Front axle HELP!

[ukdkbr]

Ok I have a strange problem that is really starting to annoy me. I had work done on my front axle, 4.56 gears, and a detroit trutrack. Since then I have not been able to get into 4wd. It shifts into low range and "feels" like it is in 4wd but no power is applied to the front axle (rears will spin but the front stays still). I have tried to take the rear driveshaft off and put it into 4wd to see if it would move with just the front driveshaft connected and I don't go anywhere! I swapped out my transfer case and still have the same problem, so I think I have isolated the problem to the front diff.

Does anyone have any ideas as to what could be the problem? Anyone have some troublshooting tips I could do to narrow down the problem? I opened up the front diff and there arent any broken pieces in there and when I'm driving I don't hear any grinding or anything in the front end, just no power to the front axle in 4wd! Pleas give me some ideas! Thanks!

-Joe

 

[MoparManiac]

You failed to mention what year your jeep was. I know it sounds simple but you don't have vacuum disconnect do you? I think the older jeeps up to '91 had it. So if that's it then maybe the shift fork broke (happened to me twice).

 

[ukdkbr]

Whoops also failed to mention this: I had my passanger side axle converted to a 1 piece (I had the shit fork welded into the engaged position).

But even if it was something like the fork being broken wouldn't I still get at least 1 wheel to spin (drivers side?).

88', 5-speed, NP231.

 

[lawsoncl]

With the xfer case in 2wd, can you grab the front driveshaft and turn it?

 

[PAPXJ]

So when you have the rear DS off and you put it in 4wd, does the front DS spin?

 

[O.D.]

Check your shift linkage.

 

[anony91xj]

Put it into 4WD and put all 4 wheels up on jackstands. Have a friend sit in the driver seat and put it into gear. See if both the front and rear driveshafts spin or just the rear.

My money's on a problem with the axle disconnect, welded or not.

 

[Matthew Currie]

Whoops also failed to mention this: I had my passanger side axle converted to a 1 piece (I had the shit fork welded into the engaged position).

But even if it was something like the fork being broken wouldn't I still get at least 1 wheel to spin (drivers side?).

88', 5-speed, NP231.

No, if the fork broke, only the inner driveshaft of the broken axle would spin.