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Old 10-31-2010, 04:45 AM   #1
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Transmission cooling lines flow

Looking down at my Radiator, which one is the to Rad and from Rad line on my
1990 4.2 YJ with the TF999 automatic? I'm installing a trans cooler.

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Old 10-31-2010, 09:37 PM   #2
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I figured out the the line pumping the tranny fluid into the rad is on the right side of the rad when facing the engine.

During the install, I noticed that my transmission lines are very close to my exhaust manifold. I did do the MPI upgrade, and I used a manifold from a 4.0, so having the transmission lines that close to the manifold can't be good, right? Well, hopefully the tranny cooler helps till I reroute the lines.

I bought the tranny cooler from NAPA, and it looks like it could be made by Hayden because the zip tie buttons say so. While I was doing the install, I decided to remove the AC condenser since my AC isn't working, and later I plan to remove the AC compressor. So my tranny cooler is mounted right in front of the radiator, and I figure that with the AC condenser removed, my radiator might get a bit more cool air.
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