Auto gearbox slow getting into overdrive

[Sgt.Hartsock]

i have had an 1800 Automatic with overdrive from new <2002>, it would go into overdrive from cold no problem, but these days it takes about 5 miles before it will change up, the colder it is the longer it takes, once it has been warmed up it is no problem and the oil level is ok. Any ideas please.

 

[rowdy-GTi]

An oil change may help. Maybe something a little thinner. Thats what i`d do first anyway.

 

[Sgt.Hartsock]

cheers for info will give it a try.