G56 Gearing Wrong, Do I smell a recall?

[CUMMINZ]

My 2100 is with Auto and 4.10s.

My 2100 is with Auto and 4. 10s. Factory tires.

 

[RustyJC]

My 2100 is with Auto and 4. 10s. Factory tires.

Oh, I missed that since the thread was about the gearing of the G56. Shoulda read your signature, I guess. Sorry!!



Rusty

 

[JFaulkner]

My Honda Accord dosn't tow my trailer for crap. I wonder if Honda is going to do a recall on it? Duh !!!

My Prelude towed my Waverunner just fine, just burned gas like crazy. Guess I should have called for a goverment investigation as to why my fuel milage was so horrible, and made honda change the gearing huh?



If you can't afford the fuel, sell the truck. Or even better yet, sell the camper. With the money you get from it you could pay the extra cost for the fuel your "Gears" burn.

 

[PHeadings]

My Prelude towed my Waverunner just fine, just burned gas like crazy. Guess I should have called for a goverment investigation as to why my fuel milage was so horrible, and made honda change the gearing huh?



If you can't afford the fuel, sell the truck. Or even better yet, sell the camper. With the money you get from it you could pay the extra cost for the fuel your "Gears" burn.

It always amazes me how these thread get off the subject.

 

[PHeadings]

My 2100 is with Auto and 4. 10s. Factory tires.

The answer is 2200 RPM @ 70MPH 3. 73 with stock tires on a G56.



Thats even higher than your 48RE with 4. 10 gears, (scratch, scratch)



Now if you have owned a older Dodge and bought a new 2006 with what you thought was 3. 73 gears you would be very disapointed.



Very misleading!

 

[Buffalo]

The 2100+ rpm recommendation is interesting. At May Madness, the head engineer in charge of building our engine said that the "Sweet Spot" for fuel efficiency was in the 1800-1900 rpm range.



I, also, recall hearing that the plant that produced the NV-5600 was shut down & the machines used in the production of the NV-5600 were sold. I suppose it's possible that they could purchase new machinery & re-open the plant.



Joe F. (Buffalo)

 

[TowPro]

The answer is 2200 RPM @ 70MPH 3. 73 with stock tires on a G56.



Thats even higher than your 48RE with 4. 10 gears, (scratch, scratch)



Now if you have owned a older Dodge and bought a new 2006 with what you thought was 3. 73 gears you would be very disapointed.



Very misleading!

I am trading my 02 3500 dually with 4:10 47re stock tires. My 06 with G56 3:73 and stock tires works out to the exact RPM I am see now (using Klengers graphs) Sure I would have ordered the 3:45's if they made them, but I will not be disappointed because I knew about this before I ordered it.

 

[CUMMINZ]

I ordered my 2004. 5 48re with 4. 10s. My 2006 has 4. 10s and I would have nothing else.

My 2004. 5 has 315s and ran 1950-2000rpms at 70mph.





CUMMINZ

 

[4 wheelssmoking]

Remember that the trucks we have are intended for work. A diesel engine is normally a torque rise engine. You should cruise above peak torque and as the rpms drop under load, the fat part of the curve wil keep the engine from lugging. Best economy will be had with this technique. [this is noticed more if you are loaded heavily]

 

[klenger]

The 2100+ rpm recommendation is interesting. At May Madness, the head engineer in charge of building our engine said that the "Sweet Spot" for fuel efficiency was in the 1800-1900 rpm range.

Joe F. (Buffalo)

If the geared the truck for max fuel efficiency, there would be no RPMs left when you are towing heavy. Remember, these are trucks designed to move heavy loads. I'm in the avionics business, and one of the terms that is very important to our products is "intended function". Using a HD pickup truck to drive 85 MPH on the freeway empty and expect good milage is not it's "intended function".

 

[RustyJC]

Remember that the trucks we have are intended for work. A diesel engine is normally a torque rise engine. You should cruise above peak torque and as the rpms drop under load, the fat part of the curve wil keep the engine from lugging. Best economy will be had with this technique. [this is noticed more if you are loaded heavily]

Bingo!! Oo.



This is why my truck that turns 2350 RPM at 70 MPH can pull our heavy 5th wheel up 6% grades in 6th gear. As the RPM tries to drop, torque is increasing as the engine rides up the back side of the torque curve.



Rusty

 

[KB0OU]

Hey,

If 1800 rpm is good for fuel effeciency, why not drive that speed, duh!!

Slow down and enjoy the ride, 65 mph is not going to kill you.

 

[SThorud]

This has to be one of the most ridiculous statements I have ever seen... A recall because they geared the truck shorter than before.



A difference of about 150 rpm in 6th between the NV5600 and G56 means about as much difference in fuel economy as having a bug shield or not.

 

[2broke2smoke]

couldn't agree more ...

 

[PHeadings]

I am trading my 02 3500 dually with 4:10 47re stock tires. My 06 with G56 3:73 and stock tires works out to the exact RPM I am see now (using Klengers graphs) Sure I would have ordered the 3:45's if they made them, but I will not be disappointed because I knew about this before I ordered it.

Sounds like you alread ordered a 2006. And why may I ask did you go with 3. 73 gears if you say you were happy with your 4. 10 gears you had in your 2002?



You are a prime example of what i am talking about.



Now that you have seen the chart you say that you would even opp for the 3. 42 gears if they offered them.

 

[bighornram]

This has to be one of the most ridiculous statements I have ever seen... A recall because they geared the truck shorter than before.



A difference of about 150 rpm in 6th between the NV5600 and G56 means about as much difference in fuel economy as having a bug shield or not.

I don't see the problem either.



The biggest problem I had going from my 02' to my 05' was training my ears. I run 65 mph at about 21-2200 where the 02' ran about 1900. I see no appreciable difference in mpg though.

 

[PHeadings]

This has to be one of the most ridiculous statements I have ever seen... A recall because they geared the truck shorter than before.



A difference of about 150 rpm in 6th between the NV5600 and G56 means about as much difference in fuel economy as having a bug shield or not.

Wow, This is all you have? Did you even go to high school?



NV5600 3. 73 to G56 4. 10 is 400RPM difference



NV5600 3. 73 to G56 3. 73 is 200RPM difference



A bug shield that scrubs 150RPM priceless!

 

[TowPro]

Sounds like you alread ordered a 2006. And why may I ask did you go with 3. 73 gears if you say you were happy with your 4. 10 gears you had in your 2002?



You are a prime example of what i am talking about.



Now that you have seen the chart you say that you would even opp for the 3. 42 gears if they offered them.

I was just pointing out that an 06 with G56 and 3:73 Single rear wheel truck has the same affective gear ratio as my 02 with 47re and 4:10 dual rear wheel truck. both are doing 65mph@2000 rpm (+-1mph)



I used to have a 98 2500, 5 speed, 3:55's and towed the same weight without problems, but it was doing 68mph@2000rpm.



If I "could" get the 3:42's I would have picked them, but you can't get anything except 3:73's with the G56 and I don't want an auto.

 

[klenger]

TowPro: Your comments made perfect sense to me. You researched, you decided, you purchased, you happy

 

[Cummins Cowboy]

Dodge would never tell us, but my bets are that the 3:45's could not pass emissions for highway speeds. They do check emissions for highway speeds, remember the recall on the 98'5's where they reflashed the ECM for emissions over 55mph? (and everybody's MPG went down)

Both Cummins and Dodge got sued by the EPA over that one.

If this is the case how does the 3:73 48re combo pass emissions at highway speeds