Putting a temp sensor in a NV 4500

[azcummins]

since I'm gonna change my transmission fluid soon as directed by you guys, I was thinking of adding a temp gauge in the fill/check port in my NV 4500. Can this be done and is it even worth it?



NOTE : I have the 5spd not the automatic. I like to row my way around fort fun...

 

[Evan A. Beck]

I installed a temp sender in my NV5600. The best--and cheapest--way to do it, is to put a weld bung in one of the PTO covers. If you don't have a welder, I'm sure any welding shop would be glad to help you out.

 

[azcummins]

Bung....sounds like dung!

Evan-

Is a weld bung just like a bushing that you can weld into the metal and then thread in your sensor?



What kinda #s do you see out of your gauge?

 

[Evan A. Beck]

Yeah, you got the right idea about the bushing... ISSPRO sells them.



It takes a good hour or so to get to 100°F in 45°F ambient air temp... In the summer, it will go to 125-140°F.

 

[azcummins]

Not more parts...oh wait I got one!

Evan- Lucky I just happened to have one laying around after my Thermocouple for my EGT install today. I'll do it that way.



Let's see here... an hr @ 45 and it is 20 here... . will the gauge ever move?

 

[M Barnett]

I made my bung as I have a lathe and installed it as Beck says on the pto cover. Then I made the mistake of buying a gauge that starts at 140*. My five speed usualy doesn't register in the winter unless a long drive with hills. Summer time is about 140 to 180 with outside temps around 100.

M Barnett

 

[azcummins]

Wow--looks like the transmission doesn't get very hot @ all... think I'll save my dash space and $ for fuel press. then maybe a rear end gauge.

 

[Joseph Donnelly]

I replaced the 3/4" NPT fill plug with a hex head hollow brass plug that I drilled and tapped for 1/8 NPT. That way I hope to get the hottest oil, not the average temperature of a submerged sender. I have seen over 200 deg many times in the hot Vegas summer, especially towing. The temp went up another 30+ degrees when the fifth gear was cocked on the mainshaft.

 

[Steve Campbell]

Joseph, what are the telltale signs of the 5th gear being "cocked on the main shaft"?

 

[Bandit1]

could this same method of burning a hole in the pto cover be used on a 97 PSD with a 5sp?

 

[Joseph Donnelly]

The only sign of the gear being cocked is the increased trans temp, kuntil it spits off the nut and you lose 5th.