As with any new project you always seem to run into stuff that you knew at one time but forgot exactly where you found it or put it. Well, I was installing a trans cooler in my 54 and needed to know which lines were in and out. I also needed to fabricate new lines so I also needed the fitting sizes. So after some quick searching on the web this is what I came up with.
| Transmission | Line Size | Cooler Out | Cooler Return |
|---|---|---|---|
| Powerglide | 1/8 NPT | Lower | Upper |
| Powerglide (Dedenbear) | 1/4 NPT | Lower | Upper |
| TH200C Metric, 200R4 | 1/4 NPT | Upper | Lower |
| TH250/350/350C | 1/8 NPT | Lower | Upper |
| TH400/700R4/4L60/4L60E/ 4L65E/4L80E(up to 97) |
1/4 NPT | Lower | Upper |
| 4L80E/4L85E(97 on) | 1/4 NPT | Front | Rear |
| TH425 | Outer - Farthest from the torque converter |
||
| 4T80E | Main case |
| Transmission | Line Size | Cooler Out | Cooler Return |
|---|---|---|---|
| C3/C4/C5/C6/E40D | 1/4 NPT | Front | Rear |
| AOD/FIOD | 1/4 NPT | Upper | Lower |
| AODE/4R70W | 1/4 NPT | Lower | Upper |
| ATX | Line nearest the pump | ||
| AXOD-E/A4XN/A4XS | Lower | ||
| E40D/4R100 | 1/4 NPT | Front | Rear |
| FMX | Rear |
| Transmission | Line Size | Cooler Out | Cooler Return |
|---|---|---|---|
| All Torqueflites | 1/8 NPT | Front | Rear |
| A500/518/618 | Rear | ||
| A404/413/470/670 | Upper |