So... Dexron III and r380...again

Ok, I've installed my Ashcroft R380 and filled it up with Dexron III according to Ashcrofts recommendation.
They say they find Dexron III to be better than MTF94.

Gearing is a little notchy, and there is vibration while driving (I feel it by holding the gear lever)
Is this normal? Must admit i haven't fine adjusted the bias springs yet...

The guy who helped me with the gearbox change (gearbox/engine overhaul professional) just shook his head when I showed the Dexron III, told me that oil is too thin for using in that box.

Anyone with experience who can comment on this? What could possibly happen? Damage?
Ashcroft recommends a "Good" Dexron III. What defines good here?

Answers much appreciated. / Confused Swede

I personally go with MTF94 (i think Land Rover recommend this) or sometimes difflock evolution 1

ashcroft recommended mtf94 for my new r380 off them last year

johnlad said:

ashcroft recommended mtf94 for my new r380 off them last year

Click to expand...

Yes, it's still labeled on the box upon delivery but on their faq they now changed to dexron. Also got that confirmed from dave ashcroft via email