Join Date: Aug 1998
Location: Winnetka (aka L.A.), Ca.
Yes, the sending unit HAS to match the gauge unit!
If you look at the autometer catalog, I think that the transmission gauge that they sell goes to something like 250. Just order the engine temp gauge that goes to the same range.
One word of caution! I ordered autometer's phantom gauges and the extra sending unit through PAW (we had to call autometer in order to get everything straight, we thought) about 3 years ago. At around that time, they changed the sending units that they were using. It ended up that I got the wrong "extra" sending unit. When I found out about the problem and contacted them, they promptly sent me out the correct one without any problems, questions, or cost. If you look at the color of the insulation on the sending units, they should match! If it doesn't, it may be one of the older sending units that was sitting on a shelf.
Technical Reference Section