Sam_Julier
$50 Site Donor 2024
I maintain 4 Volvo's that spec the JWS 3309 AT fluid and perform a cooler line exchange every 20k with Mobil 3309. After each exchange there is noticeable, actually surprising improvement in shift smoothness. These are gently driven cars.
I have 2 questions:
1) Why is there such and improvement in shift performance using Mobil 3309? Is this by design?
2) Will a full synthetic fluid that meets the JWS 3309 spec work just as well or better?
Thanks in advance for your comments.
I have 2 questions:
1) Why is there such and improvement in shift performance using Mobil 3309? Is this by design?
2) Will a full synthetic fluid that meets the JWS 3309 spec work just as well or better?
Thanks in advance for your comments.