Automatic Fluid top up

[Malenibo]

Hi I will be fitting an external oil cooler to my Surf next week in readyness for towing my caravan. The cooler fits it after the the oil has been through the rad cooler and fitting increases the oil capacity of the box by about a litre. Can any one recommend a brand for top up that would not possibly cause a problem by mixing it with the original.

[gemini]

Hi I will be fitting an external oil cooler to my Surf next week in readyness for towing my caravan. The cooler fits it after the the oil has been through the rad cooler and fitting increases the oil capacity of the box by about a litre. Can any one recommend a brand for top up that would not possibly cause a problem by mixing it with the original.

any atf fluid will be ok

[Malenibo]

Thanks, I asked the question after reading Scousy's post re problems with the brake bands after changing the fluid. I have not had the opportunity to tow my caravan with the Surf but as I have always fitted an extra gearbox oil cooler to all the autos I've had I thought I would jusy do it.