1997 Ford Escort fluid leak

1997 Ford Escort Manual 67,000 miles

hi there my ford escort has yellowish fluid leaking from side of gearbox. The gasket and cap have been fixed and also sealed. The garage had it sitting over night with no leak but as soon as I drove it home and left it over night there is a leak. It has been nack to the garage 3 times but still has leak. You can see it dripping from gearbox. Any suggestions what this could be would be really helpful as hubby is fed up and wants to get rid of car. Many thanks.