Thread: Can I run w/o trans oil going into radiator???

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I checked the B&M directions and they do specify the return line for the sensor. Of course that would hopefully be the cooler of the two lines so that reading is optimistic.

Don Shillady
Retired SCientist/teen rodder

Originally Posted by Don Shillady

I checked the B&M directions and they do specify the return line for the sensor. OF course that would hopefully be the cooler of the two lines so that reading is optimistic.

Don Shillady
Retired SCientist/teen rodder

Don, like you I don't have a huge bunch of space "under there".. the connections for the radiator : trans cooler are especially tight. My first choice was 90' ell male thread X 3/8" compression brass fittings. Never a second thought! My 3/8" tubing was anodized blue aluminum tubing. I fabbed the tubings to bring the connections to the side of the radiator where I could add some hoses to provide a flex joint. The tubing is clamped to the frame with some of the rubber coated clamps and screwed into the frame.

I've never had a failure with any compression fittings. Until the state of Mass outlawed it back in the 80's we used them on brake lines!
I wouldn't worry about using them.

Originally Posted by Don Shillady

I checked the B&M directions and they do specify the return line for the sensor. OF course that would hopefully be the cooler of the two lines so that reading is optimistic.

Don Shillady
Retired SCientist/teen rodder

OH, almost forgot, I like the idea of putting the sensor in the return line. I think I'd like to know if the trans was getting a "hot" fluid "added in".... If the temp going into the trans was say 140' to 150', you could assume that the coolant from the engine was influencing the trans fluid cooler. If the Engine temp got excessive at say, 200' : 205' yet the trans cooler return stayed at 140' : 150' you'd know you're radiator system was working and a problem was within the motor and not the trans adding to a different problem.

Well, my 2 cents.. IMHO...