Speed Sensor Recalibrator
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Posting Guru
Joined: Jun 2003
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From: southwest michigan
Speed Sensor Recalibrator
I saw this little gem over at BroncoGraveyard.
Superlift Speed Sensor Recalibrator
I was wondering. Other than not wanting to hit the 5 time limit on the OEM computer, is there any other reason to use one of these. I guess I was just thinking that the PO had 30's on the truck when I bought it, and the speedo seemed right on running my bald 31's, so I'm wondering if the computer may have been adjusted already.
Would it be worth installing on of these or is it not worth the money?
Superlift Speed Sensor Recalibrator
I was wondering. Other than not wanting to hit the 5 time limit on the OEM computer, is there any other reason to use one of these. I guess I was just thinking that the PO had 30's on the truck when I bought it, and the speedo seemed right on running my bald 31's, so I'm wondering if the computer may have been adjusted already.
Would it be worth installing on of these or is it not worth the money?
Postmaster
Joined: Aug 2005
Posts: 4,728
Likes: 8
From: Cleveland, TN
I'm guessing they hope people don't know the speed can be changed on the truck, and are betting they can make a bunch of $$$$$..
And, at $189 a pop they probably will...
It might be alright if you changed tire size according to season...
And, at $189 a pop they probably will...
It might be alright if you changed tire size according to season...
Freshman User
Joined: Aug 2003
Posts: 25
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From: Oregon
How do you change it on the truck? I have been wanting to change mine for years and just put it off because of cost. But if there is another way to do it without buying that superlift calibrator!!! Do tell.
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Posting Guru
Joined: Jun 2003
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From: southwest michigan
Check out this quote. I thought there was an article on fordfuelinjection.com but I can't find it now.
Programing for tire size,
Locate the connector at the bottom of the instrument panel below the center of the glove box. Should be LB/Y, has "PSOM" printed on the connector in white lettering. Held in place with a plastic retainer.
Insert a jumper wire or alligator clip in service wire and clip other end to vehicle ground with the key in the OFF position.
Turn key to RUN while holding down the trip odometer RESET button on the speedometer.
Release RESET button The Speedometer will prove out(sweep across dial and back). The English/Metric and revision levels will be displayed. The last number of the display id the dealer mode lockout count. This count shows the number of allowable conversion constant changes remaining. When the count is zero (0), no additional changes can be made to this instrument cluster. If a revisions required a service instrument cluster must be ordered.
Press and release RESET button again and PSOM conversion constant without the decimal point will be displayed followed by the word CAL.
Press and release the odometer SELECT button as many times as necessary to change the conversion constant to the correct value. The constant will only increase (not decrease) when the SELECT button is pressed so reducing the constant means counting up until the constant jumps to the bottom of the scale and begins counting up from there.
Pressing and releasing the RESET button to lock in the new conversion constant reduces the number of times the PSOM can be reprogrammed by one count. If you change your mind and want to go back to the old conversion constant, turn the key OFF BEFORE you lock in the new constant.
You should be able to get your tires conversion constant from the manufactures web site.
Here is more if you want to do the "math" for yourself, https://www.ford-trucks.com/forums/7...tire-size.html
Locate the connector at the bottom of the instrument panel below the center of the glove box. Should be LB/Y, has "PSOM" printed on the connector in white lettering. Held in place with a plastic retainer.
Insert a jumper wire or alligator clip in service wire and clip other end to vehicle ground with the key in the OFF position.
Turn key to RUN while holding down the trip odometer RESET button on the speedometer.
Release RESET button The Speedometer will prove out(sweep across dial and back). The English/Metric and revision levels will be displayed. The last number of the display id the dealer mode lockout count. This count shows the number of allowable conversion constant changes remaining. When the count is zero (0), no additional changes can be made to this instrument cluster. If a revisions required a service instrument cluster must be ordered.
Press and release RESET button again and PSOM conversion constant without the decimal point will be displayed followed by the word CAL.
Press and release the odometer SELECT button as many times as necessary to change the conversion constant to the correct value. The constant will only increase (not decrease) when the SELECT button is pressed so reducing the constant means counting up until the constant jumps to the bottom of the scale and begins counting up from there.
Pressing and releasing the RESET button to lock in the new conversion constant reduces the number of times the PSOM can be reprogrammed by one count. If you change your mind and want to go back to the old conversion constant, turn the key OFF BEFORE you lock in the new constant.
You should be able to get your tires conversion constant from the manufactures web site.
Here is more if you want to do the "math" for yourself, https://www.ford-trucks.com/forums/7...tire-size.html
Freshman User
Joined: Aug 2003
Posts: 25
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From: Oregon
Thats intense! Those guys are doing mild tire changes. I have 37's on my truck, I don't have a degree in math that advanced to figure those formulas out. HOLLY CRAP! Maybe I'll just take mine into the dealer to adjust it. I bet my tranny will start shiftin' at the right points too!
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Posting Guru
Joined: Jun 2003
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From: southwest michigan
you might be able to find an online calculator or something, dunno I guess it would take some looking. I don't want to do it until I get my gears in though. Especially since it's limited to 5 changes.
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Fleet Owner
Joined: Oct 2005
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From: Kentucky
This article from Steve83 covers most of the bases. It also includes a link to a PSOM Calculator: What's a PSOM & how do I "P" it???
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Posting Guru
Joined: Jun 2003
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From: southwest michigan
WHAT?!! This whole time I thought that your gear & tire affect the PSOM. So it's based on the axle turns not the drive shaft turns?
<--- This is what I plan on doing after work.
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Posting Guru
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From: southwest michigan
I recalibrated yesterday afternoon at work. (not after work like I had planned, because I didn't finish work until 4am). I didn't think it would make much of a difference in driveability. Wowsa, the trucks really woke up. Other than 0-15mph being sluggish from the gear/tire combo. The tranny handles the new tires awesomely and the truck pulls so much harder now.
I fell like it's better than when I had the 31's and uncalibrated speedo.
I fell like it's better than when I had the 31's and uncalibrated speedo.