What Auto box was fitted to series3

[Yeldaw]

Hi I am trying to find out what auto gearbox is fitted to my 1972 V12 series 3. The mechanic seems to think they were fitted with the GM400 box but looking at the shape of the sump I think I have a Borg Warner model 12 box. DOes anyone know what box was fitted as standard. I can't see a gearbox number and am not sure where to look for one. If I have the model 12 box any idea where I can get the correct sump filter without having to buy the adapter @ a cost of ?70 a go.

[D COUPE]

They were fitted with the borg warner 12.

The TH400 (still 3 speedauto) was fitted to the
xjs and some xj models.

DC

[Yeldaw]

Thanks I thought the sump gasket looked like the bw 12. I just need to find the sump filter now

Dave