I recently bought an 88' Samurai soft top.  Under the hood is stock but the drive line is not. So my question is about my rear differential.  The man I bought it from said it had a full time locker in it because he trailered it to his off road destinations.  It is definitely locked full time as it chirps on pavement when cornering.  On the gas or coasting into the turn.  No noise comes from it under any circumstance on the pavement  and it works as it should on the pavement.  Will I damage it in the long run if I drive on the pavement to my destinations? Does anyone have an idea of what kind of locker it could be. I cannot find any info online or at the local 4x4 shop about what it might be. Me fear is that it is welded. Before I rear into it I just want some experienced opinions on my ride. And if you need more details about something I'm leaving out please let me know.

I meant to say it works as it should on the dirt.

If it’s full time locked it’s welded.  The whole point of a locker is to make it drive on pavement.  Either way you can drive on the road.  The tires don’t love it but I drove all over with a Lincoln locker. 
Lockers can click and chirp.  Not sure if they can be adjusted. 

Lockers can click and chirp.  Not sure if they can be adjusted.

Some can't, some can - it's a time consuming task, typically done by adding/removing shims behind the side gears or couplers.  I have seen reports of spooled vehicles regularly driven on pavement "wringing" the drive shaft splines, but, who knows if that was caused by the use on or off road, because if it's locked and used off road, there's a pretty good chance is going to be driven hard.

To Scubaralf - you're asking us to guess what some previous owner installed in your rear axle - there are "spools", which are essentially a chunk of metal with no differential capabilities; there are welded differentials (sometimes known as Lincoln lockers - after the Lincoln welding plants) which are differentials that can no longer differentiate; there are selectable lockers, which the driver can lock and unlock and there are several different styles of non-selectable lockers, or auto lockers, which supposedly lock & unlock themselves as necessary - typically they are locked until they are forced to unlock by one wheel turning faster than the other as the vehicle goes around a turn.

This last type can be considered a full time locker as it is always engaged, or, as Phase change has suggested, a full time locker would be a Lincoln locker or a spool - my point is - there's no way we can do anything other than take a wild guess as to what's in your car.