Speedo cable extension
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Joined: Apr 2002
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From: dripping springs tx
Speedo cable extension
I removed my old 350 automatic trans. and installed a new 700 R4. I need to extend the speedo cable about 6". Does anyone know where I can get an extension to screw on the the existing cable and screw it on to the trans. gear? I have run out of contacts. The next option is to replace the complete cable with a longer one. 
It is going to be a bear if I have to pull the dash out one more time.
It is going to be a bear if I have to pull the dash out one more time.
Race Director
Joined: Sep 2004
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From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by Veet 66
I removed my old 350 automatic trans. and installed a new 700 R4. I need to extend the speedo cable about 6". Does anyone know where I can get an extension to screw on the the existing cable and screw it on to the trans. gear? I have run out of contacts. The next option is to replace the complete cable with a longer one. It is going to be a bear if I have to pull the dash out one more time.
It is going to be a bear if I have to pull the dash out one more time.why do you think you have to do this??? i didn't have this problem?
Race Director
Joined: Mar 2001
Posts: 11,322
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From: Living in the Hartland
This might work:
I am actually going to get one for my 5 speed install, temp shortage right now. Might look at some other vendors but this is from Mid American
http://www.madvet.com/shop?frame=4.140.1168
I am actually going to get one for my 5 speed install, temp shortage right now.
Might look at some other vendors but this is from Mid Americanhttp://www.madvet.com/shop?frame=4.140.1168
Race Director
Joined: Sep 2004
Posts: 11,874
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From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by Veet 66
I have to put a tight bend on the cable where it screws into the trans. At least a 85 degree bend and I am worrying about binding it up.
ok but i'm not sure how your set up will be any differeent then the rest of us who did this and this is the first post i 've seen where somebody has or thinks they will have a problem....
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From: dripping springs tx
Fevre. That would work for me but I wonder is the treads on both ends are the same as what is on our speedo cable and trans. gear.
Bobs77 vet. It maybe different because of year. Mine is a 66 compared to a 77. Maybe the c3 had longer speedo cables.
Bobs77 vet. It maybe different because of year. Mine is a 66 compared to a 77. Maybe the c3 had longer speedo cables.
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Originally Posted by Veet 66
Fevre. That would work for me but I wonder is the treads on both ends are the same as what is on our speedo cable and trans. gear.
Bobs77 vet. It maybe different because of year. Mine is a 66 compared to a 77. Maybe the c3 had longer speedo cables.
Bobs77 vet. It maybe different because of year. Mine is a 66 compared to a 77. Maybe the c3 had longer speedo cables.
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by Veet 66
It maybe different because of year. Mine is a 66 compared to a 77. Maybe the c3 had longer speedo cables.
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Thread Starter
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Joined: Apr 2002
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From: dripping springs tx
Fevre. I just got off the phone with MidAmerica. They said it will work on either the distributor or speedo cable. There are different ones for different years so make sure if you order one let them know what year it is for. Also they will have them in stock on March 25th. to ship out.
I ordered one.
Thanks for the lead.
I ordered one.
Thanks for the lead.
Thread Starter
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From: dripping springs tx
That is what I am doing now in my 66. Installed a TPI system with a 700R4 trans. My problem was I bought the VSS that screws into the trans. speedo gear and then the speedo cable screwed on to it. The shift rod would not clear the VSS so I put on a Vss that goes into the trans. where the speedo gear is. The VSS was used in the early 90's in police cars. The new VSS says not to use a 90 on the gear so the next best thing is to lengthen the speedo cable.
Le Mans Master
Joined: Aug 2003
Posts: 7,720
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From: Chattanooga TN
Gotcha. Go to good auto parts store and ask to see the speedo cable catalog. Look at what you have stock for your car and then find one longer. Many GM use the same 2 ends you need. 80s 4wd Truck and Suburban have a nice 90 sleeve crimped onto the outside of the cable. They are probably too long though.
Drifting
Joined: Mar 2003
Posts: 1,608
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From: Canberra AUSTRALIA
St. Jude Donor '05-'06
The guys who sell cruise control kits on the web have extensions for sale.
They have them so that they can put the mechanical to electronic speed sensors in line with the cable.
May be another source.
They have them so that they can put the mechanical to electronic speed sensors in line with the cable.
May be another source.
