Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
07-09-2009, 08:39 PM | #1 |
Senoir Member
Join Date: Mar 2002
Location: Rock Hill, SC USA
Posts: 1,214
|
How to figure out the Speedo gears.
Can someone explain how to determine the proper speedo gears if changing rear axle gears. I have the 402/th400 2wd with 3.07 posi & 29" tires (275-60-15), and I believe the speedo is correct now. I'm thining of going to a 3.42 ratio, but all the other stuff with stay the same. This will cause the speedo to be off one way or the other.
I keep meaning to put the GPS in the truck and check the speedo, but you know.....
__________________
67 Chevy, Small back glass, Factory 4WD, Factory Shortbed, Factory V8, Lifted 4" 70 GMC Sierra Grande, Factory Shortbed, Factory 402/400 turbo, Super Custom Interior. Numbers matching with SPID & Build Sheet. 68K Original Miles. Restored 2010 70 GMC Restoration Pictures http://67-72chevytrucks.com/gallery/...00&ppuser=4424 |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|