Why dos your combo van jump out of gear and wont go in to fifth?

If your combo van is jumping out of gear and won't engage fifth gear, it could be due to a worn or damaged gear selector mechanism, a faulty clutch, or issues within the transmission itself, such as worn synchronizers or gears. Additionally, low Transmission Fluid levels or contamination can lead to shifting problems. It's advisable to have a professional mechanic inspect the transmission to diagnose and fix the issue properly.