I got the 4.44 final drive and I just installed the yellow box

How many percentage is the error off by? 9%?

 

0.076576576576576576576576576575994% assuming you are on the stock tire diameter.

 

hm... so setting it at 9% would help me on mileage on the odometer!

 

Yes, or you could set it to 50% and just do the math in your head

 

(4.44 - 4.1) / (4.1) = 0.082926829268292682926829268292683

Thus, 08.29%

Hate to be the party pooper.

 

IF the Yellow Box works the same as the Yellow Jacket then 7.66% is the correct answer.

With OEM 4.10 gears at a certain speed the gear box sensor will generate 1000 pulses.
With 4.44 gears, at the same ROAD speed, that sensor will generate 8.29% more pulses, being 1083.
To get back to the proper speedo reading (the original 1000 pulses at that speed) you'll have to "lose" 83 pulses.
So you start with 1083.
(1083-1000)/10.83=7.66

IMO 7.66% is the correct correction IF the Yellow Box works the same as the Yellow Jacket.

I'm sure the Yellow Box comes with a manual and setting examples

 

My mind is blown
Awesome info as always

 

I have no idea why would you calculate it that way. (and get the wrong result)

Try 1-(4.1/4.44)=7.6576e

 

brimstone Posted on Jan 18 2007, 03:05 PM
[QUOTE]Awesome info as always

 

another idea: instead of making the adjustment of +.0765765 (or 7.657%), set the yellow box to -.6689 (or -66.89%) and switch the display to Kilometers. This will give you the correct speed and keep miles off your car. Other than being illegal I think it's a great idea.

math: (km to mi conversion 0.62137119) x (4.4 gear conversion 1.0765765) = .6689536 or -66.89%