Thought I would share how I implemented a dedicated auto transmission cooler on my S3.
This came about due to having obtained an alu heavy duty radiator from Silverton Radiators in Knysna - which did not come with the integrated transmission cooler, as per my request.
The original radiator in my car started leaking - again - and I’ve now learnt that any radiator older than 30 years ought to be replaced.
Alu radiator at the bottom , then A/C condenser, then transmission cooler on top. The alu radiator cost me $780 and the small (imported) transmission cooler $200.