Low speed loaded test of 3.42....

[Cummins12V98]

Good to hear. I know it won't be an issue, but I know for sure I will notice and will miss how the truck drove on a stock platform, i.e. acceleration, rpms at speeds, and towing.

 

[Cummins12V98]

Again, a 4:10 truck will out accelerate and pull a larger load than a 3:42. Flat and steady towing isn’t a real world luxury many people get to experience. So yes, in the world of towing, it does matter. Hence the appropriate tow ratings for differently geared trucks. ...as stated before...

Facts are facts. Just because it works for you, and I’m not saying or arguing that it doesn’t, doesn’t mean it’s not true. Basically your “butt meter” or “happiness factor” doesn’t mean virtually all manufacturers and engineers with all these designed tests and specs are completely wrong.

BTW, I get your logic and reasoning for choosing your rig, I’m in no way condemning your choice or saying you made a mistake. I’m glad it works out well for you. Sometimes I wonder if I should’ve done the same. But at the end of the day, I’m willing to pay for the slight mileage loss for my gearing choice compared to the higher ratio. I don’t use it for a ton of miles and I’d prefer the power and performance when needed the 4:10s provide.

Good Post!

I truly LOVE my truck, so much so that I have decided to keep it for now as I was planning to buy a 20 but they so far don't give me the warm and fuzzy.

I didn't buy the truck for mileage that's for sure. I bought it to do a specific job and it does so extremely well towing up to 35k combined when double towing.

 

[kthaxton]

My horse is up on all four running around just fine! 65K in 4.5 years. Has towed heavy, been in very strong winds towing heavy, has had recalls and a code once that never came back after the SCR recall. Loves to stretch her legs out on the open road. I said "her" as truck was named Cherry for the deep cherry crystal color.

...and I am making no argument against any of that, only the things that..... well, the things that are in my replies.

 

[Cummins12V98]

Regarding component wear. I think I am the only one that can show for 65k use there was very little wear, towing well over 1/2 the miles at 29k combined with 68RFE and 3.42's.

Trans fluid had at least 50k, same with the rear Diff. I did NOT pour off the trans pan I simply removed the drain plug.

 

[dieselshadow]

@cerberusiam

I enjoy good conversations and learning from other folks. I don’t mind having my mistakes pointed out to me either. But I have learned there are lots of others who don’t follow the same program.

Judging by your tone of your responses, I’m guessing you’d rather not continue this conversation, and I’m ok with that. I can point out some flaws in your theory, but I don’t want to start an argument or a “I’m right, you’re wrong” thing.

I’d like this to stay respectful in both directions to all parties. Written word can so easily be taken out of context and I could easily be misinterpreting yours or you mine. This happens all the time in forums.

 

[Cummins12V98]

I would still like to know what the HELLZ a “Super Moderator” is ???

 

[seafish]

In short, a member who can ban you but can't be banned themselves. LOL

 

[dieselshadow]

I would still like to know what the HELLZ a “Super Moderator” is ???

Its just a title that means he has the responsibility/capabilities to moderate the entire forum, not just a single forum. It’s part of the software. A regular moderator (as in titles) for Xenforo, the software TDR uses, means he would be restricted to a certain forum or set of subforums.

 

[Cummins12V98]

Its just a title that means he has the responsibility/capabilities to moderate the entire forum, not just a single forum. It’s part of the software. A regular moderator (as in titles) for Xenforo, the software TDR uses, means he would be restricted to a certain forum or set of subforums.

Thanks guys, not impressed.

 

[SnoKing]

Ford is moving to taller gears with the new 10 speed:
First 4.615:1
Second 2.919:1
Third 2.132:1
Fourth 1.773:1
Fifth 1.519:1
Sixth 1.277:1
Seventh 1:01
Eighth 0.851:1
Ninth 0.687:1
10th 0.632:1
Reverse -4.695:1

SRW get 3.31 or 3.55 diffs F350 4x4 with either gear have the same 5th wheel tow rating of 22,000. Now the question is how do you tow a 22K 5th wheel with 4400-5500 lbs of pin weight. These new tow ratings for SRW trucks make little sense. Strange thing is Ford list 275/65R18E rated to 3415 and 275/65R20E rated to 3750. So the trucks with 18" wheels must have a RGAWR under 7K.

 

[Wiredawg]

Ford is moving to taller gears with the new 10 speed:
First 4.615:1
Second 2.919:1
Third 2.132:1
Fourth 1.773:1
Fifth 1.519:1
Sixth 1.277:1
Seventh 1:01
Eighth 0.851:1
Ninth 0.687:1
10th 0.632:1
Reverse -4.695:1

SRW get 3.31 or 3.55 diffs F350 4x4 with either gear have the same 5th wheel tow rating of 22,000. Now the question is how do you tow a 22K 5th wheel with 4400-5500 lbs of pin weight. These new tow ratings for SRW trucks make little sense. Strange thing is Ford list 275/65R18E rated to 3415 and 275/65R20E rated to 3750. So the trucks with 18" wheels must have a RGAWR under 7K.

Sno, I think you could tow 22KLbs with a triple axle trailer. Prior to my current DRV, my two previous 5ers were triple axle and had approx 3400 lb pin weights. You're right tho about heavy two axle trailers.

Cheers, Ron

 

[AH64ID]

Ford is moving to taller gears with the new 10 speed:
First 4.615:1
Second 2.919:1
Third 2.132:1
Fourth 1.773:1
Fifth 1.519:1
Sixth 1.277:1
Seventh 1:01
Eighth 0.851:1
Ninth 0.687:1
10th 0.632:1
Reverse -4.695:1

SRW get 3.31 or 3.55 diffs F350 4x4 with either gear have the same 5th wheel tow rating of 22,000. Now the question is how do you tow a 22K 5th wheel with 4400-5500 lbs of pin weight. These new tow ratings for SRW trucks make little sense. Strange thing is Ford list 275/65R18E rated to 3415 and 275/65R20E rated to 3750. So the trucks with 18" wheels must have a RGAWR under 7K.

I have to admit I really like those ratios. Great low speed and highway speed ratios. Not sure what it will actually gain in the real world, but it looks good on paper.

I was very surprised they didn’t make an OD ratio that allows for a lower geared rear end to take some stress off the trans, but maybe getting into the extreme OD ratios below .6 puts too much stress on the trans. After all a 3.55 will have a bigger pinion than a 4.10, and that could be part of the engineering decision.

My brothers F-250 had 275/65R18’s stock so I’ll ask him what his RAWR is. He did say that most other trucks have 275/70R18’s not the base 65 series. I wonder if it’s like Ram still offering 17’s on 2500’s.

I also have to say.. RGAWR isn’t a thing. It’s RAWR. You aren’t grossing anything on a rear axle. Just like it’s not GCVWR, since you’re aren’t grossing anything on the vehicle. All ratings have a 4 letter acronym, not 5. Sorry pet peeve of mine. RGAWR and GCVWR, etc, make my skin crawl.

 

[Cummins12V98]

Ford is moving to taller gears with the new 10 speed:
First 4.615:1
Second 2.919:1
Third 2.132:1
Fourth 1.773:1
Fifth 1.519:1
Sixth 1.277:1
Seventh 1:01
Eighth 0.851:1
Ninth 0.687:1
10th 0.632:1
Reverse -4.695:1

SRW get 3.31 or 3.55 diffs F350 4x4 with either gear have the same 5th wheel tow rating of 22,000. Now the question is how do you tow a 22K 5th wheel with 4400-5500 lbs of pin weight. These new tow ratings for SRW trucks make little sense. Strange thing is Ford list 275/65R18E rated to 3415 and 275/65R20E rated to 3750. So the trucks with 18" wheels must have a RGAWR under 7K.

Easy with a triple axle 5er running 15% pin weight.

 

[CUMMINZ]

Is the 11.8 R & P only in the 4.10?

I have the 11.8" in my 4.30s on my 07.5

 

[CUMMINZ]

It doesn't matter whether it is AT speed or getting TO speed, final drive ratio does not take into account the extra load imposed by the lower numerical ratios. It doesn't matter whether it is steady state or accelerating the effort required remains the same in each state and the diff ratio will effect that more than anything else. It will take more effort to roll a given load at a given speed with 3.42's than it will with 4.10's. All things being equal, that can be documented by engine load.



Anecdotal and lacking any basis for comparison does not convince anyone that knows better. The only thing you have offered is butt meter impressions and that are never accurate. We all know this as matter of fact. It is still just an uninformed opinion, you are welcome to it, still doesn't validate anything.



AISIN has nothing to do with it, nothing. The whole statement is refuted by simple physics and quantifiable measures whether you like it or not. It is still just an opinion based on your experience in a very narrow usage scenario.

From inception these trucks have NEVER needed higher gearing for better performance, they have consistently lacked enough gears to use the more effective lower gearing to achieve the potential performance. It is just silly to argue that 5 gears are more effective than 6 in any reasonable scenario, ludicrous when comparing 3.42's to 4.10's. It simply will pass any kind of logic test.



Not a wrench at all, it is simply ignored because most people simply do not get the relationships that matter. A 35" tire is bordering on too much height with 4.10's and max loads. At that point 4.30's are a better fit for efficacy, 4.10's for economy. Ends being a tweener that requires choices.

I love my 4.30s with my 245x19.5s. I run 2,000rpms at 70mph.

 

[Cummins12V98]

I love my 4.30s with my 245x19.5s. I run 2,000rpms at 70mph.

Same as my 4.10’s at 70.