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2014 Ram 2500 TPMS


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Spent four hours in the dealership yesterday, they lowered the threshold for the rear tires to 60 psi but the ...


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Old 01-04-2015, 07:22 AM   #11 (permalink)
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Spent four hours in the dealership yesterday, they lowered the threshold for the rear tires to 60 psi but the light is still on, drove to north Florida and back last night the light is still on, tire pressure is at 65, the dealership will take it back this week and continue to work on it, will keep u posted


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Old 01-22-2015, 04:03 PM   #12 (permalink)
 
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I went through the same thing. Although the dealer can change what the dash displays, they can not change the actual threshold. No matter what the dash says, the light comes on at the same time as it does right off the lot. My dash says "inflate to 32" (front) and "inflate to 47" (rear). even with that, the light still comes on.
If I inflate the rears to 80, the light goes out and stays out until the rears hit about 64. My solution has been to keep the tires at 66, and the light stays out.

If you are running the tires at 65, do this;
Inflate to 80 in the rear and 65 in the front. Drive it til the light goes out. Then lower the rears to 65 or 66 to be safe and drive. the light will stay out.
Do this at the coldest point in the day and you should be ok with temp fluctuations.


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Old 01-22-2015, 04:31 PM   #13 (permalink)
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Originally Posted by tony 340 View Post
I've been running my truck at 85, usually closer to 90lbs for close to 10 years with no problems.

If you have problems driving you should check into some winter driving classes or get yourself some better tires.

Running your tires at 85-90 when the MAX sidewall pressure is 80 on most E rated tires is retarded to begin with. Now the fact that we should truly be airing the tires in relationship to the load would tell you that 85-90 is even more retarded...

The calculation I was taught to use is:

((Load of tire)/(weight rating of tire))x Max load tire pressure.

For example:

Lets say there is 4,000 pounds on the front axle. divide this by two, for the two tires on that axle... you get 2,000 pounds. we will also say the tires max load is the typical 3,185.

so: 2000/3185= .6279

We will take the .6279 x the normal 80 psi max tire pressure. to get 50 PSI

The curb weight of my 2015 ram 2500 6.4 hemi crew cab short box is 3800 pounds. So quite truthfully I should be running in the neighborhood of 50 psi...

The fact that you want to run 85-90 is your prerogative... You feel free to drive around with a much stiffer ride, prematurely ruin your tires and lose a lot of traction due to less road surface contact... I will continue my route...

Telling some one they need to take winter driving classes is just asinine and not needed within the forum...
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Old 02-05-2015, 04:19 PM   #14 (permalink)
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I have good news. I received a couple of re-call notices and took my 2014 2500 in, and it fixed the tpms problem. I am running 46 lbs. in my rear tires and I have no alarm or light on. I haven't put 80 lbs in them yet and maybe it will set the light off again. I don't care. I run empty more than loaded so I can deal with the light on when I pull a load once in a while.
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Old 02-05-2015, 05:06 PM   #15 (permalink)
 
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I haven't received any recall notices.
Were the recalls for the TPMS?
I'm interested.
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Old 02-05-2015, 06:19 PM   #16 (permalink)
 
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Originally Posted by avolnek View Post
Running your tires at 85-90 when the MAX sidewall pressure is 80 on most E rated tires is retarded to begin with. Now the fact that we should truly be airing the tires in relationship to the load would tell you that 85-90 is even more retarded...

The calculation I was taught to use is:

((Load of tire)/(weight rating of tire))x Max load tire pressure.

For example:

Lets say there is 4,000 pounds on the front axle. divide this by two, for the two tires on that axle... you get 2,000 pounds. we will also say the tires max load is the typical 3,185.

so: 2000/3185= .6279

We will take the .6279 x the normal 80 psi max tire pressure. to get 50 PSI

The curb weight of my 2015 ram 2500 6.4 hemi crew cab short box is 3800 pounds. So quite truthfully I should be running in the neighborhood of 50 psi...

The fact that you want to run 85-90 is your prerogative... You feel free to drive around with a much stiffer ride, prematurely ruin your tires and lose a lot of traction due to less road surface contact... I will continue my route...

Telling some one they need to take winter driving classes is just asinine and not needed within the forum...
Your truck weighs wayy more than 3800# bro..typo maybe? My truck weighs almost 6600# and i have a regular cab 6.4 2500.

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Old 02-15-2015, 12:21 AM   #17 (permalink)
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Originally Posted by kdhawk200 View Post
I have good news. I received a couple of re-call notices and took my 2014 2500 in, and it fixed the tpms problem. I am running 46 lbs. in my rear tires and I have no alarm or light on. I haven't put 80 lbs in them yet and maybe it will set the light off again. I don't care. I run empty more than loaded so I can deal with the light on when I pull a load once in a while.
Can you post the recall number or codes?


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Old 04-09-2015, 05:28 PM   #18 (permalink)
 
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Originally Posted by kdhawk200 View Post
I have good news. I received a couple of re-call notices and took my 2014 2500 in, and it fixed the tpms problem. I am running 46 lbs. in my rear tires and I have no alarm or light on. I haven't put 80 lbs in them yet and maybe it will set the light off again. I don't care. I run empty more than loaded so I can deal with the light on when I pull a load once in a while.
What recall was this? I need to get that annoying light to go out


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Old 04-09-2015, 08:00 PM   #19 (permalink)
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Originally Posted by avolnek View Post
Running your tires at 85-90 when the MAX sidewall pressure is 80 on most E rated tires is retarded to begin with. Now the fact that we should truly be airing the tires in relationship to the load would tell you that 85-90 is even more retarded...

The calculation I was taught to use is:

((Load of tire)/(weight rating of tire))x Max load tire pressure.

For example:

Lets say there is 4,000 pounds on the front axle. divide this by two, for the two tires on that axle... you get 2,000 pounds. we will also say the tires max load is the typical 3,185.

so: 2000/3185= .6279

We will take the .6279 x the normal 80 psi max tire pressure. to get 50 PSI

The curb weight of my 2015 ram 2500 6.4 hemi crew cab short box is 3800 pounds. So quite truthfully I should be running in the neighborhood of 50 psi...

The fact that you want to run 85-90 is your prerogative... You feel free to drive around with a much stiffer ride, prematurely ruin your tires and lose a lot of traction due to less road surface contact... I will continue my route...

Telling some one they need to take winter driving classes is just asinine and not needed within the forum...
I agree whole heartedly that running 90psi is insanity. Especially if it at 90 cold, that tire could hit well over 100pi hot and that'd WAY over and 10ply E rated spe.spec.

However, the problem I see with your method is that only calculates static load. Roll into a corner hard and the 2000lb static load could transfer to 2900 on the outside tire and 1100 on the inside. Now you're tire is underinflated for it's current load.

We typically reccomend 65-75lbs to our customers who run LT tires, depending on their needs. Because we all know "that guy" who drives a CCLB 2500 with LTs and the heaviest thing he hauls is his wife. He runs 65. Haha


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Old 04-09-2015, 09:37 PM   #20 (permalink)
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Sure would like to know the recall number. I will hopefully get through the summer with the Firestones but doubt I will see much over 20k for total mileage on them. They have been rotated 3 or 4 times to this point, about 17k, and looks like about 6/32 tread left. Will go to Michelin with the 70k warranty for next set but sure would like to set the rears at 65 when not towing.
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