3.42 gears

[Powder Extreme]

There is no causal relationship between rear end ratio and clutch / DMF failures. There is such relationship between horsepower / torque and the DMF / clutch failing.

Thank you, the Clutch is not affected by what's behind it, it's affected by what's in front of it.

 

[WMonroe]

My dad and i have just about identical trucks, his is a 6. 7 w/ 3. 42 gears and mine is the 5. 9 w/3. 73. Other than that they are exactly the same even down to the tires. I have pulled the exact same load, about 11,400 tractor and trailer, (a tractor he owns) with both trucks many times and I would take the 3. 42's every time. I believe it is because the higher rear gears allow you to use the engine and transmission better. On the highway running 65 mph I have to be in 6th gear or the engine is screaming, but he can run 5th right around 22-2300 rpm or be in 6th at about 1700. If I need to downshift out of 6thon the highway I need to slow down to 55mph where he can just downshift and maintain 65-70 mph in 5th gear.

Not trying to start a war here, just giving my opinion after putting a lot of towing miles with both gear sets in question.

 

[HBarlow]

Thank you, the Clutch is not affected by what's behind it, it's affected by what's in front of it.

If that is true try always starting a load moving in third gear of a manual six speed for a year and see how your clutch holds up. Or even second gear.

Why do you think it is acceptable to start off in second gear when unloaded but not when towing?

The additional torque multiplication or advantage provided by lower (higher numerical) gearing makes load starting easier and saves strain on the driveline.

Why do you think Dodge sets a much higher maximum gross combined weight rating for trucks with 4. 10 gears as opposed to 3. 73 or 3. 42 gearing? See Gary Owen's post above.

 

[Powder Extreme]

Harvey, I have determined that you, sir, just like to argue. Our statements that the HP in front of the clutch is much more key to the longevity of the clutch than the gear ratio of the rear end behind it still ring true. Making foolish statements such as "take off loaded in third gear" doesn't really even make sense. OBVIOUSLY slipping the clutch by taking off in 3rd gear will reduce the longevity... You don't even own a 4th gen, why don't you go troll another forum... .

 

[67guzzler]

If that is true try always starting a load moving in third gear of a manual six speed for a year and see how your clutch holds up. Or even second gear.



Why do you think it is acceptable to start off in second gear when unloaded but not when towing?



The additional torque multiplication or advantage provided by lower (higher numerical) gearing makes load starting easier and saves strain on the driveline.



Why do you think Dodge sets a much higher maximum gross combined weight rating for trucks with 4. 10 gears as opposed to 3. 73 or 3. 42 gearing? See Gary Owen's post above.

None of which proves the CLUTCH will suffer. You are just wrong.

 

[AABEN]

Well I have a 3. 73 and my weight when loaded with the trailer is 23. 000Ib and I run west and south and have not had any trouble. I have not added any extra HP you can see whit I have by looking at the botton. If I was buying a new truck to day it would be the auto They are the best auto on the market to day !!== good luck ==

 

[CUMMINZ]

The photo below is an example of where I have backed my rig into for 4 years. When I had my 06 dually with 4. 10 and 48re I had to place it into 4x4 low to keep from screaming the transmission. With the 07. 5 with 4. 10 and 68rfe I can now simply tap the pedal to ease into the spot. The transmission gear ratio is much better for backing. :-laf



With a 3. 42 gear and dropping down a gear to pull a grade is not the same as with a 4. 10 and a downshift. I am not being critical of the 3. 42 and it has it's place when used correctly.



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[HBarlow]

None of which proves the CLUTCH will suffer. You are just wrong.

Some guys can't be pursuaded by evidence, even when it comes from the engineers who built the truck. You are entitled to believe whatever you choose to believe. NO problem for me.

When your DMF clutch fails remember, I told you so.

 

[HBarlow]

Harvey, I have determined that you, sir, just like to argue. Our statements that the HP in front of the clutch is much more key to the longevity of the clutch than the gear ratio of the rear end behind it still ring true. Making foolish statements such as "take off loaded in third gear" doesn't really even make sense. OBVIOUSLY slipping the clutch by taking off in 3rd gear will reduce the longevity... You don't even own a 4th gen, why don't you go troll another forum... .

I will continue to "troll" wherever I damned well please and post when and what I choose to post. If you don't like it, don't read my posts.

What's the problem? You can't stand it when someone offers a different opinion and then has the audacity to back it up with practical comments that make sense?

If you understand what a clutch has to do to start a heavy load you should understand my point in suggesting the similarity between towing with higher gearing (lower numerical) and starting the load in a higher gear. Same principle applies.

 

[67guzzler]

Some guys can't be pursuaded by evidence, even when it comes from the engineers who built the truck. You are entitled to believe whatever you choose to believe. NO problem for me.

When your DMF clutch fails remember, I told you so.

This 2010 is a 68rfe. Last truck was a 2005 with a G56.

I agree with Powder. You just like to argue for the sake of arguing.

 

[HBarlow]

I'm really saddened that you feel that I am argumentive.

In the future if I post something I know to be true and you disagree and tell me I am wrong I will go away quietly and not disagree.

You have an absolute right to post whatever you please, even when you clearly don't know what you are talking about, so I'll just remain silent and let the wrong information stand and be accepted as fact by silent readers so you won't think I'm argumentive.

I want you to be happy and get your way here, of course.

 

[CUMMINZ]

Somewhere out there "Another one bites the dust". :{

 

[67guzzler]

I think the words "right" and "wrong" say it all. Much of this is opinion and when slams another's "opinion" as "wrong" it is a real buzz-kill. Just my $. 02.

 

[HBarlow]

I think the words "right" and "wrong" say it all. Much of this is opinion and when slams another's "opinion" as "wrong" it is a real buzz-kill. Just my $. 02.

None of which proves the CLUTCH will suffer. You are just wrong.

Care to explain these two quotes?

 

[67guzzler]

Just trying to speak to you in terms you seem to understand.

Otherwise, nope. I'm done. You win.