I put on a trans cooler two years ago and have seen no adverse problems at all. Been using the Scangauge II for the last 3 Months, and just finished a rugged Moab trip. The numbers show a definite bonus in keeping the fluid temps down. We were wheeling with AC--Sat radio--lumbar support and a frosty soda in the cup holder. Can't hardly beef about that.Am considering adding a transmission cooler on a 2002 Envoy, I-6, 4x4 I am going to buy. Will the trans cooler cause any notable problems with the AC condenser or radiator efficiency?