dealer said Chrysler wants $350 to "subscribe" to larger tires to adjust my speedometer?!?!?!?!?

[panic1013]

I have a 2021 1500 Limited. 2 weeks ago I had Discount Tire replace my stock 285/45r22 for 285/55r22 Recon Grapplers. As such, my speedometer is off by about 6 MPH at 60MPH. I have read on this board many went to their dealer for $125-$150 and had the speedometer adjusted so I set an appointment. I went today and service rep came back and said to "get the codes" Chrysler wanted me to "subscribe" to larger tires at a cost of $350. What the hell is this? Needles to say I did not pay and left.

 

[Eighty]

As I understand it, it's not YOU that needs to subscribe to that fee. It's the shop - they have to pay FCA for the updated dataset (or whatever it is) so that they can calibrate your truck. Since they probably feel that they wouldn't use it again, it sounds like they want you to pay it for them.
Similar to a shop saying they've never needed a certain type of wrench before, so they want you to buy that tool for them (that will sit in the corner for the rest of eternity after the one time use).

 

[Idahoktm]

A good reason to do the calibration yourself. You can spend ~$100 for AlfaOBD or pony up $300 for Tazer DT.

 

[6of36]

Dealers charge what they want for programming. Call around. Back in about 2017, I bought my pontoon boat while on vacation. I wasn't expecting to, so we had taken gf's Grand Cherokee, that didn't have a hitch. I bolted on the hitch in the hotel parking lot, and found out, that all the trailer wiring was there, except the plug, which just plugged into the harness. Then I found out it had to be programmed. I called a few dealers between where I was, and where I was getting the boat. I got a couple prices of $150, and $200. Then I found a dealer who did it for me for $50. I don't think any dealer will do it that cheap anymore, but make some calls, or buy your own programmer.

 

[boogielander]

AlfaOBD will be the most economical way. You open yourself to a whole host of things you can do with it too as added benefit.

 

[Cbty2050]

As I understand it, it's not YOU that needs to subscribe to that fee. It's the shop - they have to pay FCA for the updated dataset (or whatever it is) so that they can calibrate your truck. Since they probably feel that they wouldn't use it again, it sounds like they want you to pay it for them.
Similar to a shop saying they've never needed a certain type of wrench before, so they want you to buy that tool for them (that will sit in the corner for the rest of eternity after the one time use).

It's an option you purchase for the truck, it can only be used on that vin and not transfered. It also has to be used/tire size updated within a certain amount of time. I think the cost from Stellantis is $125 and the dealer can mark it up if they want. Unfortunately many do, it's like marking up an extended warranty or service contract.

 

[moosem]

My local dealership also wanted $350 to calibrate the Speedo on my truck, but they would not guarantee that Park Sense would still work.

I ended up doing it myself with AlphaOBD. Even with AlphaOBD, or any other method as far as I know, you can only go up to a certain tire size before the Park Sense stops working. I only went from 32” to 33” so this did not affect me.

With that said, the dealer did bring up an interesting point that I still have not been able to confirm or deny. They said that they do not recommend increasing the tire size because if the windshield ever needs to be replaced the Adaptive Cruise Control and Forward Collision Warning camera cannot be calibrated if the truck is no longer at stock ride height.

Does anyone have any firsthand experience with this?

 

[Cbty2050]

My local dealership also wanted $350 to calibrate the Speedo on my truck, but they would not guarantee that Park Sense would still work.

I ended up doing it myself with AlphaOBD. Even with AlphaOBD, or any other method as far as I know, you can only go up to a certain tire size before the Park Sense stops working. I only went from 32” to 33” so this did not affect me.

With that said, the dealer did bring up an interesting point that I still have not been able to confirm or deny. They said that they do not recommend increasing the tire size because if the windshield ever needs to be replaced the Adaptive Cruise Control and Forward Collision Warning camera cannot be calibrated if the truck is no longer at stock ride height.

Does anyone have any firsthand experience with this?

Simply not true. Small lifts and tire size increase can be calibrated. I know large lifts can cause issues with the systems.

 

[VectorZ]

JScan is another option, it's pretty limited with options, but you can easily change your tire size. My winter and summer tires are different sizes so I have to change them twice a year.

 

[TyH2009]

Are you stock ride height with the 285/55/22’s?

 

[BlueHorn86]

On all the DT trucks, if tire size is programmed over 33.75" the front and rear park assist sensors (if equipped) will automatically disable.

In order for a dealer to change your tire size, you need to purchase a new tire size sales code basically. It's done the same way as purchasing an extended warranty through FCA's system, and is only applied to that VIN. Then the dealer would update the trucks build configuration with the scan tool. It's no longer an option we can just go in and change.

If you plan to change tire sizes again or have two different sets (summer/winter) I'd recommend an aftermarket programmer. Personally I use Hypertech's speedo calibrator. Either way, measure the actual tire height on the vehicle, rather than a size calculation or the sidewall. I programmed 33.75" for my 35s and it's spot on.

 

[Dewey]

Watch for a used Tazer. I got mine for $200. Very easy to change tires size with it.

 

[boogielander]

On all the DT trucks, if tire size is programmed over 33.75" the front and rear park assist sensors (if equipped) will automatically disable.

In order for a dealer to change your tire size, you need to purchase a new tire size sales code basically. It's done the same way as purchasing an extended warranty through FCA's system, and is only applied to that VIN. Then the dealer would update the trucks build configuration with the scan tool. It's no longer an option we can just go in and change.

If you plan to change tire sizes again or have two different sets (summer/winter) I'd recommend an aftermarket programmer. Personally I use Hypertech's speedo calibrator. Either way, measure the actual tire height on the vehicle, rather than a size calculation or the sidewall. I programmed 33.75" for my 35s and it's spot on.

so even with AlfaOBD if I change mine from 33s to 35s my park assist sensors won't work?

 

[Mountain Whiskey]

This is just one more advantage to learning how to park all by yourself. My sensors are not disabled by a lift or tires.

 

[moosem]

This is just one more advantage to learning how to park all by yourself. My sensors are not disabled by a lift or tires.

I doubt most people actually need the sensors to park, but it’s pretty annoying to have a bunch of dummy lights illuminated on your dash.

 

[WXman]

A good reason to do the calibration yourself. You can spend ~$100 for AlfaOBD or pony up $300 for Tazer DT.

AlfaOBD will be the most economical way. You open yourself to a whole host of things you can do with it too as added benefit.

Alfa is a PITA to learn how to use compared to Tazer though. And it requires a cable or dongle, downloaded software, laptop, etc...

On all the DT trucks, if tire size is programmed over 33.75" the front and rear park assist sensors (if equipped) will automatically disable.

In order for a dealer to change your tire size, you need to purchase a new tire size sales code basically. It's done the same way as purchasing an extended warranty through FCA's system, and is only applied to that VIN. Then the dealer would update the trucks build configuration with the scan tool. It's no longer an option we can just go in and change.

If you plan to change tire sizes again or have two different sets (summer/winter) I'd recommend an aftermarket programmer. Personally I use Hypertech's speedo calibrator. Either way, measure the actual tire height on the vehicle, rather than a size calculation or the sidewall. I programmed 33.75" for my 35s and it's spot on.

My '22 is currently programmed over 33.75" and my sensors still work. I know because they annoy the hell out of me when I'm off road so I hit the button on the console to turn them off.

 

[TyH2009]

So Tazers DO work for 2022’s? I had thought I read that they didn’t, but it maybe was an old thread and firmware wasn’t out yet.
I have an appointment in April (soonest appt available) with a dealer to try and get mine recalibrated, they said they needed to hook mine up and “scan” to see if it can be done, but if there’s an easier/quicker way like using a Tazer.

 

[HemiDude]

The Tazer does work with 2022s, the issues that it has seem to be with Uconnect five

 

[Condor757]

My dealer did it for $150. In an out in less than an hour. Sounds like they were trying to rip you off

 

[BlueHorn86]

Alfa is a PITA to learn how to use compared to Tazer though. And it requires a cable or dongle, downloaded software, laptop, etc...



My '22 is currently programmed over 33.75" and my sensors still work. I know because they annoy the hell out of me when I'm off road so I hit the button on the console to turn them off.

What did you use to program it? When I was deciding which programmer to buy, that was the common issue with all of them, and I tested with my Hypertech, it was like I had pressed the off switches and couldn't turn them back on. Personally I never wanted the sensors to begin with but couldn't get my heated seats and steering wheel without that too haha