I once raced an auto Chrysler Newport (don't ask) and used a Dodge Dart rad as an oil cooler by sealing the rad hose outlets, filling with water and using the stock line connections....very effective. Best tactic is to flush the trans completely (go to a trans shop for this...get them to use the Big Machine) then use synthetic trans fluid. Change the filter or gut it for a simple screen since a clogged filter isn't going to save the trans anyway. If you can fab a deeper pan, do so....many import slushboxes use a minimal fluid volume...if you can, rig a small tank or maybe use v. fat lines to the cooler, the extra volume will help. Check that the pickup stands off the pan bottom and is firmly attached...I've seen some slip down and suck air or choke off the pickup...if it's electronically controlled, remember overdrive and lockup converters....you don't want either cycling on and off, which it will if there's a decent straight....disable or lock out the OD at the selector lever...converter clutch can be as simple as cutting wires. GM mechanics used to do this on 700R4's to address customer complaints about "surge" as the converter locked. Seperating trns and engine cooling can also prevent a mystery engine overheating issue....jeez, I oughtta start a team....
Jim "Endo" Anderton
30 years of racing and still not Brambilla.....