Gid'ay Rich welcome to the group.
The main thing that you need to check out is the transmission. It is a 92 model with 50k on it. Some of the early models came with a lining on the lock_up clutch, that would flack off. The small pieces of facing tended to flow into the ATF cooler in the bottom of the radiator, to block the flow of fluid that is used to lubricate the gear train in the box. The result is, the gear train wears out from lack of lube. We don't know when the factory corrected this problem, it appears to have been some time in 93.
I would have an Auto transmission specialist, check for any. pieces that may be blocking the ATF flow through the cooler. If the cooler flow is blocked, the transmission is suspect, as it may have been lacking lube to the gears for sometime. If the cooler is not blocked but has pieces of lining in there, I would have the cooler flushed out to clear it and fit a ATF filter to the inlet side to catch the lining pieces. I would also get the pan removed to clean the screen in there of any crap. If this is done you should have no trouble from this common problem.
The other problem that tends to destroy the box is when the brake band needs adjusting. The effect of this, is a flair or slipping as it changes from 1st to 2nd or 2nd to 3rd. The transmission has an adjustment on the side of the box to adjust the band. This is a small job for a service dept. Doesn't cost much, but if the band is not adjusted, and it is continued to be driven, it will destroy the box.
There is a lot written about how the box generates a lot of heat. This comes from the before mentioned blocking of the cooler, and from the torque converter.
The SVX is a high speed touring car, to this end it is fitted with a very high diff ratio. When you are driving around town, the torque converter has to do a lot of work, to lower the gear ratio. This produces a lot of heat, thats why the oil is cooled in the radiator. To prevent this drive it in third gear unless you are up and running at a cruising speed. This will lower the ratio from 2.5:1 to 3.5:1. The car will respond and accelerate better. The transmission will last longer, as the gear train is locked together, spinning as a single unit.
Other than that, get a warranty on it and get the work that I have outlined done to establish the condition of the box. If it turns out that the cooler is blocked and the box is stuffed, You can get replaced under the warranty. Just ensure that the cooler is cleared if they replace the box, so that it does not happen again, a lot weren't so the replacement box failed too.
Follow Mr. Pockets advice on fitting a cooler and do a bit of ATF sniffing, brown or burnt smelling ATF spells trouble. I hope I have not put you off but I have seen a lot of cases where these things have been ignored and the transmission has been blamed as weak,frail. This box is as strong as any other auto, and there is no reason that it would not be as reliably, as the rest of this great car.
All the best, look forward to your SVX.
Harvey.
