I currenty sit at 180,000kms, and believe the previous owner(s_) never changed the transmission fluid. The car runs fine, but I occasionally catch it slipping / hard shifting, especially when the weather is hot, the car's at full temperature, and I'm driving in the city with lots af stop and go's ... Going from R to D, is especially hard sometimes. Am I looking at selonoid change here, or will some new fluid aleviate this behavior?
I have watched every youtube video under the Sun how to do the drain and fill, that is not the problem, but I have a hard time deciding on which oil to buy. The OEM Volvo oil, or Aisin Type IV that sells locally for half the price.
What do you guys put in your cars?