Any reason I can't use a stock water temp gauge for a trans temp gauge? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chewychevy67 · 08-26-2018, 10:11 PM

Can I use a factory water gauge wired the same way as the water gauge but put a oil sending unit in the transmission and use it to gauge oil temperature? I would have to get a sending unit for oil and not water temp I suppose. What should a th400 run for temp? Is this gauge going to be in the correct temp range for the tranny? Any insight on what sending unit that would be the correct ohms would be appreciated. The gauge is from a square body truck. Thanks in advance.

bill3rail · 08-26-2018, 11:26 PM

You asked the question I was in here to ask...What temp does the tranny run? Do some tranny research to find that information and you will answer it yourself.

Bill

chewychevy67 · 08-26-2018, 11:36 PM

Ok Maby I'm better to buy this and add a truck gauge face to it or have one made tat appears factory. Ive read 175 f to 225 f at normal operation. This way I can get to higher temperatures and it will still appear factory looking.https://m.ebay.com/itm/1981-1982-COR...UAAOSwsGdaoeUc

weq92f · 08-26-2018, 11:48 PM

This pretty much jives with my limited experience as well. Drove a 2010 Tahoe for several years. It had tranny temp display in the dash if you knew how to find it! Despite high ambient temps and high speeds, the indicated never climbed above 195 that I observed.

Quote:

Originally Posted by chewychevy67

... Ive read 175 f to 225 f at normal operation...

**68bowtie** · 08-27-2018, 01:35 AM

I have thought it would be cool to do this in the blank slot on the 7-hole cluster. If anyone works it out I would sure love to hear some details!

Red71gmc · 08-27-2018, 08:28 AM

Good idea. I'm staying posted on this one.

chewychevy67 · 08-27-2018, 09:04 AM

Quote:

Originally Posted by 68bowtie

I have thought it would be cool to do this in the blank slot on the 7-hole cluster. If anyone works it out I would sure love to hear some details!

That's what I was thinking. Right now I have a vacuum gauge. Not sure how many times I've looked at it and wished a more useful gauge was there. I have a portable one for diagnostic work if I need.

philB · 08-27-2018, 12:21 PM

I used same type temp. sender for both and used a toggle switch to send to either sender, worked for me.

chewychevy67 · 08-27-2018, 02:33 PM

Wow that's a good idea too

chewychevy67 · 08-27-2018, 11:11 PM

Quote:

Originally Posted by philB

I used same type temp. sender for both and used a toggle switch to send to either sender, worked for me.

Did you use a sending unit from the engine in the transmission? If not what did you use and where did you locate the sending unit in the transmission?

08-26-2018, 10:11 PM	#1
chewychevy67 Registered User Join Date: Jan 2010 Location: Here Posts: 5,421	Any reason I can't use a stock water temp gauge for a trans temp gauge? Can I use a factory water gauge wired the same way as the water gauge but put a oil sending unit in the transmission and use it to gauge oil temperature? I would have to get a sending unit for oil and not water temp I suppose. What should a th400 run for temp? Is this gauge going to be in the correct temp range for the tranny? Any insight on what sending unit that would be the correct ohms would be appreciated. The gauge is from a square body truck. Thanks in advance. Attached Images Last edited by chewychevy67; 08-26-2018 at 10:32 PM.

08-26-2018, 11:26 PM	#2
bill3rail Registered User Join Date: Jul 2013 Location: LI, NY 11801 Posts: 1,140	Re: Any reason I can't use a stock water temp gauge for a trans temp gauge? You asked the question I was in here to ask...What temp does the tranny run? Do some tranny research to find that information and you will answer it yourself. Bill __________________ 1970 C10 8' Fleetside, L6 250, 3 on the Tree. The most basic of pickup trucks!

08-26-2018, 11:36 PM	#3
chewychevy67 Registered User Join Date: Jan 2010 Location: Here Posts: 5,421	Re: Any reason I can't use a stock water temp gauge for a trans temp gauge? Ok Maby I'm better to buy this and add a truck gauge face to it or have one made tat appears factory. Ive read 175 f to 225 f at normal operation. This way I can get to higher temperatures and it will still appear factory looking.https://m.ebay.com/itm/1981-1982-COR...UAAOSwsGdaoeUc Attached Images

08-27-2018, 01:35 AM	#5
68bowtie Senior Member Join Date: Jan 2007 Location: Turlock, CA Posts: 8,412	Re: Any reason I can't use a stock water temp gauge for a trans temp gauge? I have thought it would be cool to do this in the blank slot on the 7-hole cluster. If anyone works it out I would sure love to hear some details! __________________ I live in California, but identify as a Texan "If a job's worth doing, it's worth doing well" Project "Little Sister" (70 c10 blue original paint refresh) Project "C10 Fever" (68 factory black 396 swb) Project "Blue Bomb" (70 c30 blue original paint refresh) Project "Vitamin C" (71 c10 orange original paint refresh)

08-27-2018, 08:28 AM	#6
Red71gmc Registered User Join Date: Jan 2017 Location: Brookston, In Posts: 482	Re: Any reason I can't use a stock water temp gauge for a trans temp gauge? Good idea. I'm staying posted on this one.

08-27-2018, 12:21 PM	#8
philB Registered User Join Date: Oct 2012 Location: new orleans, la. Posts: 217	Re: Any reason I can't use a stock water temp gauge for a trans temp gauge? I used same type temp. sender for both and used a toggle switch to send to either sender, worked for me.

08-27-2018, 02:33 PM	#9
chewychevy67 Registered User Join Date: Jan 2010 Location: Here Posts: 5,421	Re: Any reason I can't use a stock water temp gauge for a trans temp gauge? Wow that's a good idea too



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