How can the TPMS pressures be changed

[CFollett]

Bought a used 14 Laramie, 2500, less that 16 k on it, WOW what a truck. Really happy with it , But can the TPMS pressures be changed ? 80 psig in the rear when not towing is a bother ! Can the dealer change the low set-point to a more live-able pressure ( 60 ) by reprogramming ?

 

[sag2]

He can but he won't because by law he has to set at the placard pressure on the door. I have seen quite a few Jeeps with a defeat for the TPMS but I can't understand how they can sell it legally. It plugs into the DLC and uses DIP switch positions to program axle ratios and TPM info.

 

[Jim W]

I hate TPMS on my truck it is never correct since I air the tires per the tire manufactures inflation tables for a given load. In fact the last set of tires and rims I just purchase to run this summer do not have the sensors in them. It is a crutch for lazy people who think the tire is being monitored for them all of the time regardless of tire wear. I would guess that most are over inflated do to being filled with air when running hot by tire installers such as Discount tires. When the end users comes in do to the TPMS sensor saying they have low air pressure in the tires and they are inflate while the tire is hot.

My third gen truck has two set points for the rear tires; light load 45PSI and loaded at 70PSI. When the tires are at 45PSI the TPMS dings and the light will illuminate telling my I am under inflated. Black tape works great. And I know about the light load button and to have the dealer fix this. I have tried several times when the truck was new never ever ran correctly.

Jim W.

 

[sag2]

The TPM in the wheel is far more accurate than most pressure gauges. Not sure why you don't think it is unless you don't have the premium system that displays the actual pressure on the cluster. They are accurate to .1 psi with the scan tool.

 

[AlFischer]

I have considered contacting the NTSB as I see this situation as a serious safety hazard. If pn my RAM I set the rears at 80 and have to stop quick on a wet road it will most likely break traction and increase the braking distance. Or go out of control.

Or we coul put together a class action suit against RAM.

 

[AlFischer]

He can but he won't because by law he has to set at the placard pressure on the door. I have seen quite a few Jeeps with a defeat for the TPMS but I can't understand how they can sell it legally. It plugs into the DLC and uses DIP switch positions to program axle ratios and TPM info.

What is the brand of he device and where can I get one?

 

[TFucili]

I would assume it's the AEV ProCal. The Jeepers have been using them. They don't have one for our trucks, but they are starting to develop Ram stuff, so here's hoping.

http://www.aev-conversions.com/shop/products/tools-accessories/procal-module

 

[AlFischer]

i would assume it's the aev procal. The jeepers have been using them. They don't have one for our trucks, but they are starting to develop ram stuff, so here's hoping.

http://www.aev-conversions.com/shop/products/tools-accessories/procal-module

i want one!!!

 

[TFucili]

i want one!!!

Me too! LOL

ON EDIT:
I contacted AEV and was told they are going to release a ProCal for the Rams, but without as many functions. Initially, TPMS will not be there, as they said the system used on the trucks is substantially different that that used on the Jeeps. I would guess that means they have not cracked it yet, or can't control the parameters reliably. Ram stuff is coming, but we gotta be patient, I suppose.

 

[sag2]

I have considered contacting the NTSB as I see this situation as a serious safety hazard. If pn my RAM I set the rears at 80 and have to stop quick on a wet road it will most likely break traction and increase the braking distance. Or go out of control.

Or we coul put together a class action suit against RAM.

So you can sue them for having the pressure at the placard PSI which is the Federal law, and the other half can sue them for under inflating the tires with a load and blowing out a tire. They are following the law, so if you don't like it vote the morons out of office that make all the stupid laws to protect the morons that can't think for themselves.

 

[Missouri Mule]

I run my back tires at 80 most of the time and never had a problem stopping on a wet road. I run my front's at 70 (my tire man recommends 80 for the front because the weight of the engine). I just had Discount tire put 4 new tires on. And yes I'm going to check the pressures. They said they put 70 psi all around so I'm going to add 10 to the back.

 

[Cummins12V98]

The TPM in the wheel is far more accurate than most pressure gauges. Not sure why you don't think it is unless you don't have the premium system that displays the actual pressure on the cluster. They are accurate to .1 psi with the scan tool.

On my Dually they are spot on with my QUALITY pressure gauge.

 

[Cummins12V98]

I run my back tires at 80 most of the time and never had a problem stopping on a wet road. I run my front's at 70 (my tire man recommends 80 for the front because the weight of the engine). I just had Discount tire put 4 new tires on. And yes I'm going to check the pressures. They said they put 70 psi all around so I'm going to add 10 to the back.

Are you towing heavy ALL the time? What truck are you talking about?

45 psi for any 2500/3500 SRW is plenty of air for an unloaded truck. You guys running around with 70-80 in the rear are wearing your tires out way too soon. My 98 I would run 72 front and 45 rear. I would easily get 100K+ out of Michelins or BFG's.

 

[Jim W]

The TPM in the wheel is far more accurate than most pressure gauges. Not sure why you don't think it is unless you don't have the premium system that displays the actual pressure on the cluster. They are accurate to .1 psi with the scan tool.

Sag2; My truck was built in Sept 07 and I bought the truck new in Nov 07. So I do not think that this is the premium system at all. My system is just a dumb idiot light and a single ding if the light come on no air pressure readings at all are displayed.

Jim W.

 

[sag2]

Sag2; My truck was built in Sept 07 and I bought the truck new in Nov 07. So I do not think that this is the premium system at all. My system is just a dumb idiot light and a single ding if the light come on no air pressure readings at all are displayed.

Jim W.

OK, that explains your frustration. The premium systems are much better.

 

[TFucili]

My TPMS alerted today as the right rear reached the bottom threshold(65?). I had to go all the way to 80 to get it to reset and then air down to just above the threshold. The EVIC indicated pressures were spot-on with my Mac Tools pressure gauge, by the way.

 

[Regcabguy]

This system must have come out of Europe. The libs love anything from across the pond.
No issues with an unladen truck with 80 psi E-rated tires continually going airborne in California and losing contact briefly with the concrete with the freeway expansion joints?
Maybe a disclaimer at sales time would enable a common sense reflash?
I have to concede the TPMS system in our Honda alerted me to a low tire that might have gone flat on the freeway.
Maybe a grossly low tire alert would be a compromise on the light trucks.

 

[AlFischer]

I don't understand your crack about "the libs". If your referring to me you are 180 out! I LIKE some European things and hate others. I also HATE this TPMS. If I had been aware of it lousy restriction I would not have bought the RAM.

As it is it will never alert me to a low tire because I am now conditioned to IGNORE IT! The 13 had a switch that allowed for reasonable uladened pressure. The service manual states that the truck has one. RAM has screwed us!

 

[photowrite]

I hate TPMS on my truck it is never correct since I air the tires per the tire manufactures inflation tables for a given load. In fact the last set of tires and rims I just purchase to run this summer do not have the sensors in them. It is a crutch for lazy people who think the tire is being monitored for them all of the time regardless of tire wear.

Jim W.

Agreed. Inflation table psi based on the weight on the axles is my method for all light-trucks, especially when lightly-loaded.

 

[TFucili]

Response from AEV:
Thank you for contacting AEV. We do have a Procal developed for Ram trucks, but it will be quite different than the JK Procal because it will not serve quite as many purposes by nature. We are aware of the high PSI threshold on the Ram heavy duty trucks, and the issue is actually a little deeper than just that. The Ram Procal will not upon immediate release allow you to manage your PSI settings because the system that controls this is much more difficult to manage than it is on the JK. So difficult in fact that you cannot even take it to a Ram dealership to have it reprogrammed. Most large tires (37" 40") do not have a PSI threshold high enough to turn off the TPMS light, as most tires suitable for a Ram have about a 50 PSI max, where the TPMS light will come on at 64 PSI. On our in house built turnkey models, the light will be turned off, but we haven't yet found a good way to transmit this feature to the Procal that will be for sale. The Ram product release is today, so keep any eye out on the website for product information.