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Username Post: Speedometer issue with 1964 Impala        (Topic#354175)
kingkreeton 
"5th Year" Silver Supporting Member
Posts: 1212
kingkreeton
Loc: Houston TX
Reg: 04-15-11
12-02-18 08:47 AM - Post#2753085    

Good Day all,

A month before my scheduled ankle surgery, my car blew a head gasket. I replaced the engine with a crate 350HO from Chevy Performance. I had a shop down the street do the install and they delivered it to my house but at that time, I had already had the surgery so I can't walk, or push the clutch in to drive my Impala.

My father came in town for Thanksgiving and he agreed to take me for a short cruise in the car to test drive it. It ran awesome but we noticed a slight clicking sound and noticed the speedometer was jumping around some at certain speeds. We also noticed the odometer was not spinning. I didn't have this issue prior to the engine replacement and wanted to get your opinion on the cause and how to go about fixing the issue.

The new engine is a more modern 350 with votec heads which required a new flexplate. New flexplate also required a new bellhousing, clutch and starter. I'm thinking maybe the speedometer cable got kinked somehow during the installation of those components but not sure.

What would cause the clicking sound in the instrument cluster and why would the odometer stop spinning? Could it be a problem with my instrument cluster as opposed to a damaged speedometer cable?

I appreciate everyone's input and hope your weekend is going well.



Shane
64 Impala SS:
Chevy Performance 350HO
4 Speed Muncie

Proud member of Big Blue Nation, University of Kentucky Basketball. "Go Big Blue"


Edited by kingkreeton on 12-02-18 09:14 AM. Reason for edit: No reason given.

 




69_BOWTIE 
Senior Member
Posts: 1009

Loc: WYOMING,USA
Reg: 02-27-02
12-02-18 09:26 AM - Post#2753095    
    In response to kingkreeton

I would remove and reinstall cable ends sounds like it not fully engauged .Usually you can just unscrew one end and spin it a tad and it will engauge in the gears

2001 Silverado 4X4
2005 FXDWGI
69 CHEVY Short Step
63 IMPALA 2/DR HRDTOP 327


 
DonSSDD 
Silver Supporting Member
Posts: 6944
DonSSDD
Loc: Nova Scotia, Canada
Reg: 08-21-01
12-02-18 01:14 PM - Post#2753114    
    In response to 69_BOWTIE

That’s good advice, but if that doesn’t work, it could be old grease in the cable or the speedometer.

63 Pontiac Parisienne Sport Coupe(CDN Chev mechanically (409, 4 speed),62 Bel Air SC (sold), 59 El Camino (sold), 62 Bel Air SC(sold), 63 SWC Vette (sold),
Member #2194


 
junky 
Valued Contributor
Posts: 2745

Loc: Northeast CT
Reg: 06-27-10
12-02-18 07:05 PM - Post#2753136    
    In response to kingkreeton

Clicking is usually caused by a broken strand of wire in the bundle that makes up the speedometer cable. You have to remove it from the cable sheath, and then wipe it through a cloth to find the broken cable wire. They are not repairable, so just buy another cable, and install it. Universal cables are available at the auto parts stores, and you cut it and put a new end onto it. Reinstall, and you should e good for another 50,000 miles. Once you get it working, check your speedometer for accurate reading with a GPS.

Never argue with an idiot. He'll drag you down to his level, then beat you with experience.


 
omarine 
Contributor
Posts: 181

Loc: San Diego
Reg: 06-29-15
12-03-18 06:43 AM - Post#2753160    
    In response to kingkreeton

same happened to my speedo - it usually occurs when flipping to a new digit for example 29,999 to 30,000.

In my case I got one rebuilt, that original grease in there hardens and must be broken free, cleaned and relubed.

drove with needle jumping around for a while in hopes it would un-stick itself.

found a good builder on ebay - I think I paid like $150 or so after sending him back mine.

61 Impala bubbletop, 283, 2bbl Rochester, generator, points and drum brakes- daily driver
'49 Harley Davidson FL - Panhead


 
kingkreeton 
"5th Year" Silver Supporting Member
Posts: 1212
kingkreeton
Loc: Houston TX
Reg: 04-15-11
12-03-18 09:36 AM - Post#2753186    
    In response to omarine

  • omarine Said:
same happened to my speedo - it usually occurs when flipping to a new digit for example 29,999 to 30,000.



Wow, good call. Mine is stuck there at 59,999. I'll see about making the speedo cable adjustments first. If not, does anyone know who rebuilds these things nowadays?

Thanks

Shane




Shane
64 Impala SS:
Chevy Performance 350HO
4 Speed Muncie

Proud member of Big Blue Nation, University of Kentucky Basketball. "Go Big Blue"


 
55 Shaker 
Member
Posts: 1465

Age: 69
Loc: north central IL.
Reg: 03-13-06
12-03-18 10:00 AM - Post#2753190    
    In response to kingkreeton

Shane, here's the one I used in Howell Mich. with no complaints. https://www.bobsspeedometer.com/1/120/index.asp


Brian

The older I get, the more dangerous, I am !!!!


 
kingkreeton 
"5th Year" Silver Supporting Member
Posts: 1212
kingkreeton
Loc: Houston TX
Reg: 04-15-11
12-03-18 11:03 AM - Post#2753198    
    In response to 55 Shaker

Thanks for everyone's responses. I hope to be healed up enough to climb underneath and see what is going on. I'm going to be replacing my dash harness soon so that may be a good time to send my cluster off for a refresh so I don't have to take things apart again.

Shane
64 Impala SS:
Chevy Performance 350HO
4 Speed Muncie

Proud member of Big Blue Nation, University of Kentucky Basketball. "Go Big Blue"


 
omarine 
Contributor
Posts: 181

Loc: San Diego
Reg: 06-29-15
12-03-18 11:20 AM - Post#2753200    
    In response to kingkreeton

Shane, with the 59,999 miles, my guess is the odometer gears are stuck.

I will look up my emails for the guy I used for rebuilt speedo.

good idea to replace wiring while already back there..

cheers
Oscar


61 Impala bubbletop, 283, 2bbl Rochester, generator, points and drum brakes- daily driver
'49 Harley Davidson FL - Panhead


 
Andy4639 
Frequent Contributor
Posts: 1212

Age: 58
Loc: Liberty, SC
Reg: 08-06-16
12-03-18 02:15 PM - Post#2753223    
    In response to omarine

Most of the time it's the little plastic piece that holds the speedo rollers in place. It's on the bottom of the mileage gear set.

I need to take mine a part and fix it as well.

I have fixed several in the 67-72 Chevy trucks over the years.




1956 Bel Air - LT-1/4l60
1964 SS Impala -350 crate/powerglide
1967 Ramp truck - 350/ 4 speed
1971 C 10 - 6.0 LS / 4l80e 4:10 gears 30 years owner
94 Elderado
2000 S-10
2008 LTZ Tahoe
2011 Treverse


 
kingkreeton 
"5th Year" Silver Supporting Member
Posts: 1212
kingkreeton
Loc: Houston TX
Reg: 04-15-11
12-03-18 02:40 PM - Post#2753230    
    In response to Andy4639

Sounds like a good opportunity to make a "How to" write up so you can show us how to do it. I would be afraid I couldn't get the cluster back together once I had it apart. I hope that it is something I can fix as I just got a $400 quote to send it off for repair/refresh.



Shane
64 Impala SS:
Chevy Performance 350HO
4 Speed Muncie

Proud member of Big Blue Nation, University of Kentucky Basketball. "Go Big Blue"


 
Fossil_Fuel 
"6th Year" Silver Supporting Member
Posts: 1042
Fossil_Fuel
Age: 59
Loc: Minnesota
Reg: 09-11-07
12-03-18 02:45 PM - Post#2753231    
    In response to Andy4639

Mine had same problem at 49,999. They are not that hard to fix. Pop out the little plug and lube it with some light oil. I flushed it with WD40 then drained and put in a little electric motor oil, then replaced the plug.
I bench tested before and after with electric drill and the difference is dramatic. It’s just the grease getting old and trying to turn the next digit. Makes the Speedo needle jumpy and no turning of the odometer.

Google it for a good article. See pics below:





Attachment: 582CEEC3-4F1B-4E00-8DAB-D4FA9F696635.png (814.32 KB) 29 View(s)
Attachment: BE79FBB0-9E27-47F4-9D3D-5DACE6FCB893.png (1.01 MB) 21 View(s)
Attachment: 17D3E66B-2D08-4C91-9D30-F4929F2441F3.png (516.18 KB) 20 View(s)

Craig
1964 Impala SS 327/300 since '76
1967 Impala SS 327 Triple Black Hardtop in the works
1967 Impala 327 Bench Seat 4-speed
http://craigaacars.shutterfly.com/pictures


Edited by Fossil_Fuel on 12-03-18 02:50 PM. Reason for edit: No reason given.

 
kingkreeton 
"5th Year" Silver Supporting Member
Posts: 1212
kingkreeton
Loc: Houston TX
Reg: 04-15-11
12-03-18 02:50 PM - Post#2753232    
    In response to Fossil_Fuel

  • Fossil_Fuel Said:
Mine had same problem at 49,999. They are not that hard to fix. Pop out the little plug and lube it with some light oil. I flushed it with WD40 then drained and put in a little electric motor oil, then replaced the plug.
I bench tested before and after with electric drill and the difference is dramatic. It’s just the grease getting old and trying to turn the next digit. Makes the Speedo needle jumpy and no turning of the odometer.



Which plug are you referring to? Where the speedometer screws into the instrument cluster?


Shane
64 Impala SS:
Chevy Performance 350HO
4 Speed Muncie

Proud member of Big Blue Nation, University of Kentucky Basketball. "Go Big Blue"


 
Fossil_Fuel 
"6th Year" Silver Supporting Member
Posts: 1042
Fossil_Fuel
Age: 59
Loc: Minnesota
Reg: 09-11-07
12-03-18 02:54 PM - Post#2753233    
    In response to kingkreeton

See the pictures I added.
Or google “55-72 Chevrolet speedometer Repair”
Ecklers posted a how to article many years ago with good pictures.

Craig
1964 Impala SS 327/300 since '76
1967 Impala SS 327 Triple Black Hardtop in the works
1967 Impala 327 Bench Seat 4-speed
http://craigaacars.shutterfly.com/pictures


 
kingkreeton 
"5th Year" Silver Supporting Member
Posts: 1212
kingkreeton
Loc: Houston TX
Reg: 04-15-11
12-03-18 03:22 PM - Post#2753236    
    In response to Fossil_Fuel

Awesome, thanks for that.

Shane
64 Impala SS:
Chevy Performance 350HO
4 Speed Muncie

Proud member of Big Blue Nation, University of Kentucky Basketball. "Go Big Blue"


 
65_Impala 
Very Senior Member
Posts: 4139

Reg: 12-29-02
12-10-18 11:19 AM - Post#2754069    
    In response to kingkreeton

My 65 did that. I had to take it apart until I got to the shaft holding all the number wheels. I then had to pry the washer on the end a little until the wheels were looser on the shaft. They were bound so tight it didn't matter how much cleaning or oil was applied. They simply couldn't spin free enough to turn multiple numbers at once. Once I did that it worked great, until I replaced the cluster with electronics that is.



 
gfm64 
Poster
Posts: 34

Reg: 09-06-16
12-10-18 03:32 PM - Post#2754099    
    In response to kingkreeton

I had an old car do this. I found out the cable had rust in it. It made the speedometer do the same as yours. I found a tool that fit on the end to pump grease into the cable. After that it worked like new. That was back in the 70s so I cannot remember what the tool was .



 




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