[Kev0607]

Hi,

I'm planning on doing a drain & fill of the transmission's on my car (S80) & my Dad's V70 (both P3 shape). Both cars require JWS3309 fluid, which I'm aware of.

Would you recommend doing a drain, filling it back up & driving for say 1,000 miles or so before repeating the process. Or, would you just advise draining & filling all on the same day until the fluid becomes its original colour?

I understand that you can only get around 3L out of the transmission at a time via the sump, due to fluid being trapped within the internals.

I'm going to get one of the 20L drums on Ebay made my Mannol, as that'll do both vehicles.