trans temp?

[pistolpete837]

how hot should my tranny run on my 04? unloaded and pulling 12-16k?

[Shep1824]

Once my truck warms up I run about 150-160 degrees. I am not sure about when towing heavy loads yet.

[vitalidle]

Generally its 60-80 degrees over outside ambient temps unloaded. Loaded depends but you want it to be 200 or under. The less heat the longer life of the trans

[dhanna6powerstroke]

I've had 13k behind mine and never got over 175 towing on level 4 with the 6 Gun.

[npccpartsman]

Contrary to what the aftermarket vendors will tell you and popular belief, the torqshift with Mercon SP is fine up to 230*. This is according to Mark Kovalesky who was a Ford transmission engineer from 1988 until 2007 and worked on the 5R110 extensively.

[vitalidle]

True it might be okay to 230, but running it to the max will shorten the life of a trans. The best advise I can give ya pistolpete is heat is always bad for a trans the less you can generate with synthetic fluids, coolers, and trans tuning for less slippage the longer the trans will last.

[bismic]

The light comes on at 230 degrees.

215 degrees is probably a comfortable maximum from what I have been told.

[pistolpete837]

thanks for the info. with spring coming around both of my truck will have to work alittle harder than they have over the winter.