C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

How the #%*! do you remove the speedo cable?

Thread Tools
 
Search this Thread
 
Old Jun 28, 2007 | 06:30 PM
  #1  
njcardave's Avatar
njcardave
Thread Starter
Instructor
15 Year Member
 
Joined: Apr 2006
Posts: 121
Likes: 1
Default How the #%*! do you remove the speedo cable?

I have to replace the speedometer cable on my 75 coupe. I tried to get to the back of the speedometer by lowering the steering coulumn and I had half of the dashboard apart and I ccould not get to the back of the speedometer to remove the cable. Can someone PLEASE give me step by step instructions on how to do this job? Thank you.
Reply
Old Jun 28, 2007 | 07:21 PM
  #2  
Jc3vette's Avatar
Jc3vette
Instructor
10 Year Member
 
Joined: May 2006
Posts: 221
Likes: 1
From: Albuquerque New Mexico
Default

Most likely you just need to press the tab on the back of the speedometer that holds the cable. See attachments

Name:  DSCN1878.JPG
Views: 2021
Size:  137.4 KB

Name:  DSCN1880.JPG
Views: 1298
Size:  69.5 KB
Reply
Old Jun 28, 2007 | 08:09 PM
  #3  
Paul Borowski's Avatar
Paul Borowski
Team Owner
Supporting Lifetime Gold
25 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Aug 2000
Posts: 21,453
Likes: 461
From: Massillon,Ohio USA
2020 C3 of the Year Finalist - Unmodified
Cruise-In VI Veteran
St. Jude Donor '08-'09-'10-'11-'12
Default

...just "push" the retaining "ring" towards the speedo housing with your thumb, cable pulls free.
Reply
Old Jun 28, 2007 | 08:55 PM
  #4  
VCuomo's Avatar
VCuomo
Burning Brakes
10 Year Member
 
Joined: Jul 2006
Posts: 1,047
Likes: 12
From: SoCal
Default

If I read your post correctly, it looks like you're saying you can't reach the retaining lock tab.

Trust me, I feel your pain, having been there and done that more than once!

It's a royal PITA, but it can be done - lay face up in the driver's side footwell and snake your arm up in there (you'll have a lot more room if you remove the driver's seat first). To get the cable out, use one hand to grasp and pull on the cable while you use your thumb to push the retaining lock tab away from the cable.

Good Luck!

Last edited by VCuomo; Jun 28, 2007 at 08:59 PM.
Reply
Old Jun 28, 2007 | 09:34 PM
  #5  
blctalon's Avatar
blctalon
Racer
 
Joined: Sep 2005
Posts: 453
Likes: 1
From: Austin TX
Default

In my 78, I was able to reach around it and feel the thing that needed to be pushed from sitting in the driver's seat and holding the unit. If you end up doing any crawling underneath while looking up, make sure you have on your safety shades to avoid 30 years worth of crumbs falling in your eyes.
Reply
Old Jun 28, 2007 | 09:43 PM
  #6  
1BAD80's Avatar
1BAD80
Instructor
15 Year Member
 
Joined: Dec 2004
Posts: 216
Likes: 1
From: Lapeer Michigan
Default

With the culster pulled out a little ways its not hard to get at.
Reply
Old Jun 28, 2007 | 09:57 PM
  #7  
Corvette ED's Avatar
Corvette ED
Le Mans Master
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Mar 2000
Posts: 9,127
Likes: 2,326
From: Pottsville, PA. USA Home Of America's Oldest Brewery Yuengling
Default

Also if you push the clip in have someone pull the cable where it comes outside the firewall. This makes it easier.
Reply
Old Jun 30, 2007 | 07:47 AM
  #8  
Laird1978's Avatar
Laird1978
Instructor
15 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Sep 2006
Posts: 159
Likes: 1
From: Blaine Minnesota
Default

Originally Posted by Corvette ED
Also if you push the clip in have someone pull the cable where it comes outside the firewall. This makes it easier.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-1

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-2

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-3

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-4

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-5

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-6

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-7

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-8

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-9

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
Old Jul 5, 2007 | 12:28 PM
  #9  
BiggDawg-2k3's Avatar
BiggDawg-2k3
Cruising
 
Joined: Jun 2007
Posts: 13
Likes: 0
From: Cincinnati Ohio
Default Same problem here

I am having the same problem. I can find the tab and push it in but the cable still does not release. Do I need to push in just on the tab on the bottom or do I need to do more? I cannot seem to feel any kind of tab on top of the cable but it is very hard to get your fingers up there.
Reply
Old Jul 5, 2007 | 01:12 PM
  #10  
supercalvin's Avatar
supercalvin
Racer
 
Joined: Aug 2005
Posts: 435
Likes: 2
From: Boise Idaho
Default

Just the one tab on the bottom.

I couldn't fit my hands under there so I used a large screwdriver to push in the tab and a large set of needle nose pliers to pull on the cable. You need to do both at the same time. Keep working at it. SOmetimes it pops of easy, sometimes it needs to be cussed at.

I found the best way to get at the cable is from underneath.
Reply
Old Jul 5, 2007 | 01:40 PM
  #11  
Meh's Avatar
Meh
Team Owner
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2006
Posts: 29,335
Likes: 51
From: Monterey, CA
Default

I just bit it off with my teeth and installed digital...
Reply
Old Jul 5, 2007 | 03:05 PM
  #12  
BiggDawg-2k3's Avatar
BiggDawg-2k3
Cruising
 
Joined: Jun 2007
Posts: 13
Likes: 0
From: Cincinnati Ohio
Default OK - now new problem

Originally Posted by supercalvin
Just the one tab on the bottom.

I couldn't fit my hands under there so I used a large screwdriver to push in the tab and a large set of needle nose pliers to pull on the cable. You need to do both at the same time. Keep working at it. SOmetimes it pops of easy, sometimes it needs to be cussed at.

I found the best way to get at the cable is from underneath.

OK - so I was finally able to get it off. The problem appears to have been a support brace of some sort that is right behind where the cable connects - maybe for the steering column? Has anyone else experienced this? As you can imagine I am now having problems getting the new one on. I hope there is some easy trick to this and I do not have to completely disassemble the dash and/or drop the steering column to get this on. Thanks for the help and quick responses.
Reply
Old Jul 5, 2007 | 03:41 PM
  #13  
TopGunn's Avatar
TopGunn
Drifting
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: May 2005
Posts: 1,629
Likes: 4
From: Somers CT
Default

All you have to do is line it up and push, the retaining tab you pushed to release it will snap on the shaft. You might need someone to gently push from the firewall side while you make sure it's lined up from under the dash.
Reply
Old Jul 5, 2007 | 05:13 PM
  #14  
lebvette's Avatar
lebvette
Le Mans Master
20 Year Member
St. Jude 10 Year Donor
 
Joined: Oct 2001
Posts: 6,798
Likes: 25
From: Pine Bluff Arkansas
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-‘19-'20-'21
Default

Good info here. I tried once when I was replacing my 85 with a 160. After a while I said F### this and took it to my mech.
Larry
Reply
Old Jul 5, 2007 | 11:37 PM
  #15  
supercalvin's Avatar
supercalvin
Racer
 
Joined: Aug 2005
Posts: 435
Likes: 2
From: Boise Idaho
Default

Originally Posted by BiggDawg-2k3
OK - so I was finally able to get it off. The problem appears to have been a support brace of some sort that is right behind where the cable connects - maybe for the steering column? Has anyone else experienced this? As you can imagine I am now having problems getting the new one on. I hope there is some easy trick to this and I do not have to completely disassemble the dash and/or drop the steering column to get this on. Thanks for the help and quick responses.
Getting it on should be easier as you just push it back into position. No need to press on the tab. I did have to fight with all the little bulb/signal wires wanting to get in the way. ie between the cable and the spedo.

I don't recall a brace in the way on my 77, but that doesn't mean it wasn't there. Sometimes getting that square headed wire cable into the square spedo hole can cause difficulties.
Reply
Old Jul 6, 2007 | 12:54 AM
  #16  
jdunne's Avatar
jdunne
Burning Brakes
 
Joined: Jul 2000
Posts: 963
Likes: 0
From: melbourne,Australia
Default

It is usually only the inner cable that breaks...instead of removing the complete cable why don't you try just feeding the inner cable through from the distributor end? hope this helps....john
Reply
Old Jul 6, 2007 | 02:27 AM
  #17  
Bob Onit's Avatar
Bob Onit
Melting Slicks
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Mar 2006
Posts: 3,342
Likes: 7
From: Connecticut
Default

Originally Posted by supercalvin
Getting it on should be easier as you just push it back into position.
You may have to rotate the inner cable a tiny bit to get it to line up, but the installation is fairly easy.
Reply

Get notified of new replies

To How the #%*! do you remove the speedo cable?

Old Jul 6, 2007 | 10:29 AM
  #18  
Mr.Gearhead's Avatar
Mr.Gearhead
Burning Brakes
10 Year Member
 
Joined: Jun 2000
Posts: 892
Likes: 0
From: GA
Default

Originally Posted by jdunne
It is usually only the inner cable that breaks...instead of removing the complete cable why don't you try just feeding the inner cable through from the distributor end? hope this helps....john
I agree. It is much easier to just disconnect it at the transmission side and pull the cable out. However, if the cable broke at the speedo side, which is usually the case... you will to get the small "squared" section out from behind the speedo too...
Reply
Old Jul 6, 2007 | 12:24 PM
  #19  
Jud Chapin's Avatar
Jud Chapin
Race Director
Supporting Lifetime
20 Year Member
St. Jude 15 Year Donor
Liked
Community Favorite
 
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
Default

Has anyone tried lubing the cable by forcing graphite with compressed air through the tranny end of the connection
Reply
Old Jul 6, 2007 | 07:26 PM
  #20  
Billysvette's Avatar
Billysvette
Melting Slicks
 
Joined: Jul 2006
Posts: 2,373
Likes: 6
From: Baltimore MD
Default

Ok guys i will tell you a little secret on how i did it,after you do it ,it will always be easy,but you may not want to do it.All you have to do is in your wiper valley look straight across from valley to tach and speedo,then take something to cut out the fiber glass,i used a dremel,it will be about 3x8 inch rectangle piece cut out,voila,there it is,super easy to get to.Then when you are done just silicone the piece back in.
Reply



All times are GMT -4. The time now is 07:56 PM.

story-0
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-1
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-2
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-3
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-4
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-5
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-6
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-7
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-8
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-9
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE