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> From: rawaudi@frugal.com (Robert Wheeldon) > > Does anyone on the q-list have an opinion about switching to synthetic Auto > Trans fluid. I'm considering it but I cannot (won't spend the money) drain > the torque converter. My thoughts are drain and re-fill the trans several > times until I end up with something better than a 50/50 mixture of original > fluid and synthetic. Eggs-ackly. > Questions > > Will regular AT and synthetic AT mix? Yes. Limits advantages of synthetic, but drain all you can and you're at least 30% synthetic on the first change. These oils are compatible and work together just fine. > Is there any advantage to synthetic AT fluid? Absolutely. Primarily in three characteristics: 1) It dissipates heat better than petro; 2) It resists breakdown from heat better than petro, therefore lasting longer; 3) It is even more detergent than petro, assuring no buildup of varnish will take place. I run Amsoil synthetic in my 1990 200. > Is there any advantage to mixed conventional and synthetic AT fluid? It's better than 100% conventional, not as good as 100% synthetic. > Is there a way to drain the torque converter short of pulling the transaxle No. Best way is as you describe above - do about three changes, draining all you can each time. Drive for days in between. You will eventually have a very high ratio of synth-to-petro. My suggestion is to drain by loosening the large nut on the dipstick filler tube on the left side of the drain pan. DO NOT cross-thread this nut going back on!! +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Al Powell, Ph.D. Voice: 409/845-2807 107 Reed McDonald Bldg. Fax: 409/862-1202 College Station, TX 77843 Http://agcomwww.tamu.edu/agcom/satellit/alpage.htm "Some people can tell what time it is by looking at the sun...but I have never been able to see the numbers." [From 5th/6th grade essays....]
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