I am trying to replace the OEM antenna on my 99 NSX with a new OEM antenna. The motor is good just need to replace the antenna and I have verified there are no pieces of the old antenna cord stuck in the retraction area. My problem is that when I insert the plastic cord with the notches, the antenna retracts fine up until the sliding metal sleeve piece needs to go inside the metal tube part that sticks up from the car. I have watched YouTube videos and in the videos the sleeve piece fits right in, but my sleeve piece does not fit. I am using the OM factory antenna, part number 39152-SL0-A01. My local Acura dealer tells me there is a special tool and wants to charge me 2.5 hours labor to install the antenna, for what as far as I can tell, should only take 5 minutes. For the life of me I cannot figure out why the antenna sleeve does not fit in the tube. See pictures. The part my left index finger is touching is the part that does not fit in the tube shown in the pic of the car. Any suggestions are greatly appreciated. Is anyone aware if there is in fact a special tool to get the sleeve to fit? I am not talking about the tool to remove the nut on top.