Outer Limits 4x4 Board

Hi Rodney it's Andrew here. (I work with Greg @ D&F racing in Carrum Downs)
I've got a question about cooling for GQ auto's. In your experience you say that cooling the auto trans fluid is one of the most important things to do. When fitting an auxialliary cooler at the front do you still use the auto coolers fitted in the radiator? If so. Doesn't the cooler on the hot side of the radiator acually heat up the oil and then defeat the purpose of cooling it in the 1st place?
When my GQ auto had to be rebuilt (before I knew you guys existed unfortunately) I had an external front mount trans cooler fitted but the auto trans place also recommended using both radiator trans coolers as well.
I guess I'm a bit confused with using the hot side of the radiator with an auto trans cooler.
Regards Andrew.
ps: Jack in the Nissan club is really happy with his auto you guys rebuilt earlier in the year and he's going to keep a close eye on the auto temps while towing his van to Qld now that you've fitted the temp guage for him.

Hi Andrew it's Rodney here. Yes we run both the factory fitted Radiator cooler that is inside the radiator and also fit a large external cross flow oil cooler up front if we get the chance. Through the radiator first then the external cooler. The reason for still using the internal cooler is that the water is hottest at the top of the tank and at it's coolest at the bottom so the water is a lot cooler when it passes over the heat exchanger that the transmission uses to cool it's self. In the case of a cross flow cooler you will find the heat exchanger in the cooler side.

I got a phone call from Jack 3-4 days ago when transmission temp went up, the engine lost most of it's power and he could not maintain road speed on the flat. Changed to petrol and everything was back to normal. Turns out that he had a bad batch of gas! I think he was running out personally hahaha. He was quite quick to tell me how much he liked the new transmission temp gauge as this was the first thing he noticed and why he rang. He had his foot down so far to keep it going that the lock-up couldn't come on by it's self. No lock-up and the transmissions temp started to rise way to high. Transmission dropped down to it's normal temp in only a few minutes once he changed to petrol.
Regards
Rodney