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Username Post: gauge cluster swapping        (Topic#363357)
51 AD 3100 
Poster
Posts: 74

Age: 53
Loc: Grant, AL
Reg: 08-30-20
11-21-20 02:55 AM - Post#2808210    

i have a 1951 chevy 3100 im resto-modding. i am wanting the gmc faced (sort of) gauge and speedo faces and needing to make it work with 12v and for a sbc v8. So far i've acquired a (52?)gmc gauge cluster so the oil pressure reads the correct high value of 60 lbs. im a little uneducated as to the diffrence in the "battery" gauge. the chevy reads D-0-C and the face is labeled as just "battery" the gmc counterpart reads 50-0-50 and is labeled "amperes" anyone know what particular reason for the difference ? also the guy i bought it from cut the tiny tube on the pressure gauge instead of carefully disassembling the gauge from the dash and coiling up the tube like i did with mine. I havent gotten into the rebuilding of this ,but i do see these tubes can be bought new . are they air filled or some sort of liquid filled?
one other thing. as i stated , mine is an original 1951 ,BUT my speedometer is a 90 mph. As i'm reading though 90mph didnt start until 1952, 1951 should have still had 80mph speedos. I do know mine was built late in the model production year(March). Did i just get a model year changeover shelf part speedo? I'm refacing it to 100 mph anyway and the gizmo that attaches to the trans/cable to correct the ratio.


Life's more fun, in a '51


 


wagonman100 
Site Ambassador
Posts: 14813

Loc: Baltimore, MD
Reg: 11-27-04
11-21-20 10:33 AM - Post#2808251    
    In response to 51 AD 3100

The only difference in the amp gauge is the labeling. One is just discharging-0-charging and the other is telling you how many amps are being charged or discharged. The oil pressure gauge had oil going directly to the gauge from the engine. And my guess on the speedo being a 90 mph one is like you said. They knew the changeover was coming and had the new ones in stock and ran out of the 80 mph ones.

Jay
Friends don’t let friends drive Fords.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier


 
51 AD 3100 
Poster
Posts: 74

Age: 53
Loc: Grant, AL
Reg: 08-30-20
11-22-20 04:26 AM - Post#2808310    
    In response to wagonman100

i must have forgot ...the gmc temp gauge , the guy cut the wire short. is it junk or can i somehow put a new length of wire on it and use it. i still have the one from my 51 , still has the wire and probe. temp is temp , right?

Life's more fun, in a '51


 
wagonman100 
Site Ambassador
Posts: 14813

Loc: Baltimore, MD
Reg: 11-27-04
11-22-20 11:52 AM - Post#2808338    
    In response to 51 AD 3100

By wire do you mean a capillary tube? If it’s a mechanical gauge then you can use it. Even with an electric gauge, as long as you have the correct sending unit it will work fine.

Jay
Friends don’t let friends drive Fords.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier


 
51 AD 3100 
Poster
Posts: 74

Age: 53
Loc: Grant, AL
Reg: 08-30-20
11-23-20 02:58 AM - Post#2808381    
    In response to wagonman100

it looks mechanical . it could have a capillary tube. its pretty small ,so i cant tell . I went ahead and took a propane torch to the one that was cut and got the wire/tube out. took some heat to break the 70 yr+ solder out. just to see if it was possible. I went ahead and swapped the temp gauge from the old one i had that is intact with the probe over to the gmc cluster. the new units are like $60 if i have to get one. I just need to buy the reface kit and a couple new bezels and seals now.


Life's more fun, in a '51


 
wagonman100 
Site Ambassador
Posts: 14813

Loc: Baltimore, MD
Reg: 11-27-04
11-24-20 08:47 PM - Post#2808556    
    In response to 51 AD 3100

Sounds like a plan.

Jay
Friends don’t let friends drive Fords.

1999 Silverado Z71 4X4 extra-cab short bed
1983 Malibu Fauxmad - tubbed
1978 El Camino Kustomized
1972 Monte Carlo
1957 210 handyman wagon
1957 Nomad sport wagon
1957 Cameo Carrier


 


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