Tachometer replacement thoughts

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Turbo4whl

Supporting Member
Supporting Member
Joined
Oct 30, 2019
Posts
3,155
Reaction score
7,323
Location
Downingtown, PA
First Name
Wayne
Truck Year
1974
Truck Model
Jimmy
Engine Size
350
As I recall those clocks were all dead before the 80s were over! Lol

When my Dad bought his 78 K20 is 80' with 25,000 miles the clock was already dead....
Those old clocks are very fixable if you want to take the time to fix it.

Typical clock movement with a spring. When the spring winds down, the contacts touch and give it another shot. Many times all you need to do is take your point file and clean off the contacts.
 

farm truck

Full Access Member
Joined
Apr 1, 2022
Posts
96
Reaction score
163
Location
Laguna Hills, CA
First Name
chris
Truck Year
1970
Truck Model
C2500
Engine Size
350
I did the in-dash tach addition and love it. Not the LMC one, but similar stock look. As you already know, it takes a circuit board & backing plate to make it work. I had a column mounted cheapo previously & prefer the one I have now. I also installed a vac gauge that is defective and a chrome bezel while I was at it.
Quoting myself here. Found pics of the install:

You must be registered for see images attach

You must be registered for see images attach
 

Grit dog

Full Access Member
Joined
May 18, 2020
Posts
7,089
Reaction score
12,465
Location
Auburn, Washington
First Name
Todd
Truck Year
1986, 1977
Truck Model
K20, C10
Engine Size
454, 350
Those old clocks are very fixable if you want to take the time to fix it.

Typical clock movement with a spring. When the spring winds down, the contacts touch and give it another shot. Many times all you need to do is take your point file and clean off the contacts.
I can’t wait to try that! I could have the only working squarebody clock!
Well except yours since you know the secret already…
 

Sgt Gus

Full Access Member
Joined
Aug 2, 2023
Posts
318
Reaction score
474
Location
Texas
First Name
Mark
Truck Year
87
Truck Model
R20 3/4 ton
Engine Size
454ci/7.4L
I can’t wait to try that! I could have the only working squarebody clock!
Well except yours since you know the secret already…
It will be the thing at the 1st square body rally. "Dude, does your clock work?"
 

Craig 85

Full Access Member
Joined
Jan 25, 2017
Posts
3,918
Reaction score
4,126
Location
Nashville, TN
First Name
Craig
Truck Year
1985
Truck Model
K30 SRW
Engine Size
454/TH-400/NP205
It will be the thing at the 1st square body rally. "Dude, does your clock work?"
Mine still works, runs a little slow though. I’ll have to look into cleaning it.
 

Latest posts

Forum statistics

Threads
44,414
Posts
956,970
Members
36,737
Latest member
Fjoel040
Top