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Thread: XJ Transmission Oil Coolers
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Old 31-12-2009
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Quote:
Originally Posted by ChrisXJ View Post
I am going to install the Craig Davis P/N 678 cooler and a VDO gauge to the XJ AW4 Trans. I have done the search and I am now totally confused with all the opinions on how to install the cooler. Can someone please give me the best way to install the cooler. Some threads say run the Radiator trans cooler first and some say run only the new cooler. Others even say run the OEM cooler and the new Cooler. PLEASE HELP


I installed the Davies Craig #678 cooler in this configuration because...
  • The plumbing was easier
  • I wanted faster warm up times for the transmission oil (reduce cold operation wear)
  • The oil cooler assists the radiator via the transmission heat exchanger located in the radiator "hot" tank
  • The coolest possible oil was in the return line to the transmission


More details can be found in the thread titled Oil Coolers ... XJ nescessities ???