topichka Posted October 1, 2006 Share Posted October 1, 2006 Hello All, I have an 01 GS430--runs great and has 123K on her. I purchased the car with 56K on her and have done the 60K service, timing belt/water pump change, as well as oil changes at 5k miles. At 88K miles, I took it to Jiffy Lube to have the transmission fliud changed as I didn't know what the previous owner had done. Jiffy lube put in Penzoil ATF. THIS WAS BEFORE I READ THIS FORUM! So, my quesiton is what to do now. I know, from reading this forum, that I should be using Toyota IV only. The cars still shifts nice and smooth but I'm trying to keep this car running a long time. Should I drain out the old fluid and replace it with Type IV? Should I do it gradually, drain and refill over a period of time or do a complete flush? Or, should I just let her be since everything still runs well and shows no signs of impending danger? Much thanks! Quote Link to comment Share on other sites More sharing options...
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