Notices
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

speedometer needle bob

Thread Tools
 
Search this Thread
 
Old Feb 6, 2016 | 01:43 PM
  #1  
Rusty_S's Avatar
Rusty_S
Thread Starter
|
Lead Driver
15 Year Member
Photogenic
Photoriffic
Liked
Joined: Apr 2007
Posts: 5,958
Likes: 105
From: Houston
speedometer needle bob

Is this caused by the driven gear or cable?

Mine does it and sometimes doesnt do it but doesnt really do it at higher speeds.

I am leaning towards cable and qould just replace it but i have cruise which is a two piece speedometer cable and lmc only sells the non cruise cable.
 
Reply
Old Feb 6, 2016 | 01:52 PM
  #2  
FuzzFace2's Avatar
FuzzFace2
FTE Legend
10 Year Member
Photogenic
Community Builder
Liked
Joined: Nov 2015
Posts: 30,935
Likes: 4,124
From: Angier, NC
Club FTE Gold Member
I would say unlikely the gear most of the time it's the cable and a little lube from the top can fix it.


The other thing it can be is the speedo head it's self. The needle bearings get gunked up and cause that too.
Start with the cable lube
Dave ----
 
Reply
Old Feb 6, 2016 | 02:27 PM
  #3  
Rusty_S's Avatar
Rusty_S
Thread Starter
|
Lead Driver
15 Year Member
Photogenic
Photoriffic
Liked
Joined: Apr 2007
Posts: 5,958
Likes: 105
From: Houston
THanks for the reply, I think its the cable, I don't think its the speedo head itself as the needle bob is 10 mph at slow speeds goes to about 5 mph bob around 20 to 25 and back to 10 mph at 30 to 35 and 45 and up the bob is just very faint probably 1 to 2 mph.
Also it didn't do it this year but last winter when it was cold there was a loud grinding hum sound from the speedometer cable which has me thinking cable.


Will just pull it and put a large amount of that speedometer graphite oil I have.
 
Reply
Old Feb 7, 2016 | 12:18 PM
  #4  
WhatsAChevy?'s Avatar
WhatsAChevy?
Posting Guru
Joined: Jul 2015
Posts: 2,239
Likes: 5
From: Northeast Ohio USA
At higher speeds, the cable will not jump, or act erratic. At lower speeds, the gunk build up will cause it to intermittently "stall" causing what you are describing as "bob".
 
Reply
Old Feb 7, 2016 | 09:47 PM
  #5  
Rusty_S's Avatar
Rusty_S
Thread Starter
|
Lead Driver
15 Year Member
Photogenic
Photoriffic
Liked
Joined: Apr 2007
Posts: 5,958
Likes: 105
From: Houston
Yep that's why I was thinking of just replacing the cable. I did pull the cluster loose and used a whole tube of graphite oil speedometer lube on the upper cable it did fix most of the problem the bob goes away after 15 mph in warm months it wont do it at all. I am thinking about buying another tube and breaking the lower cable loose under the hood after the cruise control sensor and putting a tube of graphite oil there as well.


Or see if the cable will pull out of the housing where I can clean the cable off and then reinstall with a fresh tube of graphite oil.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
lavatan
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
12
Dec 29, 2011 12:53 PM
midsouth
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
1
Oct 8, 2011 12:33 PM
69WestCoastFord
1967 - 1972 F-100 & Larger F-Series Trucks
2
Jun 30, 2009 07:40 PM
72sportcustom3906.4l
1967 - 1972 F-100 & Larger F-Series Trucks
4
Jun 20, 2009 05:56 AM
fordranger68
1967 - 1972 F-100 & Larger F-Series Trucks
13
Feb 29, 2004 10:56 PM




All times are GMT -5. The time now is 08:38 PM.

story-0
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-1
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-2
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-3
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-4
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-5
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-6
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE
story-7
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-8
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE
story-9
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE