VigorousBrando Posted September 7, 2009 Author Share Posted September 7, 2009 I don't know how much help I can be here, because this was one of the first things I addressed with my car and the memory is hazy on how I took care of it. When I did flush was done back in 2007, I decided to do a full flush instead of the progressive approach at the advice of my father. We did this to get it running on T-IV only. I also took the trans pan out to clean out the magnets inside thoroughly. I think I replaced the pan because we wanted to get rid of as many contaminants as possible. I don't recall there being any additional filters beyond those magnets I worked with... In any case, my tranny has been fine since that flush. I've driven ~32K (now at 223k on the car) with no noticeable slip-ups or problems. Quote Link to comment Share on other sites More sharing options...
bigange9012 Posted September 14, 2009 Share Posted September 14, 2009 I have 173k on my car and my tranny seems to be going from 1st to 3rd , I getting lack of power after that gear change. When I downshift it into 2nd it powers up again. Sometimes I will floor it at 65mph and it won't even downshift. These symptoms don't happen all the time , only sometimes. When the car is cold it runs fine until I drive for a half hour or so. My tranny oil seems to be redish brown. Any suggestions? Quote Link to comment Share on other sites More sharing options...
VigorousBrando Posted July 5, 2011 Author Share Posted July 5, 2011 Hey everyone, another update. My SC400 now has ~232k and it has been almost 4 years since we did the transmission flush. This original transmission Lexus thought was dying is still in the car! On a routine inspection today though I found the T4 ATF fluid needs to be replaced again. It's not red, rust brown, brown...it's black. My dad took a look at it and we've decided to do something about it this week. Looks like some of my college graduation money is going toward preventive maintenance on what has been a pretty good college car. :) Results: Flushed 10 quarts OEM T-IV ATF through the entire system, 2 at a time. I thought it would still be somewhat black when we were all done, but the fluid now is still a clear red after driving it around a couple of weeks. Transmission shifts smoothly and I haven't had any problems with it so far. So, for me at least, the full T-II to T-IV replacement we did back in '07 (all at once rather than 2 quarts at a time) has led to no repercussions. For all I know though, it may have originally had T-IV in it when I bought it... Quote Link to comment Share on other sites More sharing options...
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