Hello, I am new to this site but need some help please. I have a 2005 xj8l with 130K miles and the transmission seems to be slipping. Right now the issue shows up between 20 - 30 mph only when you accelerate fairly fast. Local mechanic said it is a transmission problem but he can't fix it. I guess my first question is could it be something minor? Second question would be asking for advice on where I could get a used transmission with some warranty on it. Any help is really appreciated. Thank you

 

Have fluid level checked first and then vehicle scanned for DTC's.

If the fault can be tracked down these transmissions are repairable.

 

Thank you

 

I'm going to assume that you don't have service records. So, here's what I'd do first. Drain the transmission fluid and add ONLY Ford Motorcraft Mercon SP or Shell Spirax S4 or OEM Lifeguard 6.Do not overfill. These transmissions were first introduced as never requiring service.. This has now been changed to service every 80k miles. Better than even odds this will fix your problem.

 

Hi jo48708,

I have had good success resolving issues like yours by flushing the fluid (or draining and refilling 3 times) with Motorcraft Mercon SP or ZF Lifeguard 6, then clearing the Mechatronic adaptations, updating the firmware to the latest version, then driving the vehicle to complete the adaptation drive cycle. Clearing the adaptations and updating the firmware require a Jaguar dealer-level system such as IDS or SDD. You might call around to local European repair shops to see if one in your area has the capability to do this programming.

If the above is successful, it would then be prudent to replace your pan/filter and the sleeve around the electrical connector, but this could be wasted money if your transmission has an internal malfunction so I replace the pan/filter and connector sleeve only after first resolving the shift issues.

Cheers,

Don

 

Thank you both very much for the detailed information.