Recently not changing gear at 3000 revs auto gearbox never had problems before

Due to the complexity's of today's vehicles, the vast majority of owners or DIYer's do not possess the proper diagnostic equipment nor the knowledge and training that's required to effectively and successfully perform their own automobile troubleshooting / repair. Therefore it is highly recommended to seek professional *hands-on* assistance with this issue as that tends to be the most cost effective and reliable solution.. Unfortunately It is impossible for us to determine what the actual failure is here 'online' .. We could post a 'list' of the possibilities - however that isn't going to help due to the fact the same diagnostic equipment and troubleshooting knowledge is still going to be required before a logical repair strategy can be obtained. Good luck! Recommended: ▪️ https://repairpal.com/repair-shops ▪️

Other than checking fluid level and condition, there is simply not much you can do without a professional analysis using a diagnostic tool and referencing a shop manual.