Rusty wrote on 03-25-2008 08:45 PM
https://www.barthmobile.com/eve...061/m/8711055603/p/2

QUOTE:/ Mag-Hytec has replacement pans for transmissions with more capacity and baffles/fins for much better cooling. I put one on my 4L80E; on long uphills in summer, I've never had the tranny temp get above 205°F - usually runs around 170°F. One convenience is that it's drilled and tapped for a temp sender.

http://mag-hytec.com/products.htm

So what was your overall final impressions of their products??

Very pleased - I also have the differential cover, which adds about 1 qt. extra capacity; like the tranny pan, it's finned and designed for extra cooling. On my pusher, the Dana 80 is flipped, so I made a dipstick to check the level.

The tranny pan has a drain plug, a convenience. It does require a filter with extra depth, but it's readily available.

I can't remember the name of the transmission pan I had on my 1987 Chevy custom made van. It had a great design in the fact it had air tubes running through it, plus being finned.
That van was custom build by GM for a guy that retired from them. It had oversized alternator,
oversize radiator, oversize oil pan, extra heavy duty shocks. We put 187000 on it before we sold it and it is still running around town.

Wish I could remember the name of that tranny pan because it was a great design having air go through the pan.

A bit of thread drift, but Derale makes trans pans with air cooling tubes, but no fins.

See here: http://derale.com/products/tra...on-pans/cooling-pans

Seems to me that you want the oil to run at the temp of the coolant, like 185-210 degrees (higher temp is for the newer engines with the newest air pollution equipment) and regulate expansion and contraction of the metal components inside the engine. The oil is designed for this - Rusty?, and my diesel runs at 180 to 190 all the time. What is the benefit of washing the engine with lower temp fluids when the best performance is going to be when it is stable throughout the system?

You are correct for the engine oil, but the transmission fluid can get a lot hotter than that. With heavy load on a hill the fluid leaving the torque convertor can be well over 300 degrees. This is why the trans coolers become important.

180 is great if you can keep it there. Too cool is not good either, 160-180 is ideal.