C1 & C2 Corvettes General C1 Corvette & C2 Corvette Discussion, Technical Info, Performance Upgrades, Project Builds, Restorations

replacing tach cable

Thread Tools
 
Search this Thread
 
Old May 7, 2026 | 07:20 PM
  #1  
newc2owner's Avatar
newc2owner
Thread Starter
Instructor
Conversation Starter
All Eyes On Me
Top Answer: 1
 
Joined: Feb 2026
Posts: 148
Likes: 19
From: Scottsdale AZ
Default replacing tach cable

My tach cable is definitely sticking so i bought a new one but i cant sem to get a good grip on the gauge side of the cable. I was really hoping to not have to pull the dash. Any tricks out there?
Reply
Old May 7, 2026 | 08:39 PM
  #2  
Nowhere Man's Avatar
Nowhere Man
Team Owner
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2003
Posts: 53,985
Likes: 9,353
From: Sitting in his Nowhere land Hanover Pa
2024 C2 of the Year Finalist - Unmodified
2015 C2 of Year Finalist
Default

drop the column, remove the screw in the fuse block, then replace one at a time the screws that hold the cluster in with 1/4-20 all thread and slide the cluster out a few inches.
Reply
Old May 7, 2026 | 09:56 PM
  #3  
newc2owner's Avatar
newc2owner
Thread Starter
Instructor
Conversation Starter
All Eyes On Me
Top Answer: 1
 
Joined: Feb 2026
Posts: 148
Likes: 19
From: Scottsdale AZ
Default

Originally Posted by Nowhere Man
drop the column, remove the screw in the fuse block, then replace one at a time the screws that hold the cluster in with 1/4-20 all thread and slide the cluster out a few inches.
What screw in the fuse block? the one by the high beams on the floor ?
Reply
Old May 8, 2026 | 12:52 AM
  #4  
anyChevy's Avatar
anyChevy
Drifting
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2011
Posts: 1,592
Likes: 384
From: Australia
Default

Just did my 67 AC car today and didn’t have to unbolt or remove anything but the AC ducting.
If your eyesight is decent and you’re flexible enough to lay on your back on the floorboard, you can reach and unscrew the cable with one hand.
Rubber gloves (for grip) or long needle nose pliers may help to loosen it first.
https://deluxespeedometer.com/
Helps to have a good quality cable also.



Last edited by anyChevy; May 8, 2026 at 04:14 AM.
Reply
Old May 8, 2026 | 08:53 AM
  #5  
R66's Avatar
R66
Le Mans Master
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Nov 2015
Posts: 7,389
Likes: 2,574
From: Really Central IL Illinois
Default

Disconnect the cable at the distributor first to allow the cable to move a bit.
Reply
Old May 8, 2026 | 09:38 AM
  #6  
Whatscooking's Avatar
Whatscooking
Pro
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Jul 2022
Posts: 575
Likes: 210
From: Southeastern Indiana
Default

Ya got more problems than a cable. Pretty short stretch.
Reply
Old May 8, 2026 | 10:56 AM
  #7  
newc2owner's Avatar
newc2owner
Thread Starter
Instructor
Conversation Starter
All Eyes On Me
Top Answer: 1
 
Joined: Feb 2026
Posts: 148
Likes: 19
From: Scottsdale AZ
Default

Originally Posted by anyChevy
Just did my 67 AC car today and didn’t have to unbolt or remove anything but the AC ducting.
If your eyesight is decent and you’re flexible enough to lay on your back on the floorboard, you can reach and unscrew the cable with one hand.
Rubber gloves (for grip) or long needle nose pliers may help to loosen it first.
https://deluxespeedometer.com/
Helps to have a good quality cable also.
Yea thats where I got my new one from along with the speedo one that I replaced when I did my trans. I can touch the cable end but cant seem to get enough oomph on it to break it free. Maybe just need a fresh attempt on it today
Reply
Old May 9, 2026 | 12:08 AM
  #8  
silver837's Avatar
silver837
Le Mans Master
Supporting Gold
Veteran: Army
Liked
Loved
Community Favorite
 
Joined: Mar 2017
Posts: 5,099
Likes: 1,598
From: Nor- Cal
Default

You might try a pair of slender chanel locks .
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

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

 Joe Kucinski
story-1

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

 Verdad Gallardo
story-2

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

 Joe Kucinski
story-3

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

 Verdad Gallardo
story-4

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-5

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

 Michael S. Palmer
story-6

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

 Joe Kucinski
story-7

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-8

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
story-9

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
Old May 9, 2026 | 12:10 AM
  #9  
newc2owner's Avatar
newc2owner
Thread Starter
Instructor
Conversation Starter
All Eyes On Me
Top Answer: 1
 
Joined: Feb 2026
Posts: 148
Likes: 19
From: Scottsdale AZ
Default

Originally Posted by silver837
You might try a pair of slender chanel locks .
On my setup it seems like the Zbar is in the way from below but maybe a small pair and reach up and over from above? I was gonna see if I could have a friend try and turn the cable itself from the engine bay while i try on the connection behind the gauge.
Reply
Old May 9, 2026 | 01:29 AM
  #10  
anyChevy's Avatar
anyChevy
Drifting
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2011
Posts: 1,592
Likes: 384
From: Australia
Default

Originally Posted by newc2owner
I was gonna see if I could have a friend try and turn the cable itself from the engine bay while i try on the connection behind the gauge.
Yeah that might work, good luck.
once it’s out, you’ll find installing the new one is a lot easier.
Reply
Old May 9, 2026 | 02:23 PM
  #11  
BAmacker's Avatar
BAmacker
Pro
25 Year Member
Conversation Starter
All Eyes On Me
Top Answer: 1
 
Joined: Feb 1999
Posts: 676
Likes: 112
From: Strongsville, Ohio
Default

I just did it on my '67 A/C car, it was not a big deal. Unhook the battery cable. If it's AC, remove the lower air duct on the driver's side. Using a super long needlenose pliers, use them vertically just behind the cig lighter and get on the cable ferrule nut. I'm arthritic so I use a big mirror to look at what I'm doing. Break it loose with the pliers and turn it until you're tired of turning it (since you can only turn it a few degrees each grab). Regular cheap extra long needle nose works, but even better if you have the type with the circle tips. With your left arm reach up around the backside of the cluster and you can get on the ferrule nut and spin it off. Long arms helps here but even with an AC car there was not much in the way. Remove cable and grommet from the engine side. Feed the new cable from the engine side and connect it to the tach first.

On the engine side, pull the dist shielding and the rear intake bolt that holds the plug wire loom and you can get at it easily from there. Order a new firewall grommet as yours is likely hard as a rock and will need to be replaced. Use a seal puller to install the grommet- pull on the puller using the curved tip to get the grommet into place once the cable is installed. On my '67 the grommet is a two-holer, the speedo cable also runs through it.

No cluster removal, column stays, no seat removal or anything. Flat rate is probably .6 or something if you're young and fast. Speedo guy says all mid years take the same cable so install should be similar or exact.
Using the seal puller to install the rubber grommet. Pull on the puller to work the boot into place.
Using the seal puller to install the rubber grommet. Pull on the puller to work the boot into place.
Seal puller for installing the grommet.
Seal puller for installing the grommet.
New and old cables.
New and old cables.
Reply
Old May 9, 2026 | 11:59 PM
  #12  
newc2owner's Avatar
newc2owner
Thread Starter
Instructor
Conversation Starter
All Eyes On Me
Top Answer: 1
 
Joined: Feb 2026
Posts: 148
Likes: 19
From: Scottsdale AZ
Default

got it. Just needed a fresh attempt and some more elbow grease. tach is perfect now.
Reply
Old May 10, 2026 | 12:48 AM
  #13  
anyChevy's Avatar
anyChevy
Drifting
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2011
Posts: 1,592
Likes: 384
From: Australia
Default

Originally Posted by newc2owner
got it. Just needed a fresh attempt and some more elbow grease. tach is perfect now.
Nice cables aren’t they ? I will never buy another cheap repro cable again, glad you got it done

Last edited by anyChevy; May 10, 2026 at 04:40 AM.
Reply
Old Today | 11:23 AM
  #14  
Jam421's Avatar
Jam421
Racer
10 Year Member
All Eyes On Me
Photogenic
Top Answer: 1
 
Joined: Mar 2015
Posts: 465
Likes: 155
Default

Was just on the website. Can I ask the part # of the mid year speedo cable you guys bought ?
Reply
Old Today | 11:46 AM
  #15  
newc2owner's Avatar
newc2owner
Thread Starter
Instructor
Conversation Starter
All Eyes On Me
Top Answer: 1
 
Joined: Feb 2026
Posts: 148
Likes: 19
From: Scottsdale AZ
Default

Originally Posted by Jam421
Was just on the website. Can I ask the part # of the mid year speedo cable you guys bought ?
I just called delux speedometer and told them what I needed and they hooked me up.
Reply

Get notified of new replies

To replacing tach cable





All times are GMT -4. The time now is 01:38 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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
story-7
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-8
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-9
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE