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Old 04-07-2011, 04:23 AM
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You could Bypass the Radiator. If you bypass the Rad you will need a X-Large Cooler tho'.
With the newer Trans warm up is important, the Trans temp switch & ECM wont allow Lockup untill a certain fluid temp is reached. Could be a problem in cool/cold weather.

This is from PATC's site: http://www.transmissioncenter.net/700r4.htm
Transmission Cooling:
""You must have a transmission cooler in your radiator regardless of what someone has told you for the transmission to last. Auxiliary coolers are just that, in addition to. Water cools 32 times better (faster) than air always, period. In the case of air vs. water, there is no contest - water is way better. The transmission fluid comes directly from the torque converter at a much higher temperature than the water in your radiator and is cooled to the water temperature fast. Then it goes to the auxiliary cooler to be cooled far below the water temperature. If you don't need a cooler in your radiator why does GM spend all that money doing so? If you wanted to cool a red hot piece of steel fast would you stick it in water or air, see the point. Your transmission will run cooler with a lock-up converter. This is more important with stall speeds of 2000 RPM or higher.""

Personally, I always use both Coolers. Trans to Rad to Aux & back to Trans.
Todd
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