My grandparents have an 84 Cressida which is having overdrive issues.
When starting the car from cold the box seems to change 'OK' (albeit won't change into overdrive till about 3,200rpm at 80 clicks). Drive it around for a few minutes and stop (eg at traffic lights) and after that it refuses to go into overdrive.
Fluid levels have been checked (when warm) and are OK. Any suggestions would be appreciated.