One wire lock-up, 4 spd automatic w overdrive into A-body.

While working with Treblig regarding the transmission adapting the transmission cooler lines to minimize the Mopar small fitting restriction, I found out this from the TCI Tech pages. (Mopar has the smallest fittings at the transmission and radiator 1/8" NPT -5/16" flare, but Chevy & Ford run the 1/4"NPT - 5/16 flare. They all use 5/16" lines though).

We were both trying to maximize the stock Mopar 1/8" NPT fittings by enlarging the internal hole in them to at least .220" to .230". Treblig got the job done by custom making and silver soldering his radiator fittings. It's a clean set-up.

I was going to have the internal, lower radiator transmission cooler replaced with a GM unit, but have since decided to follow Trebligs' lead, because after I contacted my trans builder Lonney at Extreme Automatics and ran all this by him; he said you actually want some restriction to slow the fluid in the cooler lines down enough to let the coolers take more heat out of the fluid. Only a small percentage of the fluid is being directed through the cooler lines at any given time, so the .220" fitting orifices are fine. He even went further and said the feed inside the actual pump is even smaller.

This makes it even easier and slightly less expensive when it comes to adapting the 200R4 to our Mopars.

Some guys would just bypass the radiator and go directly to an auxiliary tranny cooler, but it is important to warm the fluid up to operating temperature( and also take some heat out of the fluid when hot) before sending it to an auxiliary cooler.

The ideal transmission temperature for the fluid looks to be 175 degrees. I'm going to add a transmission temperature gauge at Treblig's suggestion.