![]() ![]() The upside to the TES-389 fluids are that you are truly getting a performance guarantee. It will work very well in your older tranny. If you want a reasonable performing fluid for moderate money, the choose any of the Dex/Merc products available from a quality brand name you recognize. Crafty1 could perhaps expound, but I'm not far off the mark, if at all. That helps keep costs down!Īllison created the TES-389 spec to assure performance standards that used to exist with the Dexron III criteria, and added some seal compatibility criteria, if I'm not mistaken. If you are replacing your 700r4 transmission filter, you will need transmission fluid as well.If you are ready to purchase, you can check you online. The upside to this duplistic approach is that the market can make one fluid to meet both specs. Techinically, neither "Dexron III" or "Mercon" are licesned any longer, but the chemistry lingers on, in the aftermarket. Hence, the aftermarket's approach to "D/M" "Dex/Merc" "D3/Mrc" and so on. However, if you truly want the best setup, you'll have to go bypass which will remove particles smaller than 2 micron.The whole "double fluid" issue you refer to is actually to your benefit.įord's "Mercon" and GM's "Dexron III" were so incredibly similar that they can easily be considered one fluid. the permacool setup reduces particles in the 10 micron range. Its filtration capacity is maybe 50-100 microns. Stock filter is acutally pretty useless- only captures big chunks. The permacool filter is any regular ford FL1A filter. ![]() The stock filter is around 25-40 dollars, depending on where you go. ![]() I've added in an additional inline filter from permacool. Every year, drain fluid, drop pan, change filter. You can actually get away with Partial changes like this, which works pretty well. The rest of the fluid is in the lines and torque converter, and in my opinion, not worth the effort to get out. You probably wont use over 2 gallons though. IIRC, overall fluid capacity is over 8 quarts. Transmission Fluid Included: Yes Transmission Fluid Quantity: 3 gallons Input Spline Quantity: 30 First Gear Ratio (Automatic Transmissions). (you'll see how much of a POS GM was to not put in a drain plug). I'd install a drain plug in the pan to help you out for the next drain. This was somewhat true in the older days, but I dont think it applies to the 700R4.Īlso, in terms of filter changes, you will have to drain and drop the pan regardless- thats good for about 6 quarts or so of fluid. I've heard that as well, but really question the logic of it. ![]()
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