I recently put 33" tires on my Jeep and have noticed the speedo is off by about 5 mph at highway speeds. What is the best speedometer fix tool for a 2006 Rubicon? Thanks for any advice!
Best speedometer fix for Rubicons in 2024?
- Thread starter Arthurius
- Start date
Options:
The options all do the same thing - generally speaking - but at different price points and different difficultly levels for adjustment. I believe Blaine preferred the JET device in the past, but has had trouble with them in recent iterations. I can't recall who specifically, but i know the other options have been used on the forum as well.
EDIT: looks like the JET might have been discontinued.
The options all do the same thing - generally speaking - but at different price points and different difficultly levels for adjustment. I believe Blaine preferred the JET device in the past, but has had trouble with them in recent iterations. I can't recall who specifically, but i know the other options have been used on the forum as well.
EDIT: looks like the JET might have been discontinued.
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OP
LONGJP2
TJ Expert
I've had good luck with my speedo healer for almost three years. The install is easy, but it's important to smartly route over the transmission staying clear of pinch points and the exhaust...mine is wire loomed for added abrasion resistance.
FWIW, the screen is connected to the side of my PDC and has held up well to vibrations and summer/engine heat. I haven't touched it since setting it up using a GPS app.
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4WP looks to have discontinued carrying all Jet Performance Products items. It is still listed as available on the Jet website as well as several retail websites. I can't speak to current QC of the product, though.
the absolute best one is FREE. I have the same set up and my speedo is off by about 10% ! so if i'm running 50 my brain knows to adjust it to 55 ! if I'm running 60 it says "HEY YOUR DOING 66MPH ! NOW if you need more corrections or your from ALABAMA you probably need to use a calculator 
NOW y'all from ALABAMA probably need to watch a few videos on using a calculator 1st !!!!!!!!!!!!!!!!!!!!
NOW y'all from ALABAMA probably need to watch a few videos on using a calculator 1st !!!!!!!!!!!!!!!!!!!!
OP
I have been doing that since installing the tires at the last oil change. Then I realized my odometer is affected too and I want to make sure my mileage-based maintenance schedule doesn't get put off.
It may be overthinking it but it's the little things that get ya!
I left mine alone. Why would it matter if the speedo is accurate if I never drive the speed limit. 
p.s.
I do have BM brakes though, for fast stops when I see a cop with radar.
p.s.
I do have BM brakes though, for fast stops when I see a cop with radar.
I left mine alone. Why would it matter if the speedo is accurate if I never drive the speed limit.
I prefer my odometer to better reflect the actual miles traveled. And I check my MPG during my stops at the pump because I'm sick in the head.
I left mine alone. Why would it matter if the speedo is accurate if I never drive the speed limit.
p.s.
I do have BM brakes though, for fast stops when I see a cop with radar.
Do you know why I pulled you over, sir?
"Because I was doing 68 in a 70?"
(according to my dash)
rouxbicon
TJ Enthusiast
My Speedohealer has worked fine for seven years/33k miles. I agree it's probably not the most intuitive to configure, but hey, if I figured it out I would guess that most can.
IIRC, it's no more difficult than doing the math to correctly determine your MPG when the gearing is off.
OP
I just put on new tires and am checking the MPG at every fill up to get an average! Lol that's where this mostly started.
No complaints with the speedo healer simple math to get the right number and a little work on the input side.
Can confirm.
I've got a renewed "justification" for my sickness since significantly raising my 3-4 and 4-3 shift points (based on throttle %) and seeing my MPGs increase.
I'm now using a schedule that plays really well with the turbo by keeping me in 3 unless I'm basically off the throttle in town or going around 60+mph. In town, 4 smoothly kicks to 3 by barely pressing the throttle, yet holds boost in 4 at highway speeds like it should.
But, I'd still be checking my mpg regardless...I have specific pumps I prefer to go to for repeatability. It's fun for me...and I'm an idiot.