Originally Posted By: HosteenJorje
Originally Posted By: brslds
Wouldn't escape through the dipstick tube?
ATs have a vent to atmosphere to accommodate the fluid as it expands with heat. Without the vent, the pressure would push the ATF through the seals.I'm referring to my Camry. Other manufacturers may have a different arrangement.
Where is this venting port located?
The only venting port I am aware of is via the dipstick,
but again, you need to get to a high temperature to drive off any moisture and the average ATF temp doesn't get high enough to do that.
Quote:
An AT transmission has NO PCV system to draw off vapors.
In an engine, the crankcase environment is slightly below atmospheric pressure in order to suck up moisture vapors BELOW 212F.
An ATF has no such partial vacuum system.
Originally Posted By: WHitewolf
The vent doesn't make any difference because, as MolaKule pointed out, the fluid will not get hot enough to expel the water in that way.
The other point that we were trying to make is that water in the fluid causes degradation way before is is detectable by visual appearance.
I just hope that the OP is taking notice of what we are saying instead of all the other misleading rubbish that is being posted.