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Truspeed or Yellowbox?

Truspeed or Yellowbox?

3411 Views 14 Replies 10 Participants Last post by  jimmygray
Pros/Cons?
Have an '04, 5 speed, 4.88's and 35's.
Speedo is obviously reading higher than my actual speed right now. Is tach affected?
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I voted yellow box even though I have the tru-speed and it works just fine for me and gives me ZERO issues. Those that have the yellow box love it and it seems to be free from the few issues or problems that some people have experienced with the tru-speed. If I were doing it again today or if my tru-speed has to go one day, the yellow box is the one I would shoot for.
tach not affected.
Yellow box cheaper with less problems.
If you get the yellow box, save yourself the time and hook the 12 volt wire up to a switched source on the ignition harness. For some reason when I hooked it up per directions it would work for about 3 minutes and then lose the pulse from the VSS.
alpine said:
If you get the yellow box, save yourself the time and hook the 12 volt wire up to a switched source on the ignition harness. For some reason when I hooked it up per directions it would work for about 3 minutes and then lose the pulse from the VSS.
I ordered a Yellow Box. Read the thread of when you (alpine) were having problems. What was the problem/solution? I was gonna splice in right near the speed sensor and mount it in a project box somewhere real close.
My problems is the yellowbox would lose signal and the speedo would not work until I restarted the jeep and then it it would not work again after 15 or so seconds because the wire on the speed sensor does not have the power.

Solution was to hook the 12 volt wire up to a switched source on the ignition harness from the yellow box itself and run the the ground and signal wires as you are instructed to the speed sensor and mount it somewhere safe.
I traced the sensor wires to the PCM, spliced in there, got the hot wire from a switched hot and threw it behind the glove box. Sounds easy but, I was never able to conquer soldering until this project. Spent a few minutes searching YouTube and 40 years of soldering frustration was solved. :rock:
05 Rubi, 35s, 6 speed. Truespeed has been flawless, installed Oct. 2009, set speedo from police radar sign and got it right on. Took about 5 passes to get it 100%. Love my truespeed!
Ron
f9k9 said:
I traced the sensor wires to the PCM, spliced in there, got the hot wire from a switched hot and threw it behind the glove box. Sounds easy but, I was never able to conquer soldering until this project. Spent a few minutes searching YouTube and 40 years of soldering frustration was solved. :rock:

Could do it that way too, just was easier to grab the harness at the TC Sensor for me.
I'm running a "Dakota Digital" and it works great plus it is much cheaper than either the Truspeed or the Yellowbox. Check it out.
I don't know how much these are, but why not just get a programmer I had a super chips on my f150 and I could program gear size, tire size, and I got a butt load of power out of it.
jimmygray said:
I don't know how much these are, but why not just get a programmer I had a super chips on my f150 and I could program gear size, tire size, and I got a butt load of power out of it.

Had my dealer flash the chip several times without any change. They tried leaving the battery hooked up and unhooking it before and after flashing. Finally gave up and went with Yellow Box. Works great.
I'm not talking about getting your chip flashed I'm talking about a hand held programmer. Like a hypertech, superchips, etc.
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