Yellow Box vs Yellow Jacket
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Alright I have a 4.44 rear end in my s. My speedo seems to be about 7% off. What is the best calibration box to get, the yellow jacket or the yellow box? The yellow box has been around longer, but looks very complicated to install, and the on-line instructions really focus on motorcycles. The yellow jacket is about $40 cheaper, but I hear of problems with them too-constantly reading 0 mph. All opinions welcome. Thanks in advance.
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i helped a friend install the yellow box and have had no problems. It's not as hard and intimidating as the instructions make it out to be. The yellow jacket, on my other friends, however, had the problem reading 0 for a while... took me two days to figure it out :-/, so i kinda have bad impressions about it, but once it got working, it was fine.
BTW, how long did it take u to calculate that you were 7% off? lol.
BTW, how long did it take u to calculate that you were 7% off? lol.
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I've been using the Modifry Yellow Jacket since I installed my 4.57-R final drive and it hasn't missed a beat yet (and I won't, I'm sure)
Its all about the proper connections (goes for both yellow's
)
Get the shifter beeper from Modifry too
Very helpfull tool, you will never miss a shift again.
Beep...beep...beep...BEEEEEP (=shift)
Its all about the proper connections (goes for both yellow's
![wink.gif](https://www.s2ki.com/forums/images/smilies/wink.gif)
Get the shifter beeper from Modifry too
![thumbsup.gif](https://www.s2ki.com/forums/images/smilies/thumbsup.gif)
Very helpfull tool, you will never miss a shift again.
Beep...beep...beep...BEEEEEP (=shift)
![biggrin.gif](https://www.s2ki.com/forums/images/smilies/biggrin.gif)
![hello.gif](https://www.s2ki.com/forums/images/smilies/hello.gif)
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Absolutely. Not having to power-cycle the device in order to pickup adjustments makes the yellow jacket far easier to dial-in. I went out on the interstate, set the cruise for 70mph and turned the dials on the YJ until my speedometer and my gps had the same number. It took less than 5 minutes, no dip switches, and no thinking about how much correction to make.
![thumbsup.gif](https://www.s2ki.com/forums/images/smilies/thumbsup.gif)
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Originally Posted by jettfiery,Jul 30 2007, 03:06 AM
BTW, how long did it take u to calculate that you were 7% off? lol.
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