Thoughts Gentlemen? Castrol Import Multi-Vehicle ATF product information says it is compatible with a lot of vehicle requirements (specifically Toyota T-IV and Dexron III H, but not Dexron VI). I'm going to change the P/S fluid and have some Castrol M-I left over from transmission fluid change. The P/S cap calls for DEXRON, no suffix. Anyone see issues in using the Castrol M-I in the P/S of my '04 Sienna?wag said:In the case of the early gen2 3.3L Siennas, the power steering does NOT use the same fluid as the automatic transmission. The transmission uses ATF Type T-IV while the power steering uses ATF DEXRON II or ATF DEXRON III so you WILL have to stock two different fluids.wiswind said:Your power steering system uses Automatic Transmission Fluid (ATF).
Do NOT use power steering fluid....(I had some Redline Power Steering fluid that IS ATF).
Use the same ATF as you put in your tranny (no need to stock 2 different fluids).
Toyota does not recommend changing the power steering fluid but the fluid does get quite hot and I guess it can oxidize and degrade to a certain extent over time just like ATF does in a transmission so it might make sense to change it since it is so cheap and easy to do.
Also, there's the Castrol "High Mileage" http://www.castrol.com/liveassets/b...ING/local_assets/downloads/p,q/pds_HM_ATF.pdf