The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 01-05-2008, 03:23 PM   #1
bad68bowtie
On the college boy budget...
 
bad68bowtie's Avatar
 
Join Date: Oct 2005
Location: Athens, Georgia
Posts: 370
Question Speedometer gear?

I'm gonna be putting some new tires on the truck hopefully in the next day or so and I'll be going down a little bit in size. I had written down somewhere how to figure up how many teeth you need on the speedometer gear but of course now I can't find it. Does anybody know how to equate this or have a link to figure it up? If one of y'all knows how to do this offhand I'm gonna be running 255/60/15 tires with a Turbo 350 and a 3.08 rear end. Thanks.
__________________
-'68 C10 short/step- 350/350
bad68bowtie is offline   Reply With Quote
Old 01-05-2008, 04:10 PM   #2
Rugman
Registered User
 
Rugman's Avatar
 
Join Date: Jan 2008
Location: Milton-Freewater Oregon
Posts: 159
Re: Speedometer gear?

I Just Went Through This I week Ago! You Need 20 Teeth. The gear is Blue.
Rugman is offline   Reply With Quote
Old 01-05-2008, 04:13 PM   #3
68gmsee
Active Member
 
68gmsee's Avatar
 
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
Re: Speedometer gear?

Here's one site. There are others.

http://www.bgsoflex.com/speedo1.html
68gmsee is offline   Reply With Quote
Old 01-05-2008, 04:18 PM   #4
BLE 'BURBAN
In the Forgotten far North.
 
BLE 'BURBAN's Avatar
 
Join Date: Jul 2007
Location: Anchorage, Alaska
Posts: 2,627
Re: Speedometer gear?

Also check out TCI TRANSMISSIONS TECH PAGE for speedo gear calculations.

http://www.tciauto.com/Products/Tech...eedo_gears.asp
__________________
1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015
1990 chevy suburban V2500 5.7L
My cluster Mods-Nov 2007
overhead console Stereo install Round 2 Aug 2009
Heated/turn signal mirror upgrade
BLE 'BURBAN is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 09:11 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com