Geartronic judder in drive uphill??

[vtl]

The 8218 type (basically the cheapest on ebay)

CSt@100 6.87, too thin for this application, IMO.

[Willber]

Ive never heard of this metric before (and just googled it with no results) could you elaborate? Thanks for the advice by the way, it is appreciated! Wondering if I should bite the bullet and move to Volvo (or as close to) fluid with some Lubegarf

[Willber]

Febi 29934 is another JWS3309 compatible fluid, but unsure if its better than Mannol. Ive always had success with febi parts before

[vtl]

CSt@40 and @100 are two viscosity points (at 40 and 100 degrees Celsius) that allow you to predict viscosity at any other temperature point.

Volvo ATF has viscosity at these points of ~37 and ~7.5-7.7, if memory is not lying. Staying closer to Volvo viscosity is best.