CorvetteForum - Chevrolet Corvette Forum Discussion

C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

New rear end...need speedo help

Thread Tools
 
Search this Thread
 
Old May 6, 2010 | 04:27 PM
Share
  #1  
6318's Avatar
6318
Thread Starter
Pro
20 Year Member
 
Joined: Nov 2003
Posts: 543
Likes: 3
From: Camden AR
Default New rear end...need speedo help
I just changed my rear from 3.08 to 3.70 in my '78...my mechanic is having problems finding the info for adjusting the speedo...any help out there?
Reply
0
Old May 6, 2010 | 05:00 PM
Share
  #2  
avner's Avatar
avner
Burning Brakes
15 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Nov 2006
Posts: 954
Likes: 40
2022 C3 of the Year Finalist - Modified
Default
You need to change the driven gear in the trans' to one with more teeth, I don't have the chart for 78, but first we need to know what trans' you have and the rear wheel dimensions if you want accurate speed readings.
Avner
Reply
0
Old May 6, 2010 | 05:56 PM
Share
  #3  
RIO68's Avatar
RIO68
Burning Brakes
10 Year Member
 
Joined: Feb 2009
Posts: 780
Likes: 1
From: Shelby NC
Default
Originally Posted by 6318
I just changed my rear from 3.08 to 3.70 in my '78...my mechanic is having problems finding the info for adjusting the speedo...any help out there?
Bowtie overdrive web site has a link with the information on speedo gears etc.
Reply
0
Old May 6, 2010 | 06:13 PM
Share
  #4  
6318's Avatar
6318
Thread Starter
Pro
20 Year Member
 
Joined: Nov 2003
Posts: 543
Likes: 3
From: Camden AR
Default
RIO68...that is exactly what I was looking for, thanks for your timely response!!!
Reply
0

Get notified of new replies

To New rear end...need speedo help

Back to Subforum
C3 Tech/Performance
View Next Unread
Rear window storage - '72




Click for Advanced Search
Reply Closed Thread Share
Forum Jump
Trending Topics

All times are GMT -4. The time now is 12:33 PM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE