Fuel pump recall.

[06CumminsFan]

Actually 40-45 psi in the rears is just fine. 40 is 2270 per tire and 45 is 2470 per tire.

Given that a 3500 SRW weighs around 3000 on the rear axle, there is still a lot of overhead for day to day use. I ran 42 is mine empty and tires wore just fine, and ride with greatly improved. I ran 60 in the front all the time. 60 is good for 3020 so handles a 5200 front axle just fine.

 

[06CumminsFan]

Thanks for the advice and common sense suggestions my friends. I just had a new set of the Firestone A/Ts put on the other day-they set 'em at 80 rear and 65 front-pretty high so I'll take 'em down to 60 all around and get back to you.
BTW-thanks to your help the potential '19 2500 is OUTTA HERE!

 

[SnoKing]

Thanks for the advice and common sense suggestions my friends. I just had a new set of the Firestone A/Ts put on the other day-they set 'em at 80 rear and 65 front-pretty high so I'll take 'em down to 60 all around and get back to you.
BTW-thanks to your help the potential '19 2500 is OUTTA HERE!

Empty 60 psi in the rear will still give a pretty stiff ride.

Tire Size
LT275/70R18 Single Tire - the OEM 20's have similar ratings.
35 psi 2070 lbs
40 psi 2270 lbs x 2 = 4540
45 psi 2470 lbs x 2 = 4940
50 psi 2680 lbs (C) 115
55 psi 2840 lbs
60 psi 3020 lbs
65 psi 3195 lbs (D) 121
70 psi 3360 lbs
75 psi 3530 lbs
80 psi 3640 lbs (E) 125
95 psi 3970 lbs (F) 128

 

[Turbo Terry]

So my rear weights 3440. I’m running 40 psi

 

[Turbo Terry]

I’m trying to understand the chart

 

[SnoKing]

I’m trying to understand the chart

Yours is a dually with different size tires I believe, right? Empty 35 psi works good for a dually and 65 with fully loaded axle.

 

[lpennock]

Yours is a dually with different size tires I believe, right? Empty 35 psi works good for a dually and 65 with fully loaded axle.

Here is the per tire table for the rear duals. @Terry remember that total axle is 4x these numbers.

LT235/80R17/E117
1570@35
1725@40
1870@45
2040@50
2155@55
2290@60
2470@65 <- 2018 Door jam pressure
2555@70
2675@75
2835@80

 

[SnoKing]

Here is the per tire table for the rear duals. @Terry remember that total axle is 4x these numbers.

LT235/80R17/E117
1570@35
1725@40
1870@45
2040@50
2155@55
2290@60
2470@65 <- 2018 Door jam pressure
2555@70
2675@75
2835@80

So 35 PSI X 4 = 6280 so he was have 2000-2500 capactity to shop at Lowes or Homedepot.

 

[Turbo Terry]

Yes I understand more better now thanks

 

[SnoKing]

Yes I understand more better now thanks

And ride better to boot!

 

[Cummins12V98]

4x4 DRW, 80 front ALWAYS. Rear unloaded I run 30psi and still have plenty of capacity.

 

[lpennock]

4x4 DRW, 80 front ALWAYS. Rear unloaded I run 30psi and still have plenty of capacity.

The TRA tables I have don't have a rating at 30 psi which is why I typically don't recommend going below 35. I agree it is probably OK but with out table conformation I don't like to suggest it.

 

[Cummins12V98]

Sometimes you just have to use your brain God gave you! With about 160# for every 5 psi I think 1,400# capacity per tire is enough for carrying a 500# tool box and 200# hitch. My tires are wearing perfectly even doing so.

 

[Tuesdak]

Thanks for the advice and common sense suggestions my friends. I just had a new set of the Firestone A/Ts put on the other day-they set 'em at 80 rear and 65 front-pretty high so I'll take 'em down to 60 all around and get back to you.
BTW-thanks to your help the potential '19 2500 is OUTTA HERE!

Can you still return them? I put a set of Cooper AT3 on mine after the short miserable life of the Trashforce OEM tires.Night and Day difference in softer ride without the say the known softer ride of Michelin with their standard Green tire squirm feel all the time.

Even aired down the OEM tires rode like steel railroad wheels to the point of considering suspension modifications like different springs and shocks.

If you do trade look for the rear air ride. It’s a major improvement over just a leaf spring pack.

 

[06CumminsFan]

Update-great advice on the tire psi guys and sorry for sort of hijacking the fuel pump thread.
I set all of them at 60 psi and ride much improved!
I'll run all of them at 60 for a while -so far the TPMS hasn't given me any problems.
Oh and my wife agrees the ride is much improved.
Thanks again friends.

 

[SnoKing]

Update-great advice on the tire psi guys and sorry for sort of hijacking the fuel pump thread.
I set all of them at 60 psi and ride much improved!
I'll run all of them at 60 for a while -so far the TPMS hasn't given me any problems.
Oh and my wife agrees the ride is much improved.
Thanks again friends.

3500's do not have a tire pressure nanny. You can run 40 in the rear without the dash lighting up with warnings.

 

[06CumminsFan]

Ah yes! I see now the 3500s have a TPIS sensing/displaying only pressure and system faults.
Whereas the 1500 (and maybe 2500s) have the TPMS which includes the low pressure Warning.
Just hadn't read far enough in the digital version.
I need to get the old-school printed version!
Thanks SnoKing

 

[SnoKing]

Ah yes! I see now the 3500s have a TPIS sensing/displaying only pressure and system faults.
Whereas the 1500 (and maybe 2500s) have the TPMS which includes the low pressure Warning.
Just hadn't read far enough in the digital version.
I need to get the old-school printed version!
Thanks SnoKing

2500's by law have the nanny, 3500 AKA 1 tons not required.