The car rides beautifully and will up-shift through the gears no problem. The issue comes when with I mash on the gas and the trans will not drop down to a lower gear. It revs to red line and feels like it slipping between 5th and neutral. If I let up off the gas to around 4500 RPM it will drop and into 4th and I can mash the pedal again to get the speed i need. I just filled the transmission with fluid so its not low. What could be causing this?

Thanks

 

Did you fill it at the right temperature and so forth?

 

Look at this thread on Transmission drain and fill has weblink to DIY and JTIS step by step instructions:

https://www.jaguarforums.com/forum/x...ter-r-i-61563/

Jim Lombardi

 

Yup, I followed those instructions to the letter. I'm wondering if I let too much fluid drain while I was fumbling with the plug. Burned my hand up good too while in the process. I think I'll go through the steps again and maybe invest in that dip stick adapter I have read about.

 

Tried something new today. I needed to pass a truck but was a worried that I couldn't get the power in time. I moved the shifter to 4th manually and it dropped gears instantly and off I went. The transmission seems to be fine but there is something with the auto kickdown that is just not working. Where should I begin trouble shooting now?

 

If the kickdown system is the same as XK's it may just be the kickdown switch, either adjustment or faulty.