Tranny fluid

[jagvette]

OK as you guys were so helpful on my previous question here is another one I have a 2006 S Type R I am changing the transmission

filter and solenoid block then refilling with fluid (yes I have done S Types before) BUT I keep reading I should

use Pentosil fluid number 1 does anyone know if I must and if not and I use regular ATF ?

 

Thanks in advance.

[LairdScooby]

I believe the later S Types use a ZF gearbox so you should be fine with a Dexron 6 fluid or equivalent.

Is there a reason cited for the use of Pentosil #1?