The OEM manual says the Transmission...

[RRPhil]

That ‘inventory optimiser’ fluid claims to be suitable for the ZF 6HP26 (Shell M1375.4/Ford Mercon SP), the GM 5L40-E (BMW ETL-7045E, ETL-8072B) and the ZF 5HP24 (BMW LT71141).

Having seen the (disastrous) consequences of filling a 5HP24 with Dexron on a number of occasions, the correct fluids clearly use different friction modifier packs.

I’m 100% with JCL on this one.

Phil

[JCL]

Originally Posted by RRPhil

That ‘inventory optimiser’ fluid claims to be suitable for the ZF 6HP26 (Shell M1375.4/Ford Mercon SP), the GM 5L40-E (BMW ETL-7045E, ETL-8072B) and the ZF 5HP24 (BMW LT71141).

Having seen the (disastrous) consequences of filling a 5HP24 with Dexron on a number of occasions, the correct fluids clearly use different friction modifier packs.

I’m 100% with JCL on this one.

Phil

Thanks for your comments. I think what some posters don't realize is that due to the characteristics of the friction modifiers many fluid specs are mutually exclusive. It is impossible to meet multiple specs in some cases. But it is possible to design an average fluid for multiple specs. It won't meet them but many owners won't care