Recent content by SoNic67

  1. SoNic67

    Lexus Toyota "Lifetime ATF" - baloney

    So it doesn't matter, you can fill it with water at 150 psi and transmission will run? Actually go with compressed air at 150 psi, because that's all it matters... static pressure. This is beyond ridiculous, I'm out.
  2. SoNic67

    Lexus Toyota "Lifetime ATF" - baloney

    My original statement was that in this SYSTEM, the viscosity plays a huge role. You deviated the discussion to the pump, like the pressure will be independent of the fluid viscosity. And you pointed to the pressure regulating valves that will maintain that pressure the same. I disagree...
  3. SoNic67

    Lexus Toyota "Lifetime ATF" - baloney

    You basically stated that a pump creates STATIC PRESSURE. That's false at a fundamental level. To my knowledge a pump creates fluid flow. Kinetic energy, dynamic pressure if you want to call it that way. The restrictions in the circuit create the static pressure, by converting that dynamic...
  4. SoNic67

    Lexus Toyota "Lifetime ATF" - baloney

    I am not attacking nobody, he attacked me. And while he might be a guru in chemistry, he certainly doesn't understand fluid flow like I do. I didn't tell him to go read a chemistry book...
  5. SoNic67

    Lexus Toyota "Lifetime ATF" - baloney

    I guess the miracle fluids will change the chemistry of the older transmission gaskets too, and they won't break down under temperature. I probably know more than you do. I don't need to prove anything online, I have my PE. You won't accept that pressure drop on any restrictions (around...
  6. SoNic67

    Lexus Toyota "Lifetime ATF" - baloney

    Run a pump with an open hose, no restriction. What pressure do you have on that open hose? Any mechanical engineer knows that pumps only moves fluid, creates flow, creates kinetic energy, but the actual head (static pressure) is from the external circuit and associated fluid friction. Even your...
  7. SoNic67

    Lexus Toyota "Lifetime ATF" - baloney

    Who makes that pressure? Let me tell you - the resistance to fluid flow. If there is no resistance, the displacement pump makes zero pressure. The same way, an open water hose has no static pressure inside either. Only when flow is restricted (friction pressure drop in a valve) you get some...
  8. SoNic67

    Open differential and transfer case - additive?

    It's controlled by the 4WD ECU. Connects it at starting from stop and if it detects slippage. RAV4 also has a button on dash that says "Lock 4WD", but that lock works only to about 20 mph, then disengages. Most of those Cute-SUV's are like that, no real central differential on them. Exception...
  9. SoNic67

    Mercon v, what's available?

    Ford recommended MerconV even for older transmissions that were initially specced with Mercon (it's a TSB). Like I said that's the minimum, personally I had better results with Castrol Import Multi-vehicle ATF than with Castrol Mercon V.
  10. SoNic67

    Mercon v, what's available?

    Walmart is my suggestion too. Castrol and SuperTech have MerconV. In my 2001 Mercury Sable and 2001 Ford Explorer I switched eventually to Castrol Import Multi-vehicle ATF - it's a better fluid, exceeds the MerconV requirements. My Sable drove fine 180k miles until daughter totaled it. The...
  11. SoNic67

    Lexus Toyota "Lifetime ATF" - baloney

    Fractional being 21%. So... possible reduced pressure on internal clutches/bands is no biggie? Because we have a strong fluid that protects the metallic gears? My post was about people using LV in transmissions that were not designed for that. Viscosity is very important in a transmission that...
  12. SoNic67

    Lexus Toyota "Lifetime ATF" - baloney

    Wouldn't be better to start at the SAME viscosity, as specified by manufacturer, and remain in grade? I know that, for example, AMSOIL has a normal viscosity synthetic ATF. I prefer to save money in transmissions than on a fractional gas mileage improvement.
  13. SoNic67

    Do I need to match LSD additive?

    $20 a Qt. That's not the end of the world.
  14. SoNic67

    Lexus Toyota "Lifetime ATF" - baloney

    You can do exactly the same with successive drain/refills (with drives in between) in amount of 14 Qt. None is "better" or "worse" IMO.
  15. SoNic67

    Do I need to match LSD additive?

    The 75W-110 is better for higher temps too. Valvoline 75W-90 has the lowest viscosity at 40C from the pack of 75W-90 (look on the table) and if your diff was speced to 80W-90, IMO, it's bad to use that Valvoline, no matter what you add into it.
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