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View Full Version : Who else hates the new 6speed manual ?


hauliday
01-19-2007, 08:47 PM
I quess i must have been asleep a the wheel when i bought this 07 3500 drw i didnt think that trans would have made that much difference but with almost 4k miles my fuel mileage just plain sucks on a 500 mile trip the other day it got 12.5 my 04 doing the would average 16 plus but i believe its in the trans gearing. i just looking for some answers why would DC make such a change that effects fuel mileage in such a way if i wanted that kind of mileage i would have bought a ford!!!

northernwheeler
01-19-2007, 09:49 PM
Wish it was a seven speed. Guess I just need some taller tires.[duhhh]

ramtd02
01-19-2007, 09:57 PM
either that or slow down....LOL.

I get 19-22 consistently with my hand shaker @ 65 mph. Summer LSD

With the smarty and 35's on WINTER ULSD, I am getting 21-22.

I get 750-850 miles/tank. And have seen as high as 890's.

MikesB12
01-19-2007, 11:07 PM
My '07 MC 4x4 w/3.73's is averaging 17.3 with only 1100 miles on the clock. I've been driving between 60 and 70 mph.

Diesel Avenger
01-19-2007, 11:31 PM
My 07 isn't doing that badly. Around 15-16.5 because I get after it a good bit.[roll] I have a 3500 4x4 DRW with the 3:73 rear. I am also running 2 cycle oil in the diesel. I am noticing that if you get above 2000 rpms regularly, the mpg drops like a rock. I try to stay around 65 anyway, so that helps.

Begle1
01-20-2007, 02:31 PM
Your truck isn't broken in at 4,000 miles. Most trucks don't settle into mileage until approximately 20,000 miles (or so I've been told).

erics76
01-20-2007, 02:41 PM
Whats the difference between the old 6 speed and new 6 speed?

nelrod
01-20-2007, 02:42 PM
I am opposite. I love the G-56. I do agree that it needs a 7th gear. However, when pulling with it, no slowing it down. Shifts like a car.

mikelr
01-20-2007, 02:59 PM
I find that the shifting on my G56 is a bit notchy. It tends to crunch a bit on the 4-5 shift even with a slow row with full clutch depression. It's fine though if you double clutch it.
Anyone else experience this?
It may be great compared to the old NV's but I've never drove one of those.

Hounddog
01-20-2007, 03:03 PM
How fast were you driving on that trip. My 03 got 13 or so at 70 plus with low miles( 3 or 4k ) on its first trip to a island off the S.C.coast.Now I get that towing 9 or 10k at 65/68 mph as a rule.

hauliday
01-20-2007, 03:14 PM
most of it was 70 and some 75

Danderson
01-20-2007, 04:05 PM
I'm carrying a 2000# Northstar popup on my '07. Tires have been upgraded to 285 toyo's. My GPS is only showing a 2% difference on the odometer. My overhead w/800 miles is reading 15.8 combined. Not great but pretty good considering that I'm varying the throttle pressure and I've got at least 8,000 miles to go on break-in. I've driven three NV 5600's and this tranny is a dream to shift relative to those. What's up in the air is longevity. Time will tell. I'm heading to Carli Suspensions in a few weeks for a cure for the suspension which sucks bigtime with the camper. Darn near zero travel.:(

derek.mckay
01-20-2007, 04:32 PM
either that or slow down....LOL.

I get 19-22 consistently with my hand shaker @ 65 mph. Summer LSD

With the smarty and 35's on WINTER ULSD, I am getting 21-22.

I get 750-850 miles/tank. And have seen as high as 890's.

I just HAVE to ask here...HOW in the HECK did you pull nearly 26mpg avg with 1.) a higher revving 6spd and 2.) a truck that weighs 7000lbs+...I am just SUPER cursious, because the BEST tank I have gotten was about 650ish+/-...granted, I have a gallon less on a tank than you do but I also drive almost exclusively on the highway out here in San Diego to get to the base and usually travel around 65mph.

Derek

hauliday
01-20-2007, 05:14 PM
His in km and ours is in miles

derek.mckay
01-20-2007, 05:20 PM
His in km and ours is in miles

his quote is claiming miles though

Derek

scoggins
01-20-2007, 10:34 PM
Your truck isn't broken in at 4,000 miles. Most trucks don't settle into mileage until approximately 20,000 miles (or so I've been told).

Is mine broken in @ 9050
I am getting as bad if not worse

11.3 hauling 1 horse in Sooner @ 60 MPH
11.2 hauling 0 horse in Sooner @ 75-85 MPH

not impressed same trailer on a 98.5 with 5spd and 3.55's wih 4 horses and enough crap for a 3 day show with 5 women getting 14.7 mph @ 80+

hauliday
01-20-2007, 10:51 PM
I got 9.5 to 10 with my 40' gooseneck empty and and 10.5 with my 25' gooseneck both of these are flatbeds

scoggins
01-20-2007, 11:00 PM
sux don't it

hauliday
01-20-2007, 11:11 PM
I told D.C. when they called about a survey i told them if i had known that the fuel mileage was going to be that bad i would have bought a ford

scoggins
01-20-2007, 11:21 PM
i would have searched for a 2ns gen with low miles
t
I loved my 98.5with 3.55

thinking about a double OD
probably will void the warnty though

hauliday
01-20-2007, 11:22 PM
22.5" tires might do the trick

Hounddog
01-21-2007, 03:15 AM
3.55 suck for towing anything with real weight.Been that route.

Allen Hibbs
01-21-2007, 05:53 AM
I find that the shifting on my G56 is a bit notchy. It tends to crunch a bit on the 4-5 shift even with a slow row with full clutch depression. It's fine though if you double clutch it.
Anyone else experience this?

Yes i have noticed that on mine as well. Its not enough to bother me really. Only thing that i find weird is somtimes when i am maneuvering from 2nd to reverse it will fall into reverse really easy when i want it to go into 2nd.

hauliday
01-21-2007, 06:15 AM
what really sucks is thinking your in 2nd but in reverse and a red light and trying to take off

mikelr
01-21-2007, 06:22 AM
Are you speaking from experience?

hauliday
01-21-2007, 07:48 AM
yes i am[duhhh] [duhhh] that will teach you you quick

Danderson
01-21-2007, 08:56 AM
I told D.C. when they called about a survey i told them if i had known that the fuel mileage was going to be that bad i would have bought a ford

My neighbor will gladly sell you his '03 3500 Ford 6.0. He's never gotten over 14 mpg. since new. Best mileage is achieved while sitting in the shop. On the mileage subject,someone on the "other" forum posted an announcement that AAM is going to release 3.42's soon,but that was quite a while ago.:(

Mike Holmen
01-21-2007, 10:03 AM
You guys are gonna have put more miles on your CTD. Mine fuel mile wasn't to great until I broke the 20k mark. I averaged around 14-15mpg, now I get around the 20-22mpg area. Thats so long ago I almost forget. Too bad once the motor breaks in the rest of the truck falls apart. Mine has 200k on it and the doors are starting to rust.

scoggins
01-21-2007, 10:58 AM
3.55 suck for towing anything with real weight.Been that route.

define "REAL" weight"
my last truch had 3.55's that commonly hauled 20k + with out any problems

Dodgezilla
01-21-2007, 11:15 AM
I love the trans and although my mileage isn't as good as the old 03 I traded in, I'm sure it will get better. I average 14-15 city. 16 if I don't sit in too much traffic. I just pulled my trailer around for 3 days and got around 11-12mpg depending on how hard I pushed it. I have gotten a best of almost 19mpg highway. I only have about 5500 miles on it though. I haven't seen 500 miles to a tank yet but I don't let it get below 1/4 tank before filling up. 890 miles sounds kind of crazy to me but who am I?!?!?

Hounddog
01-21-2007, 12:21 PM
Hauled 20k with no problems and 3.55 gear! Hauled it where? Across the street.I've had 3.55s it is far from a pulling gear.If any speed lost on the interstate hills it will never be regained towing 8k up unless falling off a mountain or running WFO and hope no one forces you to slow down on a big incline.I got tired of driving like a loaded low horse over the road rig.D.C. wanted the 3.55 gear gone back in 98/99 just couldn't do it then with Dana.I bought my truck to tow with.3.73s never entered my mind.If I want to drive 70 plus mph non towing I have other vehicles for that.

scoggins
01-21-2007, 01:47 PM
Horses, cattle, utility trailers, feed and minerals , cars, palm trees and many other various and sundary things from Ocachobbee, Fla; to Richmond, Va; LaFayett, LA and many places in between. Never had a problem with 3.55's and a 5 spd other tha 5th gear would not stay put until we made a jam-nnut to go on it.

J BODY
01-21-2007, 02:03 PM
My race rig is only around 8500, but I love my 3.55 gears. Kind of wanting the best of both worlds is a fine line to walk. Good mpg at highway speeds, lower rpms for better mpg at those higher speeds.....yet the power to maintain speeds with the trailer in tow and keeping it at a "happy" rpm. By the way my truck was born with 4.10's. I changed them to 3.55 within 6 mos. of buying the truck.

Hounddog
01-21-2007, 03:40 PM
The ones I had I changed from 3.55 to 4.10s.LOL 3.55s sucked towing more then then 5k any distance.Mty neighbor has 3.73 in his 05 dually.Says they were a mistake also.Its not in the engines sweet spot towing any weight unless towing above 70 mph which he does not like to do.Also on large inclines with curvy roads its eaither too fast or lugs,downshifts and engine screams.I never considered fuel mpg as a key point on my truck purchase.Towing was my key concern.My Gran Marguis gets mid 20s at 75 mph.I have never used my diesels as everday commuters.

Mike Holmen
01-21-2007, 04:53 PM
Go with the 3.55, you can alway shift down on the real steep stuff. I'm towing with only 4 gears, no wicked low first and second gears. No extra overdrive gears. 4.10's would drive me crazy, you would be shifting non stop, then just max rpm at 90mph area.

quantum610
01-21-2007, 11:20 PM
Go with the 3.55, you can alway shift down on the real steep stuff. I'm towing with only 4 gears, no wicked low first and second gears. No extra overdrive gears. 4.10's would drive me crazy, you would be shifting non stop, then just max rpm at 90mph area.


Depends on where you tow at, the nasty stuff demands 4:10 gearing. I think for most towing the higher gearing would work just fine though. Everyone has to remember these engines do not "need" to be shifted until 1600rpm. Do you understand how lazy that is compared to the alternative?

scoggins
01-22-2007, 11:55 AM
To EACH HIS OWN I reccon[tapdshut]

ridofpwrstroke
01-24-2007, 11:46 AM
I had 3.55's on my 02 but I ran 35" tires. I went to 4.10's and was much happier, but I only towed with my 02. Mileage was a little off compared to the 3.55's but towing at 60mph was around 1400 rpms and that produced alot of smoke. With the 07 six speed the key is running below 2000rpms. Keeping it under 65 netted me 16.5 mpg. Running 70 was 13ish and 75 was horrible. In the 11's. Now with the gear vendors OD, I can cruise at 75 and get high 16's cruising at 1750 rpms. 70 mph gives me right at 18.5 average. That is where I cruise. I had horrible mileage at first with my cruising speed, just have to know that the faster you go, the worse it gets. Now for towing, this is an awesome combination. The camper makes the truck work, but the gearing and the tranny work great. So far, only 3200 miles, but I love the truck.

scoggins
01-24-2007, 09:17 PM
you put an external OD on your 6spd?:o
I like the idea just don't want to part with the cash[nonono] [nonono] .

75bronco
01-25-2007, 07:25 PM
this is my 1st 6 speed and the clutch is easier than my partners 04 clutch. i run the mountains alot. always in the gas and out of it. i average 16.5, 06' megacab 4x4, 35" toyo's, attitude and a pacbrake. 5k on it

Texasimport
01-26-2007, 01:33 PM
I have had 2 6 speeds now first one was on a 3500 DRW 2X and I was consitently getting right about 20 MPG with it. Can't imagine you would want one of the autos they offer with these trucks.

hauliday
01-26-2007, 02:38 PM
I have had two as well an 02 and a 04 but this 07 is differnt the final ratio is lower so now at 70 mph the engine is turning close to 2300 rpm's

Flashman
01-28-2007, 04:43 PM
I think you need closer to 20,000 than 10,000 to break in. I am getting over 20 MPG onmy 2006 Mega 2500 4x4 6spd. I drive easy - under 65 and coast. I also have 34inch tires which llok good and lowermy RPM.

hottapper1
01-28-2007, 05:40 PM
I love mine hauled 17,000lb in hay friday and it pulled like a champ.[guitar]

hauliday
01-28-2007, 06:27 PM
I have had two as well an 02 and a 04 but this 07 is differnt the final ratio is lower so now at 70 mph the engine is turning close to 2300 rpm's

NO I think you all are missing the point if the engine is turning faster so there for it is firing more so more than likely it will use more fuel providing it is not being lugged. Yes i know it needs more miles but most of you people dont drive your trucks enough to do that. I generally put close to 10000 miles a month on a truck so thats over a 100k a year so if i loose 2 miles a gallon over 2 years thats usually the amount of time i keep a truck so that is a chunk of change and thats why im pi--ed off about[duhhh]

TSB
01-28-2007, 07:36 PM
One of the reasons I bought my '05 when I did was because I didn't want the G56 tranny. I wanted the ratio offered by the 3.73 and NV5600 since the G56 and 3.73 is equivilant to the 4.10 and NV5600. Granted I don't tow every day but alot of the mileage I put on is working the truck, either towing or plowing (with the '96) and about 65% towing with the '05. Most of my towing is in northern NE so I do see some grades. My average trailer weight is around 12K with a max around 20K, thats the loaded trailer only... I have done minor mod's to the '96 but nothing to the '05 (see sig.) and have no complaints with the gearing. No complaints with getting better fuel economy than most are reporting with the G56 or 4.10's either. Just my experience. When I'm running empty with the '05 I sometimes try to shift to the next gear when I'm already in 6th[duhhh] . This usually generates a little chuckle from my wife when she catches me [dummy] .