I'm guessing corrosion or electrolysis? Having replaced mine, I understand. Most VP (SX and/or DP1995-2006) transom assembles will work. They use 2 more upper bolts on the 2000 and up models, but all uppers and gimbal housings will attach.
I looked on ebay, called local shops and did searchtempest...in the end, calling marinas and boat shops yielded the final result. My used transom is the older style (1996-97) and save for the 2 upper bolt holes that the 2000+ models have bolted right up. I filled the holes with marine caulking and haven't had any issues with stress nor leaks. I replaced my gasket at the same time. The hydraulic cylinders use different rods/shafts through the out-drive, so the newer style will not work. If you buy the whole assembly, they usually come with transom shield, gimbal housing, rams, and hoses.
Michigan Motorz has a factory
LINK newer one for $4K...I didn't want to spend that much given that I also had to purchase an upper and lower (I got out of California for $2,500 + shipping from a guy who repowered his 2003 boat).
I've changed computers so references numbers would be work for me? volvopentastore.com has all the part numbers,,,you just have to look up you model(s).
Good Luck! I am also curious as to why you have to replace them?
Cheers,
Brett
