2014 2500 tire pressure question

[Powder Extreme]

Okay, I have searched and can't seem to find any definitive answers.

Let's start by saying I'm only interested in your truck if it is SPECIFICALLY a 2014 2500, the system is set up differently for this model than previous years or the one tons.

So the question, has anybody with a 2014 2500 figured out how to run less than 75lbs of air pressure in the tires? Especially the rear tires? I would like to run the fronts about 65 and the rears about 50 but can't stand having to change the EVIC back to what I want it at every time because it says air the tires up to 80. Not to mention the low tire light is annoying and won't do me a damn bit of good if I actually DO have a low tire due to a nail or something since it is ALWAYS lit.

 

[Powder Extreme]

Anyone? Anyone? Bueller? Bueller?

 

[LocoPilot750]

My problem exactly. The rear coil springs are supposed to give a better ride, but how can you tell with 80psi in an empty truck? Still rides like a rodeo bull. It's like solid rubber or wooden tires. I bled my rears down to 65, and the red indicators came on telling me to pump them up to 80. I did that and got the reds to go out, and bled them down to 70 and that worked until it cooled off, and the psi fell below 70, and it turned the light back on. This is common with the '14 2500's, and the dealer or service dept can't do much about it. Plenty of discussion about it on the other forum.

 

[Powder Extreme]

So 70 is the can't go below number. Wow. Like you say, the coils are nice but the tires make it harsh. On the other hand, if 80psi is a new DOT rule, can't blame Ram for it. Imagine what it would be like with leafs at 80psi!!!

Anybody know if the sensors are inside the rim or if they part of the valve stem? Makes me think about putting them inside the spare tire and leaving them. Go back to old school using a gauge on the rears.

I'm going with Kelderman full air ride at all 4 corners, will see if that makes 70 psi tolerable.

 

[RikDavis]

Doesn't the 2014 have a light load and heavy load setting like the 2013??

 

[Powder Extreme]

Nope, apparently dot in their infinite wisdom has decided to eliminate that.

 

[JLandry]

I found this information in the 2014 factory service manual. Note the low pressure ON thresholds listed at the bottom.

John L.

22 - Tires and Wheels / Tire Pressure Monitoring / Operation

OPERATION

TIRE PRESSURE MONITORING

The tire pressure monitoring system (TPMS) is designed to operate without loss of function for all OEM tire construction for this vehicle. Sensors, mounted to each road wheel as part of the valve stem, transmit an RF signal indicating their individual pressure to a receiver located in the Radio Frequency (RF) Hub.

If the TPM system detects that the tire pressure in any road tire is low, beyond the Low Pressure (lamp) ON threshold (see placard table below), the TPM system will continuously illuminate an indicator lamp. If a system fault is detected, the indicator lamp will flash on/off for 75 seconds, then remain on solid.

If the RF Hub detects a warning or fault condition at ignition key "on", the display module will request a chime once per ignition cycle for the first "warning" or "fault" condition detected. A "warning" or "fault" condition will remain enabled until the problem causing the condition is corrected and removed/reset.

The RF Hub shall continuously monitor for the receipt of tire pressure RF message transmissions from the wheel sensors during both the ignition key "on" and key "off" cycles. The wheel sensor ID’s and the location of each sensor (e.g. Tire 1, Tire 2 etc.) are stored in the RF Hub non-volatile memory during the initial Manufacturing Plant Process, or during a service procedure, as required.

The TPM System will continue to warn the driver of low tire pressure as long as the condition exists, and will not turn off the indicator lamp until the tire pressure is at or above the placard. The system will automatically update and the TPM indicator lamp will extinguish once the updated tire pressures have been received.

Tire pressure will vary with temperature by about 1 psi (6.9 kPa) for every 12°F (6.5°C). This means that when the outside temperature decreases, the tire pressure will decrease. Tire pressure should always be set based on cold inflation tire pressure (placard pressure). This is defined as the tire pressure after a vehicle has not been driven for more than 3 hours (and in outside ambient temperature). The tire pressure will also increase as the vehicle is driven; this is normal and there should be no adjustment for this increased pressure. For a system fault, the system will return to normal once the RF Hub receives a valid transmission from that sensor location.​

TPM THRESHOLD PRESSURES

The recommended "Placard Pressure" for the tires installed on the vehicle, are stored in the RF Hub non-volatile memory during the initial Manufacturing Plant Process, or during a service procedure, as required. To determine the pressure thresholds for a vehicle, refer to the Tire Inflation Pressure (Placard) Label, and then apply the placard pressure to the following table.

For further information, refer to the Owners Manual or the Appropriate Diagnostic Information.

Placard Pressure (Cold) (PSI) - Low Pressure ON Threshold (PSI)

28 - 22
29 - 23
30 - 24
31 - 25
32 - 25
33 - 26
34 - 27
35 - 28
36 - 29
37 - 29
38 - 30
39 - 31
40 - 32
41 - 33
42 - 34
43 - 35
44 - 36
45 - 36
46 - 37
47 - 38
48 - 38
49 - 39
50 - 40
51 - 41
55 - 44
60 - 48
65 - 52
70 - 56
75 - 60
80 - 64​

 

[MJWenrich]

Just thinkin' out loud here but since our vehicles are all electronic and similar, couldn't the techs reflash the computer to 3500 parameters? Of course that might put a government drone in your rear view mirror for violating DOT requirements but it might be worth it to ask. And on second thought the dealer might be precluded from doing this so you may need to appeal to the after market and it sounds like someone could have a great new business venture. What a crock of dung we have to put up with anymore. Thanks again Uncle Sugar.

Mike

 

[LocoPilot750]

My tire dealer had an idea. Dismount the tires, replace the stems and indicators with a regular stems. Take the removed indicators and put them in a short pieces of pcv capped on both ends with a hole for the stem, and pump them up to 80 psi. Zip tie then to the frame someplace near the rear tires. Then you can set your rear tire pressure to whatever you want! No idea if this would work or not, surely somebody has tried it already.