Are most low viscosity transmission fluids similar?

[BMW Dom]

Are most transmission fluids similar in their makeup?

Is this why most universal ATFs are applicable for many transmissions?

Why are some transmissons picky about fluid, and some not?

 

[Oillover]

 

[DougR]

 

[BMW Dom]

very helpful, thankss

 

[Gimpy1]

I'm sure molakule will chime in, but just a note suitable or meets are very different than OEM specifications or approval.

 

[BMW Dom]

I'm sure molakule will chime in, but just a note suitable or meets are very different than OEM specifications or approval.

I'm aware. Most OEMs don't approve other ATFs.

 

[xgmad]

Thinner atfs are there for less parasitic drag to increase fuel economy.

If it is too thick the valve body will have a hard time shifting and so fourth, because atf is also not only a lubricant but also used as a hydraulic fluid to shift gears.

Im quite sure Aisin recommends using a slightly higher viscosity in their automatics for better protection and less breakdown of the ATF.

As to why some transmissions are picky on what they run, some designs I believe in the valve body need that specific viscosity in order to achieve their goals such as shift points and limited slippage of the clutch packs (friction modifiers)

 

[Rand]

Are most transmission fluids similar in their makeup?

Is this why most universal ATFs are applicable for many transmissions?

Why are some transmissons picky about fluid, and some not?

A Generic trollish question. congrats. Its also been discussed recently at least 3 times.
No one can answer this question satisfactory.

You would be a little better off sticking to a specific questions such as. Will work ok in my

Perhaps next topic should be thick vs thin motor oil? That hasnt been covered well.

 

[2EHA]

you know the answer to this….