Jimmay

I was wondering if anyone has replaced this on their 1st gen RL. Is it part of the knuckle? From the looks of it on oemacuraparts it looks as if the balljoint comes pressed into the knuckle and id just swap out the entire assembly. I know there was the TSB on the lower ball joints, and it was done on my car, but it has 177k miles now and things are starting to wear our. Any help would be great. Thanks