88.5 Tin Top with an 89 Sidekick 1.6.

I went out and did some light wheeling, through water, some mud and sand.  Well, I parked it for a week or so.  When I got back into it, I drove out my driveway and could not shift into 2nd.  I pushed in the clutch and pulled over.  What I noticed is the vehicle was still moving with it in 1st gear and clutch in.  I went back home, jumped in my other vehicle and went to work.

Now the question:  What is causing this?  I first thought it needed an adjustment, then I thought if it was to loose I couldn't get it in gear.  The pedal feels somewhat the same as before.  I took it out last night out behind my house and could finally shift it into 2nd, sometimes if "everything was lined up".  But, when I stopped, it still would move with the clutch in.  I don't think this makes a difference, but when the transfercase is in N, I can run through the transmisson's gears just fine.

Thanks in advance.

A common problem with tractors is that the rust will freeze the clutch mechanism.  Just how it happens, I don't know.  Since you were wheeling through water and then let it set for a while, I would suspect you might have the same problem.  When that happens with a tractor, some recommend trying to push something immoveable, hoping that will break things free.  Others say that is a way to break something.  I am not familiar with your vehicle, but is there an cover you can remove to inspect the clutch?

I think he means that rust will stick the clutch
disk to the flywheel and/or pressure plate, if you
drive it for a while, whith the clutch pushed in
it will probably break free and all will be right
once again

Wild

The trans could be full of water/mud like gear oil