06-20-2008, 06:47 PM
I have a new Autometer trans temp gauge with a temp sensor that has a 1/8 NPT threaded body. The probe is "grounded" through the threads. The probe extends about .500" beyond the threads. I think most are installed in the trans pan or after the cooler. My issue is the new Art Carr trans pan is cast aluminum and does not have adequate wall thickness to drill & tap a hole for the sensor except directly below the threaded pan dip stick tube location. I don't think this is the ideal location ... the probe would be close to the exhaust down pipe. So...I am considering 2 options...
1) Weld an aluminum bung to the cast pan and drill & tap a hole. Of course, I don't have the ability to weld aluminum?
2) Install it in the C4 pressure test location (believe it is a 1/8 NPT) on the C4 (drivers side up near the bell housing). I think the temperature measured at that location would be after the pump. I would not know how well the fluid was cooled but sure could measure the "cooking" temperature... Would the probe block/restrict a required flow passage? If someone could look at a stripped down C4 case to confirm this truly an option.
3) Any other options?
1) Weld an aluminum bung to the cast pan and drill & tap a hole. Of course, I don't have the ability to weld aluminum?
2) Install it in the C4 pressure test location (believe it is a 1/8 NPT) on the C4 (drivers side up near the bell housing). I think the temperature measured at that location would be after the pump. I would not know how well the fluid was cooled but sure could measure the "cooking" temperature... Would the probe block/restrict a required flow passage? If someone could look at a stripped down C4 case to confirm this truly an option.
3) Any other options?
'77 EB, 2.5" SL, 2"BL, Cummins 4bt, C4 w/Art Carr manual Valve Body, 35" BFG KM2s
http://www.youtube.com/watch?v=M_HqhiW38ik
http://www.youtube.com/watch?v=M_HqhiW38ik