned will suffice for him too...without irreparable harm to his vehicle. Even if it what I laid out doesn't pan out the code(s) will reappear shortly thereafter. In closing and in advisement; please tone down your demeaning condecending rhetoric to me and to some of the other members here. I've read several of your posts and several of them left me concerned with your brashness.

 

i have the same problem with my 2000 s-type as well....ive driven it with the light on for about 2k miles and i think the problem is more electrical then problem with tranny. I wish i could pull the codes but don't have the money to take it to the dealership...sucks cause i just got the car!

 

bfs and jagV8 ,
If you like to criticise each others posts then you can use ignore function thus you will not be able see posts of each other .
bfs, you did a fair call as to put off the flames on your statement and thanks for that .
Please keep calm and no more baffles
Thanks

 

xlr8njag, you may have hit the nail on the head. I've read and experienced an electrical glitch such as moisture or external sensor malfunction to throw the trans. shifting off. The trannys are nicely built but internals i.e. solenoids, etc. can still develop glitches. I was once advised to "reset" the electrical/program by a battery diconnect for approx. an hour. There were no major settings loss. She apparently behaved normally thereafter, normally shifted? A few months ago Jaguar reflashed the TCM and ECU, cleared stored adaptive learning ($110). The "Lurch" prevailed and I haven't sensed anything different from prior operational behavior. Got to see some neat new Jags though. Yours is a 2000, If you haven't changed the tranny fluid perhaps this may be a time to do so? I plan a switch to Mobile 1 ATF (fully synthetic). Again, you may decide to clear codes by battery disconnect or have "any" mechanic hook up, read, and clear from there, then see what happens. If the light stays off and she shifts normally...hurray!

 

You can pull most codes causing the light using a $25 elm327 from ebay.

You don't have the separate PCM & TCM of the later cars. The PCM is very different. Advice for the later cars about the lurch etc does not apply to your car as yours has the Ford 5R55N tranny.

 

Could that be a transmission problem?

 

May be electrical and/or trans.... I experienced similar situation and everted a trans service by performing an electrical system/code reset.

 

Thanks alot bfsgross and all the other for the help! i plan on getting an oil change done sometime next month and i will probably change the tranny fluid and take it to jaguar to get the reset done....Hopefully that works and i will let you guys know!

 

thanks for the info guys, She goes into the shop on Thursday, I'll keep you posted what they find and what the fix is.

 

Good luck Tlass, we'll be waiting for your update

 

this is a very old thread I know, but my s type also has the light on but mine has reduced power, takes 5k revs to move it!
Hopefully someone has advice ?
M

 

Start any diagnosis with checking battery voltage. There must be a minimum of 12.6 volts present for all systems to function correctly.

With the ignition OFF, use a voltmeter to check the battery voltage across the terminals. If it's less than 12.6 volts, charge the battery at 2 to 5 amps for five or six hours and then retest. If voltage is still less than 12.6 volts, replace the battery.

If the voltage is correct, what DTCs are stored in the system? Post them here.

 

Thanks, I'm away for a few days but will start with the battery test. It's just odd that there isn't any power.
Thanks Mike

 

Sounds to be limiting power to save the engine/gearbox from something.... Use OBD live data to check things.

 

I know I sound like a broken record?
But think how can we attempt to help you with zero information?
What car? What engine? How many miles?

Have you done any searches on that code? What did you find?
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