Do I need a tranny cooler for cold weather cross country tri

[AstroWill]

Those guys probably don't know what they are talking about... ;)

If you read through what Haydyn says...

I have, and I will quote directly from their FAQ http://www.haydenauto.com/Installation- ... ntent.aspx

Q. Can you over cool the transmission fluid?
A. Transmissions are not highly sensitive to cool operating temperatures. However, in sub-zero (20-30° F) weather conditions transmission fluid can actually gel up in an external cooler and cease to flow, causing damage. Use of the radiator cooler actually helps warm the fluid under these conditions. It is critical in extreme cold conditions to use the original equipment cooler in series with the auxiliary cooler and allow the vehicle to warm up before driving.

If my reading comprehension has not failed on me, it states that in sub-zero (20-30° F) weather conditions the fluid can actually gel up in an external cooler and even cease to flow, causing damage ;) Then it continues to state that it's CRITICAL in extreme cold conditions to use the OEM cooler in series.

My summation is that you should always use the OEM cooler in series in most of North America, and it is CRITICAL to use the OEM cooler in series if your vehicle will ever experience extreme cold situations.

The rest I'm not even going to waste my time with.

[Lumpy]

I just want to know -

If "sub zero" is 20-30F.

What's 19F?


Lump

[AstroWill]

Those MOFOS never stated what extreme cold is, so I assume that it's anything below their 'sub-zero' temperatures that they listed.
19f is still sub-zero(in celsius) but is it extreme cold?? FiiK
Doesn't change my stance either way, but I wondered that as well.

[Lumpy]

19f is still sub-zero(in celsius) ...

Darn new math.


Lump

[AstroWill]

It's sub-zero to 95% of the worlds population :)

[Meterpig]

Lots of hypothetical thoughts here but few facts. Probably shouldn't even start your engine in negative 30 lest your motor starve for oil.

fyi...motor oil is far thicker than atf. Alot thicker.

ever tried to change your oil at negative 20? I have flows like honey. That was after I poured atf into the crank case to scour out any old oil. It flowed like water. Sorry guys..just don't add up. Does your tranny starve the first few miles.at sub zero?



We used to run straight hydraulic fluid on trailers operating in the north that never warmed up. We finally used aircraft hydraulic fluid because it was hard on the batteries that ran the electric motors.

I prefer to keep it simple and problem free. Dollars worth of cardboard to cover the cooler if I notice the tranny start to shift hard in the brrrrrrrr cold.