Gears & Axles Driveshafts | Rearends | Differentials | Gears | 12 Bolt | 9 Inch | Dana

4.10 Swap- How Much Will My Speedo Be Off?

Thread Tools
 
Search this Thread
 
Old 05-02-2005, 03:09 PM
  #1  
Banned
Thread Starter
iTrader: (92)
 
~JOSHUA's Avatar
 
Join Date: Sep 2004
Location: Atlanta
Posts: 7,757
Likes: 0
Received 0 Likes on 0 Posts
Question 4.10 Swap- How Much Will My Speedo Be Off?

I am knee deep in a gear swap. With the money I've spent on the cam and gears the last two months I'm going to wait for a month before I buy the Crane programmer. It will sit in the garage mostly 'till then. For the times I do drive it, how much will the speedo be off? 70mph for example? Any comments appreciated!
Old 05-02-2005, 03:20 PM
  #2  
12 Second Club
iTrader: (55)
 
Derek98z's Avatar
 
Join Date: Jul 2002
Location: Raymore, MO
Posts: 1,785
Likes: 0
Received 0 Likes on 0 Posts

Default

from 3.42's? Probably 10 mph @ 70
Old 05-02-2005, 03:38 PM
  #3  
Banned
Thread Starter
iTrader: (92)
 
~JOSHUA's Avatar
 
Join Date: Sep 2004
Location: Atlanta
Posts: 7,757
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Derek98z
from 3.42's? Probably 10 mph @ 70
Yeah, from 3.42's. Thanks.
Old 05-02-2005, 08:06 PM
  #4  
TECH Apprentice
iTrader: (2)
 
Murdock's Avatar
 
Join Date: Nov 2001
Posts: 377
Likes: 0
Received 0 Likes on 0 Posts

Default

It's: 4.10 / 3.42 = 1.20

Then 1.20 x Speed. So at 70mph, 1.20 x 70 = 84.

Your speedo will read 84, but you're only going 70.
Old 05-02-2005, 09:00 PM
  #5  
TECH Resident
iTrader: (4)
 
blue01ta's Avatar
 
Join Date: Apr 2005
Location: PA
Posts: 772
Likes: 0
Received 1 Like on 1 Post

Default

Dont forget that the mileage will also add up quicker as if you where covering more ground.
Old 05-02-2005, 10:25 PM
  #6  
TECH Resident
iTrader: (4)
 
pontiac's Avatar
 
Join Date: Dec 2003
Location: Huntsville, AL
Posts: 859
Likes: 0
Received 0 Likes on 0 Posts

Default

I have a SLP "speedometer fixer" wires in and lets you correct for tires and gears.
let me know if you want it works great and has complete instructions. have pics on the 2nd page of web site in sig. $50
Old 05-03-2005, 09:51 AM
  #7  
Banned
Thread Starter
iTrader: (92)
 
~JOSHUA's Avatar
 
Join Date: Sep 2004
Location: Atlanta
Posts: 7,757
Likes: 0
Received 0 Likes on 0 Posts
Default

I appreciate all the replies and the offer on the fix. I plan to get the programmer later this month so I'll be set pretty soon.




All times are GMT -5. The time now is 11:13 PM.