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Lngbeard's avatar
Lngbeard
Explorer
Dec 11, 2013

Trans cooler installation.

Hi all,
I wanted to be proactive to see if I could keep my automatic tranny alive for the long haul. I have a 27 ft Chateau sport with the 4R100 trans. I am the second owner and decided to bite the bullet and go with synthetic transmission fluid. I also installed a electric fan stacked plate cooler in a non-typical location. Here's how it went, The lay out:

I then used a hole saw for the corners. I anguished long and hard before cutting into my MH.

Finished the hole with a jigsaw where I could. Sealed the edges with Eternabond.

Here's the cooler from the inside. Lots of room. Protected from debris and gets unimpeded airflow.

And a perforated metal screen installed.

Finally a gauge to keep a eye on temps.

Have not exceeded 170 yet so The fan has not kicked on as far as I know.Hope this helps if anyone is looking to add a cooler.
  • path1 wrote:
    How hot was it running before you added fan?


    I think it was usually around 175-185. With a toad on a long pull (Vantage) on a hot day it may have got up around 195.
  • I'd hope you won't be running below what the normal operating temperature should be.