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Transmission Cooler Installation Tips for a 1994 Mercury Grand Marquis LS  

Updated 05/04/2012 | Published 05/02/2012



Question:

Hello, I am looking to install a trans. cooler on my 94 Grand Marquis LS. Looks like D13503 is a pretty heavy duty transmission cooler. 1 - In your opinion should I go with this cooler. If no, which cooler should I use for this vehicle. 2 - Are there any tips / instructions for installing on this vehicle specific? Thank you very much for you help.

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Expert Reply:

The Derale Series 8000 Plate-Fin Transmission Cooler Kit, # D13503, would be a great choice for your 1994 Mercury Grand Marquis, as long as there is room in front of the radiator and ac condenser for the cooler to mount. Measure to be sure before purchasing, but most likely you will have plenty of room.

The best tip I can give is to do some research on your vehicle. Check the radiator fittings and see if there are NPT (national pipe thread) fittings or Inverted flare fittings. Your vehicle most likely has a 351ci engine and there are two possibilities for fittings, NPT Adapter Fittings, # D13014, or inverted flare fittings, # D13024. You can match the fitting on your vehicle to the photo I attached to determine which is correct for your Marquis.

If you do not have either of these fittings the next best solution is to cut a steel transmission return line and install compression fittings on each cut end. The most common size for transmission lines is 3/8 inch but you should measure the outside diameter of the return line to be sure. I added links to each of the 3 sizes of compression fittings that we carry.

Once you have the adapter fittings or compression fittings installed, the rest of the installation is pretty straight forward. We have a transmission cooler install video that should help, in this video our installer chose to use compression fittings to attach the hoses from the transmission cooler to the vehicle transmission return line.

We have a couple of articles that have information that may be helpful also, see link.

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Bob G
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