I have an 04' Supra with a Boatmate trailer with the torsion axles. I noticed when I had it off the trailer last week that there was a serial number tag on top of each axle. Its hard to see with the boat on the trailer. My particular axles were manufactured by UFP, San Marcos Cal. and Winchester Tenn. I believe they are now owned by Dexter Axle. Do a search and you will find them. Each of my axles had a serial number of A84650 & A84630. I would call them direct with your serial number and bypass Supra/Boatmate.