Additional Gauges
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Senior User
Joined: Feb 2010
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Additional Gauges
I am installing a transmission temperature gauge and was thinking of installing a coolant temperature gauge as the stock gauge does not really tell me anything. i would like to keep stock gauge functional and install the second on a pillar. Can I run the wire from the stock sender to both gauges? if not how would I plumb the two senders? thanks
Logistics Pro
Joined: Apr 2005
Posts: 4,221
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No, you can't run both gauges off the same sensor, but you can easily add another temp gauge without touching the factory one. Remove the square plug on the rear of the driver's side head for the aftermarket gauge's sensor:
Use a 9/16" 8-Point socket.
Of course, now that I showed that to you, you won't do it.
Use a 9/16" 8-Point socket.
Of course, now that I showed that to you, you won't do it.
Mountain Pass
Joined: Aug 2012
Posts: 114
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No, you can't run both gauges off the same sensor, but you can easily add another temp gauge without touching the factory one. Remove the square plug on the rear of the driver's side head for the aftermarket gauge's sensor:
Use a 9/16" 8-Point socket.
Of course, now that I showed that to you, you won't do it.
Use a 9/16" 8-Point socket.
Of course, now that I showed that to you, you won't do it.
Thread Starter
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Senior User
Joined: Feb 2010
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OK the sender at the far left of the photo is the overheat sender or the dash temperature gauge sender? If its overheat sensor is it only to trigger an idiot light if so I would light to install my temperature sender from here as it will be more accurate.
What would you expect the difference in temperature be from the back of the head location to the front of the head?
What would you expect the difference in temperature be from the back of the head location to the front of the head?
Elder User
Joined: Nov 2013
Posts: 627
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From: Manteca
True, I tested in both spots and there was little to no difference between the two locations.. this guy Chevy_Eater knows his ***** lol
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Thread Starter
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Senior User
Joined: Feb 2010
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OK than no need to make my life difficult, second temp sender goes in the spot as you recommended in rear of engine.
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Logistics Pro
Joined: Apr 2005
Posts: 4,221
Likes: 17
Sometimes. 
Seriously though, if any of the ports were out of the way of the circulating coolant there possibly could be a difference in temperature reading, but all the access ports in the heads are in major arteries of the cooling system and coolant circulates fast, it's not going to be able to lose any significant degree of heat from one part of the head to the other.
