![]() |
![]() |
#1 |
Cultural Infidel
![]() Join Date: Jan 2007
Location: Clearwater, FL
Posts: 668
|
Speedometer question
My speedometer is off by 33%, this I am sure of. My question is, is the mileage reading also off by 33%? Or is it separate gearing?
-Mark
__________________
posted via La-Z-Boy -Mark 1972 C-10 Fleetside 350/TH350 PS PB A/C Cab Sadly....Sold ![]() 1968 Short Fleet 350/TH400 PS PB Delivered by Fine69 ![]() ![]() It may be that your whole purpose in life is simply to serve as a warning to others. A man is not complete until he is married -- then he is finished. |
![]() |
![]() |
![]() |
#2 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
|
Re: Speedometer question
theyre driven and off or on by the same amt
__________________
71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
![]() |
![]() |
![]() |
#3 |
Always on the hunt...
![]() Join Date: Sep 2006
Location: Portland, OR.
Posts: 5,604
|
Re: Speedometer question
|
![]() |
![]() |
![]() |
#4 |
Cultural Infidel
![]() Join Date: Jan 2007
Location: Clearwater, FL
Posts: 668
|
Re: Speedometer question
Thanks for the replies.
That's what I thought, but checking the miles against interstate mile markers, something wasn't adding up, the difference was less than 10%, and that was over several miles. I have checked the speedo with 2 different radar guns, (it's good to have local cops as friends), and it is definitely off by33% 30 MPH on the gauge, clocks at 40 MPH on the gun. 45 MPH clocks at 60 MPH. No big deal, as long as I know how fast I'm going.
__________________
posted via La-Z-Boy -Mark 1972 C-10 Fleetside 350/TH350 PS PB A/C Cab Sadly....Sold ![]() 1968 Short Fleet 350/TH400 PS PB Delivered by Fine69 ![]() ![]() It may be that your whole purpose in life is simply to serve as a warning to others. A man is not complete until he is married -- then he is finished. |
![]() |
![]() |
![]() |
#5 |
Throbbing Member
![]() Join Date: Jul 2006
Location: McDonough, GA
Posts: 350
|
Re: Speedometer question
All you have to do is change the gear in the tranny and you can correct it. I believe those little plastic gears are like $15.
|
![]() |
![]() |
![]() |
#6 |
Active Member
![]() Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
|
Re: Speedometer question
Mine was off also. At 20 I would clock about 35 mph. Changed the driven gear and now I'm off only by 5 mph. At 20 mph I'm actually going 25 mph. I can live with that.
Here's a couple of sites you can look at. btw: I bought the gear at the Chevy dealer for about $7.00. http://www.transmissioncenter.net/sp...n_______va.htm http://www.bgsoflex.com/speedo1.html |
![]() |
![]() |
![]() |
#7 |
Registered User
Join Date: Nov 2005
Location: Maurice,Louisiana
Posts: 169
|
Re: Speedometer question
How hard is it to change the driven gear, or does it need to be done by a professional.
__________________
2012 F150 SuperCrew 2011 GMC 1500 (COMPANY TRUCK) 1982 Chevy Blazer 2WD (Work in Progress) |
![]() |
![]() |
![]() |
#8 | |
Active Member
![]() Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
|
Re: Speedometer question
Quote:
Now if you mean the drive gear inside the tranny, than it's a different matter. You have to remove the drive shaft and the rear of the trans (name). I've never gone that far into them. |
|
![]() |
![]() |
![]() |
#9 |
Registered User
Join Date: Nov 2005
Location: Maurice,Louisiana
Posts: 169
|
Re: Speedometer question
Thanks for the information.
__________________
2012 F150 SuperCrew 2011 GMC 1500 (COMPANY TRUCK) 1982 Chevy Blazer 2WD (Work in Progress) |
![]() |
![]() |
![]() |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|