Community Forums

jjackrash · 07-25-2019, 09:16 PM

Quote:

Originally Posted by diginomad

250 F is WAY too high for transmission fluid. You want it at ~180 F. Engine oil at that temperature could be fine (using synthetic oil), but that tranny of yours will live a much shorter life. Change the trans fluid, it is toast.

I am not sure if you really meant me. My tranny temp usually loafs along at around 140F (in both my 2013 and 2016; I have not pulled a big hill yet with my 2019). The highest I have ever seen my tranny temp was a hair over 180 pulling 14k over a pass in 100F heat in my 2016. I have never seen 200F, let alone 250F, in any of my Duramax-powered trucks.

Mtn. Lion · 07-25-2019, 09:41 PM

Quote:

Originally Posted by mrgrayaz

Yeah old news though ..the 6R140 runs at like 230F now towing normally... About 205F around town. Only time will tell if Ford made a good decision switching to the high temp coolant loop there lol.

Interesting. What fluid does it use?

onechaddude · 07-26-2019, 04:14 AM

Quote:

Originally Posted by jjackrash

I am not sure if you really meant me. My tranny temp usually loafs along at around 140F (in both my 2013 and 2016; I have not pulled a big hill yet with my 2019). The highest I have ever seen my tranny temp was a hair over 180 pulling 14k over a pass in 100F heat in my 2016. I have never seen 200F, let alone 250F, in any of my Duramax-powered trucks.

In my 2016 Duramax, like you, my trans fluid stayed in the 140-150 df range. On my 2018 Duramax the trans runs 180-190 df around town empty or pulling in the summer. If really loaded it will creep to around 200df. I figured GM finally realized the trans is much more efficient with warmer fluid than what the 2016 ran at.

Chad

mrgrayaz · 07-26-2019, 08:51 PM

Quote:

Originally Posted by diginomad

Interesting. What fluid does it use?

No idea. Was holding at about 210F today at 23000 GCWR doing 75mph - flat.

I just got a picture of a new Chevrolet 3500 Diesel's sticker from reddit. Heavy beasts. Much heavier then my Ford

3800lbs payload isn't bad but man that Curb weight is up there. Nearly 8300lbs...my Ford is less then that with me, DW, dog + hitch....

Jshopes81 · 07-26-2019, 09:36 PM

Gcwr is such a load of crap. Theyve gone from grossly under to stupid over. I scaled the work dodge at 27 which is about what its rated for and maxed on rear axle rating. I will not be doing that again. The work dodge doesnt even like low 20s gross because of the gearing.

jjackrash · 07-26-2019, 10:58 PM

It is interesting the gooseneck max tongue weight is 700 lbs. lower than max payload.

tuffr2 · 07-28-2019, 10:22 AM

I like the new weight sticker with the J2807 information. That is big improvement in information backed by SAE testing.

Does anyone know if Ram and Ford will follow the GM lead with posting the SAE J2807 information on the truck sticker?

I agree, that is a very heavy SRW truck.
Probably the gooseneck weight being less than max payload is probably due to SAE fine tuning of weights.

All in all, I am still very impressed. A 3,800lb. cargo capacity is nothing to sneeze at.

Thanks for posting that truck sticker information.

NevadaNick · 07-28-2019, 01:41 PM

The gooseneck load is concentrated in one place, with general cargo you could put more weight forward.

tuffr2 · 07-28-2019, 02:08 PM

Nevada - But the "E" rated tires can carry more weight than what the frame is rated for you think?

tuffr2 · 07-28-2019, 06:28 PM

I keep looking at that pic and keep thinking that number 109 fastener needs to be tightened.

Demiles · 07-29-2019, 03:11 AM

Quote:

Originally Posted by jjackrash

It is interesting the gooseneck max tongue weight is 700 lbs. lower than max payload.

It’s about time manufacturers started listing maximum pin weight and people stopped thinking that it’s only limited by the payload. GMC and Nissan is the only ones that have listed it in the past years.

tuffr2 · 07-29-2019, 05:13 AM

Agree, there is always a battle between using GVWR or Cargo Capacity, rear axle capacity, or tire capacity. I am thinking these numbers should help these types of forum discussions.

Nissan also had these labels?

mrgrayaz · 07-29-2019, 08:24 AM

Quote:

Originally Posted by Demiles

It’s about time manufacturers started listing maximum pin weight and people stopped thinking that it’s only limited by the payload. GMC and Nissan is the only ones that have listed it in the past years.

Your going to have to walk me through this, since it's so obvious to you. If the available payload sticker on the truck is lower then the available RAW left on the RAWR....and a gooseneck/5th puts all of its weight right on the Rear Axle - why would the pin rating be less?

I get that in some cases the front axle is needed to help carry the GVWR, certainly the case in many vehicles- but that's not the case in today's HD pickups. They always run out of GVWR before RAWR AFAIK.

tuffr2 · 07-29-2019, 09:01 AM

SAE J2807 probably needs to explain it. It makes sense to me since there are a lot of components involved. More than rear axle and tire ratings.

I do hope this will help eliminate the multiple schools of thought as to how much a truck can haul/tow as all the numbers are right there printed on the door jam lable.

When I had a dually truck and 5th wheel the cargo capacity of the truck was 4,600 lbs. It never seemed right that I thought all that could be pin weight. Now it is spelled out and and all you need to do is read.