3 sending units, 1 3 pos. switch, 1 guage: would accuracy suffer?

[GM Guy]

I was chewing the fat with my old man about putting guages on one of his 6.5Ls and I said it would be nice if there was a pillar pod big enough for a diff temp (dana 80, bearing agles off from OEM, needs temp monitored) tranny temp, and boost & pyro.

He responded with the idea of using a three position toggle, three sending units, and one guage. that way you can monitor temperatures of Engine oil, transmission oil, and differential oil, just by flipping the switch.

The reason he said this should work is that on many combines from the 80s, they had one tachometer, with a switch that chose cylinder (or rotor) speed, engine speed, and ground mph (many said mph/ RPMs in 100s) and if they were fairly accurate on something as critical as RPMs, then there shouldnt be much from variance from truth when you use a switch the change oil temp sending units.

True, that the oil temp sensor type is different from an RPM sensor, but it should still work, IMHO.

Does anyone think it will work? Or is there a chance for too much variance?

 

[ak diesel driver]

I would think as long as all the sending units are the same it should be fine.

 

[GM Guy]

so you are saying buy a guage with sender, then buy two duplicate senders?

Thanks for the input!

 

[6.2 turbo]

That's a great idea,plus it will save money,just don't forget which toggle position is what,maybe mark them.

 

[GM Guy]

Im thinking just go down the line of the powertrain, up is engine, middle is transmission, down is rear end.

Do you guys think there is enough room in the pillar to mount a guage and a toggle? or does the toggle need to be in the dash?

 

[D2 Cat]

Before I mounted any gauges I would hook up the sending units for a test. See if it will do what you want, then finalize it.