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Old 12-03-2010, 03:09 PM
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AOD Temp Gage Install

Where can I hook up an electric tranny temp gage to my '91 AOD? The gage has an 1/8" npt sending unit, but comes with the 3/8 & 1/2 adaptors. I know some will put it in the pan with a weld bushing, but I was hoping to avoid that. Putting it in a "T" in the line would work, but I thought it would be more accurate if it had a place to mount at the tranny.

Any other suggestions?

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Old 12-03-2010, 05:34 PM
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You can always go to an aluminum pan the drill and tap it for the 1/8" NPT. This is what I did originally but that pan had a seep leak.

I then found a sender for my VDO's that had straight threads (SAE) for the steel pan and am now using - that along with a double pole, double throw switch so I can read either water or transmission temps.

A tee in the cooler line - probably will work, but you will have to make up a well then plumb it in to the out line to your cooler.
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Old 12-04-2010, 07:43 AM
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Thanks for tips Ireland,

I do have a nice thick aluminum pan and unless someone can suggest a more direct approach - I'll drill and tap the pan.

Now, I'm really interested in the DPDT switch you used. Can you share the model number and maker? One could get pretty fancy with switching a single gage - Cabin temp, Outside Temp, Water, Oil, Tranny, Passenger Seat??? If a multiple pole/throw switch is actually available for that many circuits.

Ride On,

Noel
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Old 12-04-2010, 08:26 AM
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The switch is actually simple to wire, the gage input goes on the center lugs of the switch. Each sensor out put will wire individually too each side of the outer switch lugs. Functionally your have the gage in the middle and the sensor you wish to read at each end.
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Old 12-04-2010, 10:32 AM
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Quote:
Originally Posted by Sick467
Thanks for tips Ireland,

One could get pretty fancy with switching a single gage - Cabin temp, Outside Temp, Water, Oil, Tranny, Passenger Seat???

Ride On,

Noel
Be mindful of the gage range when combining readings, for instance there is at least a 150 degree difference between water & oil. Therefore you would want to dual read engine oil and the transmission because that gage would have the same scale . Such as inside and outside temps/

[/QUOTE] One could get pretty fancy with switching a single gage - Cabin temp, Outside Temp, Water, Oil, Tranny, Passenger Seat??? If a multiple pole/throw switch is actually available for that many circuits.Noel[/QUOTE]

That could be done with the use of a rotary switch . But it would require a digital gage to cover all the ranges ....... can you say computer control.

Then you could dump the rotary switch and incorporate a push button function for the propose of device scanning. Would also need to build in an alarm to detect the high or low parameters being exceeded to alert the driver of a pending failure ....... Sounds like a busy way to try and drive.

Not for me give me many analog gages to fill my dash.
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