Damlier Soverign van den plas auto box problem 1985.

[PMwrx]

Hi all,
same as xj6 auto box i think. 3 Speed auto. Will only creep forward. Reverse no problem. oil level ok. I did a few searches but no luck finding anything. What do you think ?
Thanks

[kamilb1998]

Where abouts are you? Maybe get a specialist to take a look at it?

[PMwrx]

Dublin