What are some causes for a disco I bring stuck in high? New to the truck side of things.

 

Transfer case shifter needs overhaul, it's common when not used often. Check out the Tech Section and you can perform a search here and it will pull all the threads that have covered it. Being stuck in high unlocked as apposed to low unlocked is a good thing. Are you unlocked?

 

Check to see if your vehicle has a interlock solenoid before overhauling anything.
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Yep, don't PM a thing before number9 tells you to do so.

 

Shifters usually rusted stuck in one position, can also be the solinoid, mine was shifter big time, also would not move left to CDL lock

 

Thanks for tossing that in after the prior reply.

Not all Discoveries are grownup rust belt babies with rusted linkages and/or cables. There are other possible causes for inoperative items that some may not have considered or encountered. Didn't see that OP specified location or history information for vehicle. Took the time to find that D1s may have an interlock depending upon market and replied do to my previous experience.

The interlock solenoid was recently preventing my D2 from going into low. Noticed it after trans/S&M light issues began, went in/out of low smoothly prior to that. Took the time to look at the system operation and suspected it was related to the trans. Changed the x,y,z switch and it cleared both discrepancies as expected.
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My solinoid was sticking , I pulled the cap on the trail , removed the wavy washer, been fine since, I would not have had that issue had I listened to scouts when my trans was out and threw out that solinoid lol

Initial issue was the shifter I had to remove, soak and beat apart with brass tools

 

Will look into do that. Not having low available made it a PIA to crawl up my ramps for mx and being stuck in low can make it a slow ride to the house.
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