1975 Dash Interchange
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Joined: Mar 2011
Posts: 66
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From: Valencia CA
1975 Dash Interchange
OK, so I finally got my first Corvette. When I get around to taking a pic, I'll post it and officially introduce myself to the forum. It's a 1975 and is in pretty nice shape.
So my first question about this car... I need to replace the lower left dash (the part with the speedo and tach). I need the whole thing... bezel, gauges, vents and all. So what years will interchange? I think I was told the tach drive changed in 1975 from a cable to electronic, but I'm not sure.
Thanks!
Rick
So my first question about this car... I need to replace the lower left dash (the part with the speedo and tach). I need the whole thing... bezel, gauges, vents and all. So what years will interchange? I think I was told the tach drive changed in 1975 from a cable to electronic, but I'm not sure.
Thanks!
Rick
TheCorvetteBen
Joined: Feb 2007
Posts: 4,987
Likes: 144
From: Van Alstyne, TX
OK, so I finally got my first Corvette. When I get around to taking a pic, I'll post it and officially introduce myself to the forum. It's a 1975 and is in pretty nice shape.
So my first question about this car... I need to replace the lower left dash (the part with the speedo and tach). I need the whole thing... bezel, gauges, vents and all. So what years will interchange? I think I was told the tach drive changed in 1975 from a cable to electronic, but I'm not sure.
Thanks!
Rick
So my first question about this car... I need to replace the lower left dash (the part with the speedo and tach). I need the whole thing... bezel, gauges, vents and all. So what years will interchange? I think I was told the tach drive changed in 1975 from a cable to electronic, but I'm not sure.
Thanks!
Rick
Race Director
Joined: Oct 2000
Posts: 12,596
Likes: 3,082
From: Shamong, NJ
The tach in that cluster is a 75-77 electric tach, not a 72 cable driven one. Also, 72 dash panels didn't have the small rectangular air vent, to the right of the column. The vent was only found on 74-77 dashes, and only in cars with air conditioning.
Because of the vent and tach installed in it, the dash appears to be either a 75-76 or 77 dash. There is a slight difference to the 77 dash, but I can't recall exactly what it is right now.
If the OP's 75 has air conditioning, this dash, as well as any other 74-76 dash panel will work for him. If he does not have air, then the left side panel from any non air, 71-76 Corvette will work. The 75-76 both use the same electronic tach, and while 77 also uses the same tach, the face is slightly different.
Thread Starter
Advanced
Joined: Mar 2011
Posts: 66
Likes: 0
From: Valencia CA
Thanks for the responses. My '75 has a/c so it looks like this dash/gauge combo might work. I'm not concerned if the face of the gauge is from a different year as long as the both work.
P/M sent to chstitans42.
Rick
P/M sent to chstitans42.
Rick
TheCorvetteBen
Joined: Feb 2007
Posts: 4,987
Likes: 144
From: Van Alstyne, TX
The left dash pictured here is not from a 72, as stated.
The tach in that cluster is a 75-77 electric tach, not a 72 cable driven one. Also, 72 dash panels didn't have the small rectangular air vent, to the right of the column. The vent was only found on 74-77 dashes, and only in cars with air conditioning.
Because of the vent and tach installed in it, the dash appears to be either a 75-76 or 77 dash. There is a slight difference to the 77 dash, but I can't recall exactly what it is right now.
If the OP's 75 has air conditioning, this dash, as well as any other 74-76 dash panel will work for him. If he does not have air, then the left side panel from any non air, 71-76 Corvette will work. The 75-76 both use the same electronic tach, and while 77 also uses the same tach, the face is slightly different.
The tach in that cluster is a 75-77 electric tach, not a 72 cable driven one. Also, 72 dash panels didn't have the small rectangular air vent, to the right of the column. The vent was only found on 74-77 dashes, and only in cars with air conditioning.
Because of the vent and tach installed in it, the dash appears to be either a 75-76 or 77 dash. There is a slight difference to the 77 dash, but I can't recall exactly what it is right now.
If the OP's 75 has air conditioning, this dash, as well as any other 74-76 dash panel will work for him. If he does not have air, then the left side panel from any non air, 71-76 Corvette will work. The 75-76 both use the same electronic tach, and while 77 also uses the same tach, the face is slightly different.
TheCorvetteBen
Joined: Feb 2007
Posts: 4,987
Likes: 144
From: Van Alstyne, TX
To answer your question, the 77 dash differs only in the far right side, where it meets the center guage bezel. Since it was converted from a pot metal housing to the plastic one, that edge is different. instead of resting along side, it actually covers that edge a little. take a look:
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