The Stovebolt.com Forums Home | FAQ | Forum | Swap Meet | Gallery | Tech Tips | Events | Features | Search | Hoo-Ya Shop
Celebrations!!!


HAPPY
BIRTHDAY

C A N A D A

July 1

Over 2022 Bolters live "up over" ... a cool addition to the flavor of
The Stovebolt Page.


Birthday salutes here!

Stovebolt Site Search
'
Oh Lord, I just gotta find it....

A pdf guide to help you search the Site


Old Truck Calendars
Months of truck photos!
Nothing like an old truck calendar

Stovebolt Calendars

Check for details!


Who's Online Now
11 members (bwilliams, GMCJammer51, aircommando462, 68ironhead, cmayna, Bill Hanlon), 88 guests, and 3 robots.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums59
Topics128,032
Posts1,036,685
Members45,918
Most Online1,229
Jan 21st, 2020
Step-by-step instructions for pictures in the forums
Previous Thread
Next Thread
Print Thread
#1452335 Sat May 21 2022 07:42 PM
Joined: Aug 2018
Posts: 435
M
'Bolter
I've seen a gear corrector that corrects for the error in the speedometer when you change the differential gears from 4:11 to 3:55. I think I'd like to add one of these to my truck, assuming that they're still available. My question is: are they reasonably accurate, and mainly, do they hold up OK and last for a long time?


Mike Burns
1940 Chev 1/2 ton
1953 Chev 1/2 ton
1953 Ford Victoria
1950 Studebaker Starlight Coupe
Joined: Jun 2011
Posts: 4,494
E
'Bolter
Speedo shops can make up most any permanent ratio adapter for your new diff. ratio which is a routine operation for many trucks.

Ed


'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
Joined: Jan 2002
Posts: 2,259
C
'Bolter
Way back when I changed my gears to the infamous 3:55, my local speedo shop was able to produce a gear adapter. The speedo reads dead on and it's been 15+ years. I periodically check all my vehicle speedo by using a phone app call Speedbox.


Craig's '50 Chevy 3100 5 window
My truck
If I'm not working on my truck or VW camper, I'm fishing with the wife or smoking Salmon.
Joined: Mar 2010
Posts: 1,204
B
Curmudgeon
https://www.bobsspeedometer.com/products/ratio-adapters/

I haven't used them but they seem knowledgeable and willing to talk.


"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."
Joined: Sep 2001
Posts: 31,564
Bubba - Curmudgeon


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Joined: Jan 2002
Posts: 2,259
C
'Bolter
Tim,
Thanks for posting the link. Looks just like the one I'm using.


Craig's '50 Chevy 3100 5 window
My truck
If I'm not working on my truck or VW camper, I'm fishing with the wife or smoking Salmon.
Joined: Sep 2001
Posts: 31,564
Bubba - Curmudgeon
Craig, I have been using a similar ratio adapter since 2007.

As you know, if you use the measured/timed mile technique, that type of ratio-adapter adjusts for gearing and tires diameters.


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Joined: Feb 2016
Posts: 679
7
'Bolter
I used bobsspeedometer for the factory speedo and tach in my fiberglass Chevrolet, I had put new needles on them and a new circuit board for the tach. I drove to his shop, told him what I needed, he looked at what I had in my hands and knew what they were from, calibrated them on the spot while I was there, didn't want any money for the work, I gave him some money and both units are still working after 20 years.


1957 Chevrolet 5700 LCF 283 SM420 single speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto
Joined: Dec 2008
Posts: 1,090
5
'Bolter
I've also have done business with bobsspeedometer with good results.


Brian
1955.2 3100 Truck


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

Moderated by  SWEET 

Link Copied to Clipboard
Home | FAQ | Forum | Swap Meet | Gallery | Tech Tips | Events | Features | Search | Hoo-Ya Shop
Powered by UBB.threads™ PHP Forum Software 7.7.5