1994 chevy burban front axle PLEASE HELP

[seza]

Hi all,
My 1994 K1500 is leaking oil from front diff from the seals mostly around where the left output shaft connect to it,
Also there is a slight play on the same shaft.
It all started over a year ago when I went on the highway at high speed with 4x4 mode still engaged which cause clancking noise and oil and smoke to come out of the diff, when I stopped I managed to dis-engage 4x4 and continued driving ok.
The car been driving fine ever since but lately I reffiled the oil which came out after about 100miles highway driving,
Other than oil there is NO noise or whining.
Because I have a long drive this week I won't be able to open it, my questions:
1. For lubnrication can I just inject some grease inside for the time being? If so what type?
2. Is it safe to continue driving with it as it is? The fact that there is play in the shaft does it mean the bearing is shot?
Does that mean it could be eating into the shaft?

Your help is greatly appreciated.
Thank you

[RyanbabZ71]

No need for the same post in multiple areas. please see the transaxle/suspension area for the open topic.