2012 OEM wheel upgrade
Thread Starter
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Laughing Gas
Joined: May 2007
Posts: 812
Likes: 3
From: Mad River Valley
Talked to the dealer. They said they need to check if this is an option within the computer's perimeters. If it is, then they can reprogram. If not, then obviously the speedo could be off. And maybe I'll get a CEL. I've asked them about the CEL.
I can live with the speedo but I think a CEL would annoy me.
Thanks to everyone for their feedback.
I can live with the speedo but I think a CEL would annoy me.
Thanks to everyone for their feedback.
Elder User
Joined: Apr 2010
Posts: 754
Likes: 0
Talked to the dealer. They said they need to check if this is an option within the computer's perimeters. If it is, then they can reprogram. If not, then obviously the speedo could be off. And maybe I'll get a CEL. I've asked them about the CEL.
I can live with the speedo but I think a CEL would annoy me.
Thanks to everyone for their feedback.
I can live with the speedo but I think a CEL would annoy me.
Thanks to everyone for their feedback.
If you have the 3.55 axle this is probably not an issue for you.
Thread Starter
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Laughing Gas
Joined: May 2007
Posts: 812
Likes: 3
From: Mad River Valley
My gear ratio is 3.73 (gas) and there wasn't a 20 inch wheel offered on the 2012's. The 20 is offered on the 2013 as far as I know, but I'm not sure if it's paired up with a specific ratio.
Anyway, I need an oil change anyway. On Friday the dealer will take a look at the PCM to see if there is a 20 inch option, but that seems doubtful at this point.
Is the CEL on all the time in the case of the mismatch that you've described?
Anyway, I need an oil change anyway. On Friday the dealer will take a look at the PCM to see if there is a 20 inch option, but that seems doubtful at this point.
Is the CEL on all the time in the case of the mismatch that you've described?
Elder User
Joined: Apr 2010
Posts: 754
Likes: 0
My gear ratio is 3.73 (gas) and there wasn't a 20 inch wheel offered on the 2012's. The 20 is offered on the 2013 as far as I know, but I'm not sure if it's paired up with a specific ratio.
Anyway, I need an oil change anyway. On Friday the dealer will take a look at the PCM to see if there is a 20 inch option, but that seems doubtful at this point.
Is the CEL on all the time in the case of the mismatch that you've described?
Anyway, I need an oil change anyway. On Friday the dealer will take a look at the PCM to see if there is a 20 inch option, but that seems doubtful at this point.
Is the CEL on all the time in the case of the mismatch that you've described?
My speedometer is exact now with my new tires based on my GPS, so I don't plan on doing anything at this point.
Let us know what you find out.
Thread Starter
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Laughing Gas
Joined: May 2007
Posts: 812
Likes: 3
From: Mad River Valley
Update:
I picked up the 20 inch OEM wheels and had the dealer road force balance them yesterday and put them on. They also recalibrated the computer for the new size. The TPMS set up is identical to my 18 inch ones so nothing new was needed. Wheels look great and they seem to ride better than my 18's, probably due to the road force balance.
Hopefully this info helps out anyone looking to do the same things. Thanks to all who helped out with this.
I picked up the 20 inch OEM wheels and had the dealer road force balance them yesterday and put them on. They also recalibrated the computer for the new size. The TPMS set up is identical to my 18 inch ones so nothing new was needed. Wheels look great and they seem to ride better than my 18's, probably due to the road force balance.
Hopefully this info helps out anyone looking to do the same things. Thanks to all who helped out with this.
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From: Gilbert
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Fleet Owner
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10 char is the minimum number of characters for a post. He just wanted the smiley, but needed to hit the minimum. As John has informed the site, you can also us <fillllllll> the number of "l" is the number of characters needed to meet the 10 requirement.
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What were the magic words you said to get the dealer to reprogram the computer with the correct tire size and gear ratio combo?
I picked up a set of the factory chrome 18s for my XLT with 17s. It'll be a simple balance, swap, reprogram sensors and reprogram computer procedure. I have three dealers near me that I asked for pricing, all with wildly varying responses.
- Landmark Ford in Tigard was at least willing to do the thing, though they weren't sure of how to alter the speedo reading.
- Damerow in Beaverton was unwilling to get involved at all, saying it would void the warranty. They continued this line of argument when I pointed out that the new set is factory wheels, factory tires and factory sensors. They also had a speedo shop in mind for me to talk to to physically alter the speedo.
- Dick's in Hillsboro wants $120 for the programming change alone.
I picked up a set of the factory chrome 18s for my XLT with 17s. It'll be a simple balance, swap, reprogram sensors and reprogram computer procedure. I have three dealers near me that I asked for pricing, all with wildly varying responses.
- Landmark Ford in Tigard was at least willing to do the thing, though they weren't sure of how to alter the speedo reading.
- Damerow in Beaverton was unwilling to get involved at all, saying it would void the warranty. They continued this line of argument when I pointed out that the new set is factory wheels, factory tires and factory sensors. They also had a speedo shop in mind for me to talk to to physically alter the speedo.
- Dick's in Hillsboro wants $120 for the programming change alone.