Topic: 67 GT500 Assembly Line temperature sender switch ?

[Kyle Zammit]

Hi all,

I am looking for the correct Assembly Line temperature sender switch type of markings and color of insulator ?

The one that I removed from my car is marked AUTOLITE 260 with no date code. It looks like it had white insulator.

Here is a picture of my sender switch

[Bob Gaines]

Hi all,

I am looking for the correct Assembly Line temperature sender switch type of markings and color of insulator ?

The one that I removed from my car is marked AUTOLITE 260 with no date code. It looks like it had white insulator.

Here is a picture of my sender switch

Red insulator is typical. The white insulator is a more common replacement from what I have observed.

[Kyle Zammit]

Ok thank you Bob!

[RoyceP]

Hi all,

I am looking for the correct Assembly Line temperature sender switch type of markings and color of insulator ?

The one that I removed from my car is marked AUTOLITE 260 with no date code. It looks like it had white insulator.

Here is a picture of my sender switch

The originals are C6DZ 10884-B with the red rubber around the center post. The white rubber unit is for small blocks.

[Kyle Zammit]

The originals are C6DZ 10884-B with the red rubber around the center post. The white rubber unit is for small blocks.



Thanks Royce.


What is the correct number please?

[Bossbill]

More data:

https://www.concoursmustang.com/forum/index.php?topic=21427.0

[Bob Gaines]

The originals are C6DZ 10884-B with the red rubber around the center post. The white rubber unit is for small blocks.



Thanks Royce.


What is the correct number please?

The originals are C6DZ 10884-B with the red INSULATOR around the center post. I don't think there is another with  the same number that has a different color but the red was the assemblyline appearance from what i have seen.  FYI I have always seen the red insulator regardless of if big block or small block.  At least on all the Shelby's that I have observed which are my main field of interest. I would suspect it is the same for regular Mustang but hesitate to say for sure since those are not my field especially in light of the Mannel pictures. FYI the white insulator will work but makes the gauge read a little less. I think that I remember reading a TSB about using the white insulator sender to make the gauge read a little lower so that drivers are not alarmed by higher readings . I took that as trying to purposely fool a fussy driver.

[RoyceP]

Its the other way around Bob. The ones with the red rubber read lower for a given temperature reading.


The 1969 - 70 version continues to have the red rubber but the center post is #8 instead of #10 on the earlier version. Electrically the later version has the same thermister as the earlier ones. Apparently the original value thermisters are not being made any more. Anything you can buy reads too hot.

[jwc66k]

Attached is a copy of the appropriate page from Ford Car Parts (aka MPC), section 106 page 17, showing the temperature sender in question highlighted in red.

What is the correct number please?

The "correct" number would be what is commonly called the "engineering number" but that number is not readily available. The only current number is the "Ford service stock number" and 'locator code" which are shown above in reply number 3.
Jim

[Bob Gaines]

Its the other way around Bob. The ones with the red rubber read lower for a given temperature reading.


The 1969 - 70 version continues to have the red rubber but the center post is #8 instead of #10 on the earlier version. Electrically the later version has the same thermister as the earlier ones. Apparently the original value thermisters are not being made any more. Anything you can buy reads too hot.

  You may be right but I would like to see some documentation on the white reading higher on a V8 66-68 before being thoroughly convinced. It is not a big deal for me ether way because I don't mess with the white marked sender given all of the engines that are my main focus use the C6DZ-B with red insulator.

[RoyceP]

I have had NOS examples of each and tested them with my digital infra red Snap On heat measuring device. I submerged them in boiling water then measured temperature and resistance. The red ones are even marked with a higher temperature than the white version. Pretty sure I only have the red ones now. I was getting bad units brand new from various auto part stores and needed to find out the right information. Turns out there is nothing on the shelf anywhere that matches the originals.


The part that bothers me (some) is Ford installing temp senders that manipulate the gauge reading. That does not seem right.