Transmission Failure/Limp Home Mode

2001 XJ8-VDP, Getting “transmission failure” & goes into “limp home mode” when I shift into manual shift mode/left side of j-gate shifter as I go into the step down of the rears.

No other indication of abnormal shift or any other indication of trouble.

If I shut down and restart, the “transmission failure” on console goes away, check engine light remains lighted but car/trans performs normally until go into manual shift mode again.

Running the shift lever through all the manual gear selection positions several times seemed to help but I’m concerned the Jag is going to leave me stranded in “limp mode”

When I first purchased the vehicle [2004] … went into permanent “trans failure/limp mode … dealership replaced transmission three times under warranty … then on last change stated “pin in the wiring harness bad connection” about $30k worth of warranty work at Jaguars tech support desk suggestion. My first question when the problem occurred was " is there a possibility of an electrical problem from a sensor or wiring?” Three months in shop!

It’s out of warranty NOW!!

Anyone else experienced similar or have thoughts on cause[s]?

Thanx,

Ray H.

D4 micro switch in the gear selector.
Cam plate fault or micro switch???

bob

I have 1995 XJR 107,000 KM and my transmission goes into limp mode for no apparent reason. I have replaced the solinodes , Internal wiring harness,and checked voltage dipping, all by a transmission specialist. Any ideas ? only codes I can get is P1775 $51. Motorcarman do you it could be the micro switch?
Snowball

P1775 only means that the ECM is telling you that the TCM has DTCs logged.
What DTCs are logged in THAT module???
Asking the Engine module is kinda useless.
You will need equipment to read a 4L80E TCM.

4L80E_GEARBOX.pdf (62.2 KB)

bob

Thanks , will see what I can do.
Snowball