TL 80 stuck in 4 WD

[tabs13]

Hello everybody,
my New Holland TL 80 2002 will not disengage from the 4 WD. The indicator light at switch is not working.
I would be very grateful for any suggestions that will help me find the source of the problem.
Thank you!

 

[Walter S]

On my '04 tl90 the 4wd worked fine but the indicator light stayed on. Had to replace Hyd pressure sensing switch on hyd line next to trans under cab. $65 for part.

 

[RickB]

On my '04 tl90 the 4wd worked fine but the indicator light stayed on. Had to replace Hyd pressure sensing switch on hyd line next to trans under cab. $65 for part.

Very, very common, and more than likely the case here.