Alright, i made a post about this squeak my jeeps been making a few weeks ago, but i only asked for the name of a part.

My '92 Sport with the 5 Speed manual, which i suspect is the AX-15, sometimes makes a squeaking/chirping noise when the driveline is under a heavy load (Meaning accelerating or decelerating with the Engine. But never when coasting or just holding my speed). When i first start driving, it'll be there every time i let off the gas a little to slow down. Then it'll stop completely for a few miles then come back. Only when it comes back, it does it when I'm accelerating as well. Also, before i noticed this i heard a low rumbling sound at high speeds (45mph up) when decelerating with the engine, but i can't tell where it's coming from. I can feel this rumble in the floorboard, and it still does this to date at high speed.
This all started after backing up a steep driveway in 4low with a load, since i was helping someone move. I was in 4 low so i didn't torture the clutch, and i was trying to be gentle with the clutch but i jerked it a few times.

I first thought it was the Throwout bearing inside the tranny, which would make sense because it hasn't been replaced yet and I'm at 217k miles. But when i took it to my Mechanic, he said it could be that(Throwout), a gear, a U-joint, or the Speedo cable. I ruled out the speedo cable, since it's an electronic speedo.

I have plans to have him fix it if it's major (I.E. have to drop the tranny), but i will fix it myself if it's just a U-joint or a pulley since he's backed up in work (One of the mechanics broke his wrist). Any clues what it could be? Any opinions would be great!

 

Thanks to the efforts of a local punk (Who is now in Juvenal Hall), i rediscovered the grease zork on the forward U-joint of the rear drive shaft is missing, so that joint hasn't gotten grease for a while. Found this about a year ago, but forgot to fix it.

Anyways, could that be the cause of my chirping (Worn joint from no grease)?

Also will i be OK driving about 1.5 miles with my T-case fluid at half? Those local punks i mentioned tought it would be a great idea to undo the bolts on my drive shaft, so it fell off this morning. And i can't get the dang plug off to fill it.

 

For sure sounds like a bad Ujoint to me. Also you should be ok to drive just that far. But top it off ASAP and avoid drivin it too much before that