[Closed] fox 32rl knocking

my fork is make a knocking noise over bumps...
its not headset..
i took the fork out and put it in my brothers bike and it still does it..so i "thought" i narrowed it down to fork

sent it to TF Tuned who serviced and its come back saying bushings are installed fine and are ok...changed wiper seals, oil, and modified damper cartridge to reduce noise.

and its still bloody doing it...

its not front wheel as i used my brothers front wheel when i put it in his bike
or headset
anything else it could be??
HEELLP