GPX with slushbox. It’s not bad as far as ’90s autos go, it does engine brake, it will rev and bounce off the limiter and you do have the option of a semi-automatic, although I did find letting it do it’s own thing was better for most situations. Shifts can be very quick, but were variable to say the least (decent oil might improve it?). Oh, and it’s also a 4 speed, gears felt very long. I think the newer boxes are five.
The gearbox is also reportedly made out of chocolate, there was a receipt in the file for a recon at £1000 (about 10 years ago).
It’s a unique, but not very special drivetrain package.