Axle cuffs leak – Do I have to change joints?

Moin, my Corolla E10 has been leaking an axle cuff since I bought it. That’s about 3000km now, and since I want to change oil, brake fluid, brake pads at the back and possibly also brake drums (look at them) soon, I’ll change the cuffs there too. My problem is now: I don’t know exactly when the cuff has leaked. So how long has fat been dripping out, how much dirt is already in it. As I said, 3000km on every fold. l, at the moment the car is at almost 94700 (with 95000 oil changes – the intervals are slightly shifted due to short distance) and I bought it with 92000. Last TÜV test before was September 2003, since this has not yet been noticed (but now when buying at the TÜV test already). The big question is now: Has the joint endured this? 3000+ km with bad lubrication, possibly still dirt (is only a crack, but still… water comes in everywhere) and partly fast motorwayfa hrt. No noise does it, the driving feeling is as always, car doesn’t move… What do you say? MfG, HeRo P.S: Unfortunately, I can only open and look up badly, because I have to pay for the stage and also the parts don’t get here on the island, but only at about 100km distance or via the Internet.