Knocking noise in reverse gear in Sportero

[Slick84]

I have an automatic Sportero and when I put it in reverse gear,i get a "thump" in what seems to be the transfer case...there is no grinding noise in Drive or Reverse,only a "thump/knock" when I put the gear in reverse.....anyone can help or advise me what to do or where to go?

[Slick84]

I changed the both Crosses on the driveshaft,just to be sure....but the noise is coming from inside the transfer case when reverse gear is put in

[gtr_fever]

could be the reverse drum

[Slick84]

A mechanic said it's the bearing in the transfer case so that has to change

[Slick84]

Rear output bearing in the transfer case....transfer case has to come down and the bearing needs to pressed out and pressed back in