37" Tire Owners - have a question

[Fifty]

I have the same issue with the Tazer DT. Spoke to Tazer support and they confirmed it was the ECM issue and it would not allow any size above 35. Suggested having dealer place a case and hopefully enough cases would be submitted for a software upgrade later.

There were enough car ads where somebody from Stellantis said that a 37 would fit the TRX; that’s if people start emailing stellantis/ram and filing complaints with the the appropriate people…

Then they will take note. You can’t have ram PR people saying the truck can run 37’s and then not allow it.

 

[Erik]

Anything new with this problem? I have 37" wheels, a Tazer DT with the latest software and my parking sensors are off/not working. Still no solution ?

 

[Elarson6772]

Anything new with this problem? I have 37" wheels, a Tazer DT with the latest software and my parking sensors are off/not working. Still no solution ?

Not that I am aware of, nor my dealer. This is one of three issues I’ve had with mine for the year I have owned it and there is no fix in sight for any of the problems. Have to admit at this point it feels like Ram doesn’t care and isn’t going to resolve the issues. @RamCares

 

[Erik]

Not that I am aware of, nor my dealer. This is one of three issues I’ve had with mine for the year I have owned it and there is no fix in sight for any of the problems. Have to admit at this point it feels like Ram doesn’t care and isn’t going to resolve the issues. @RamCaresRamcares only care about potential customers who are considering spending a lot of money on a car, if they go for RAM they become more uninteresting. I have had a very bad experience with RAM customer service in the US and also with the importer of RAM cars into the EU, AEC Europe, regarding 37" tires. They both brushed me off as if I was asking them for change for food on the street... The rules are much more strict here. stricter than in the USA and that's why we can't put anything else on the car other than what's in the technical license. Since the RAM TRX (the strongest, best Offroad car in the world and other blah, blah blah) has only one size of rims - R18 and only one tire size of 325 - officially allowed /65/R18, so of course we have no other option to put anything else on the car in order not to lose the insurance or risk a big fine from the Police. Every old VW Golf, Audi, BMW, Toyota, Land Rover and other cars have in their technical shows 5-10 different types of wheels and tires (some even with a note that they can only be used up to a certain speed, or only after adjusting the height), but the "powerful" TRX is like a naked child with a roll in his hand in the middle of the street ... a shame !

Not that I am aware of, nor my dealer. This is one of three issues I’ve had with mine for the year I have owned it and there is no fix in sight for any of the problems. Have to admit at this point it feels like Ram doesn’t care and isn’t going to resolve the issues. @RamCares

RAM Customer care only care about potential customers who are considering spending a lot of money on a car, if they decide for RAM, they become uninteresting to them. I have had a very bad experience with RAM customer service in the US and also with the importer of RAM cars into the EU, company AEC Europe, regarding 37" tires. They both brushed me off as if I was asking them for change for food on the street ...
The rules are much more strict here in EU. stricter than in the USA and that's why we can't put anything else on the car other than what's in the technical license. Since the RAM TRX (the strongest, best Offroad car in the world and other blah, blah blah) has only one size of rims - R18 and only one tire size officially allowed 325/65/R18, so of course we have no other option to put anything else on the car in order not to lose the insurance or risk a big fine from the Police.
Every old VW Golf, Audi, BMW, Toyota, Land Rover and other cars have in their technical licenses 5-10 different types of wheels and tires (some even with a note that they can only be used up to a certain speed, or only after adjusting the height), but the "powerful" TRX is like a naked child with a roll in his hand in the middle of the street ... a shame !

 

[Hello4x]

This is still impacting me as well. Impacting everyone running 37s which appears to be growing daily…

 

[Boosted]

The fix needs to come from RAM and not from the makers of Tazers. Sadly unless RAM decides to equip TRX's with 37's from the factory, we will probably not ever see a fix.

 

[Erik]

The fix needs to come from RAM and not from the makers of Tazers. Sadly unless RAM decides to equip TRX's with 37's from the factory, we will probably not ever see a fix.

... good to know, next time I will definitely buy a car from a manufacturer that takes care of its customers after the purchase, not just "rubbing honey around their mouths" before the purchase. The Raptor, for example, is 37" from the factory! And here in Europe, it also has more disc and tire options in the technical license.

 

[Elarson6772]

Update!

I spoke at length with a tech from Hypertech earlier today. They were aware of this issue pretty quickly and have already put out a solution! The part number is 730133T. It isn’t a traditional programmer but rather a small one that gets installed inline between the oem cluster cable and the cluster itself. You program it for your tire size via a PC and then install by plugging one end of it into the cluster and then the oem cluster cable into the other end. It has been tested and resolves the issues that arise when you try to program it other ways and run into issues with the parking sensors, and other options as well including those in the advanced safety group.

I ordered while I was on the phone. Fixed Minimum pricing of $279.

I’ll know when it gets here if I can confirm it works. Note it also has nothing to do with the ECM or BCM and does not need to be removed when taken in for service unless there is a dash cluster concern.

Eric

 

[Fifty]

Curious. Following the hyper tech fix.

I know on the 17+ Gm the hype tech worked if it was a tire size change only and only a small change. The trucks use multiple speed sensors and if this kit only manipulates one.
The others show diffeeent and the t/c and abs and speed limiter start to freak out.

This will be awesome if this makes the parking sensors happy.

 

[Tyler4]

Following - I also want 37's but there are two things keeping me from pulling the trigger; this issue and the spare tire issue. Hopefully we can get a fix for this one.

I'm assuming the Hypertech can be used with a Tazer?

 

[Kojak]

Set tire size to 36.5 which is under 37 and closer to the actual size of a 37.

Does that make parking sensors work?
Or is it anything over 35 that causes them to turn off?

 

[jqram25]

No update I guess

 

[Boosted]

Does that make parking sensors work?
Or is it anything over 35 that causes them to turn off?

No, it will turn off the parking sensors

 

[10mpg]

No, it will turn off the parking sensors

as in 35.0? or can you do like 35.5 to get it slightly closer

 

[Boosted]

as in 35.0? or can you do like 35.5 to get it slightly closer

Not sure what the threshold is. I’m currently on 35’s but it I remember correctly, when I was on B 37’s I had it set slightly above 35”

 

[Cromin8tor]

Try this:

RAM 1500 Spectrum Speedometer Calibrator (18-23 RAM 1500) - Free Shipping

FREE SHIPPING! Corrects Speedometer / Odometer. If you have installed tires that are larger or smaller than original equipment tires, or if you have installed a

www.americantrucks.com

 

[Elarson6772]

Try this:

RAM 1500 Spectrum Speedometer Calibrator (18-23 RAM 1500) - Free Shipping

FREE SHIPPING! Corrects Speedometer / Odometer. If you have installed tires that are larger or smaller than original equipment tires, or if you have installed a

www.americantrucks.com

Unfortunately, that’s doesn’t work either. Hypertech has a inline unit that works to correct the speedo but the cruise set speed is still wrong and it created other issues with my cluster so I sent it back.

I’ve had a @RamCares case open with this issue and another for a while. The end result on this issue is that it is all 5th gen Ram 1500’s and there is no fix now nor will there be one in the future. They didn’t disclose why they wouldn’t fix it, but I suspect it’s such a small percentage of Ram owners it isn't worth spending the time on. Not unlike the aux switch “retain last state” issue.

 

[RamCares]

Unfortunately, that’s doesn’t work either. Hypertech has a inline unit that works to correct the speedo but the cruise set speed is still wrong and it created other issues with my cluster so I sent it back.

I’ve had a @RamCares case open with this issue and another for a while. The end result on this issue is that it is all 5th gen Ram 1500’s and there is no fix now nor will there be one in the future. They didn’t disclose why they wouldn’t fix it, but I suspect it’s such a small percentage of Ram owners it isn't worth spending the time on. Not unlike the aux switch “retain last state” issue.

Hey,

If you're looking for some additional assistance on this, please send us a direct message with your case number. We'd be happy to look into your case for you.

Callie
Ram Cares

 

[Elarson6772]

Hey,

If you're looking for some additional assistance on this, please send us a direct message with your case number. We'd be happy to look into your case for you.

Callie
Ram Cares

Hi Callie,

The case number is 84034205. It’s still open for an AUX switch issue that remains unresolved since the TRX was launched that exists on all 2021 TRX’s.

The inability to adjust tire size on the TRX to accommodate larger tires exists on all TRX trucks and literally all 5th gen Ram 1500’s. It basically came down to my case manager telling me that there is no fix for it and nothing planned. Very disappointing given when the TRX was launched, the fact that it was ready for 37’s was a regular talking point. Oh and by the way, your only competitor, the Ford Raptor, fits 37’s and the truck can easily be adjusted so the speedometer is correct with the larger tires.

 

[RamCares]

Hi Callie,

The case number is 84034205. It’s still open for an AUX switch issue that remains unresolved since the TRX was launched that exists on all 2021 TRX’s.

The inability to adjust tire size on the TRX to accommodate larger tires exists on all TRX trucks and literally all 5th gen Ram 1500’s. It basically came down to my case manager telling me that there is no fix for it and nothing planned. Very disappointing given when the TRX was launched, the fact that it was ready for 37’s was a regular talking point. Oh and by the way, your only competitor, the Ford Raptor, fits 37’s and the truck can easily be adjusted so the speedometer is correct with the larger tires.

Thank you so much for providing this information and for your feedback. Your case manager is working towards a resolution for you. Additionally, we've noted your frustrations.

Callie
Ram Cares