New Auto Transmissions

[kensass]

My dealer has informed me that eventually Dodge is going to a NAG auto transmission in the Cummins diesel. It is German and supposedly "bulletproof". He also says that before that comes on line a 6 speed auto will be offered. This may be the Japanese unit that I have seen discussed elsewhere in this forum. I note this because of my dissatisfaction with the auto trans in my 04 diesel RAM and my desire to replace it. (see previous thread regarding slipping transmission) However, the NAG unit will not connect with my Cummins. Hopefully the 6 speed will.



He contends that the bands are correctly adjusted and the transmission is up to spec. I plan on making him eat those words when I have the other transmission installed. I should be entitled to a high trade in value if the transmission is "OK. "

 

[DieselFiend]

are you modded? when I was towing 10,000 lbs last month, I had my edge juice on 2/3. When I put the coals to her the transmission was slipping up to 15%. I kept my foot out of it upon noticing that. When I set it back to stock, I can throw her the coals and no slippage.

 

[raychem]

My dealer has informed me that eventually Dodge is going to a NAG auto transmission in the Cummins diesel. It is German and supposedly "bulletproof". He also says that before that comes on line a 6 speed auto will be offered. This may be the Japanese unit that I have seen discussed elsewhere in this forum. I note this because of my dissatisfaction with the auto trans in my 04 diesel RAM and my desire to replace it. (see previous thread regarding slipping transmission) However, the NAG unit will not connect with my Cummins. Hopefully the 6 speed will.



He contends that the bands are correctly adjusted and the transmission is up to spec. I plan on making him eat those words when I have the other transmission installed. I should be entitled to a high trade in value if the transmission is "OK. "

Dodge will not be using an NAG transmission. The units that will be used is the Asasin unit which will be a 6 speed autoused in the chassie cab. And I believe that for 07 when the 6. 7 L cummins is realeased they will be using a 68 re trans. There have been a few recent treads on the subject but d/c is tight lipped about all the specifics. From your previous treads that you are not fond of the auto. You should drive a built auto to see if you like it any better. Its alot cheaper than changing trannies and you will keep the reliability.





Richard

 

[raf2000]

I have a 1 day old 2006 3500 4x4. Is the Edge juice w/tude the hot setup for the 2006's? I have a 6 year old 2nd gen with an EZ on it and it's great. I can't drop another 4G on another transmission (yet anyway). Looks like the slip readout is a lifesaver. .



Where are you guys buying them from?

 

[BRayls]

My dealer has informed me that eventually Dodge is going to a NAG auto transmission in the Cummins diesel. It is German and supposedly "bulletproof". He also says that before that comes on line a 6 speed auto will be offered. This may be the Japanese unit that I have seen discussed elsewhere in this forum. I note this because of my dissatisfaction with the auto trans in my 04 diesel RAM and my desire to replace it. (see previous thread regarding slipping transmission) However, the NAG unit will not connect with my Cummins. Hopefully the 6 speed will.



He contends that the bands are correctly adjusted and the transmission is up to spec. I plan on making him eat those words when I have the other transmission installed. I should be entitled to a high trade in value if the transmission is "OK. "

they have differant bellhousings as the 6. 7 is larger. the aisin and the dc unit, which may well be the same as the unit you mention. however it is being built in the trans plant that builds the 5 speed in the trucks now. the 5 spd units that come in cars is a american made copy of a german unit.

 

[kensass]

Dear Richard,



Thats what I said. The NAG comes later. See subsquent threads.

 

[kensass]

I am totally stock. What is a "built" transmission? I am not a mechanic and understand very little of the jargon used in these threads. I don't know a lock up from a lock out. I just know something is wrong and is not getting fixed.

 

[klenger]

A "built transmission" is a automatic transmission with $3000 worth of mods to make it work as well as a stock 6 speed manual that cost less than the stock auto did.



Settle down, it was a joke.

 

[raychem]

I am totally stock. What is a "built" transmission? I am not a mechanic and understand very little of the jargon used in these threads. I don't know a lock up from a lock out. I just know something is wrong and is not getting fixed.

Built transmissions usually include torque converter, valve body, and internal modofications which change the characteristics of the trans. Also remember that the 48 re(04 TRUCK) is a bit more "involved" if I were to say than the older transmissions used in the 2nd gen trucks(47 re) The ecm controls the trans and many on this board ask questions on how the trans behaves. I courious as to what yours is doing? Also. . knowing dodge and how slow it is to address changes at times, who knows how long before they put a german trans in our trucks since they are switching to the asasin unit on the chassie cab w/ 6. 7 cummins. They will continue to use the 48 re in our trucks unit Jan. 07 when they change the line to the 6. 7 and discontinue the 5. 9. When this happens the 68 re will take over which is a canadian built trans. SO who knows when the NAG will come along.





Richard

 

[kensass]

At 65MPH is slips out of overdrive or at least is seem like it. The revs go up and the truck slow down. Let off the pedal and it fixes itself and it doesn't happen all the time. Especially when the dealer drives it. Another strange thing is that if you engage the cruise control at 60MPH and use accel. to get up to 65 you can go all day without a problem. This problem first showed up at around 30,000 miles and at first it would happen even if I was in cruise control. Now it doesn't. I was told by a member of TDR that it was the bands. The factory sets them too loose so the trans. will shift smoothly. The dealer of course disputes this. In November of 05 some sort of service bulletin came out about the transmission and while they did a transmission service they performed the fix - which I believe included adjusting the bands. This "fix" worked for about a month and indeed the tranmission shifted more abruptly during that time.



Ken

 

[BlackRam69]

OK, First off I would like to thank everyone as I have lurked around the TDR for some time and reviewed the posts to answer many questions.



Also as evidenced here in my first post I finally got off my *ss and signed up.



Now, I want to say that I did read the "transmission" notice and have a burning question for those with an auto.



I have come acustomed to the additional HP and torque provided by the combination of QuadZilla econo chip and the BDTD. I have however noticed some slip. (especially when using the higher settings)



Now currently the truck is stock with an open intake and exhaust and with the combination noted above the power / torque output (for the time being) is quite enough.



The question is... ...



Not to be brand specific but could I upgrade the valve body alone to address this and for how long or, would an upgraded torque converter fit the bill. (or both?) Again I'm only adding an additional prob 70-120 HP max.



Anyone running a similar set up and if so any input on the good, bad, and ugly is greatly appreciated!





'06 2500 Mega Cab Auto, 3. 73's drop in filter, 5" turbo back MBRP with Aero muff/resonator. Quadzilla econo chip & Bully Dog Triple Dog

 

[raychem]

BlackRam69,



Welcome to the TDR. It's money well spent with the info on this board alone. So you know, I have a 05 3500 with only an ez(65 hp) and the trans is already feeling it remember its not the hp but the torque increase that accompnies the hp increase which is roughly 2 to 1( ex 65 hp is about 130 ft lbs of torque). In your case any where from 140 to 300. As for your question, many have different opinions on what to do. A vb alone will in most cases; depending on which company you go with will improve shifts and raise line pressure BUT only a bit since the ecm will go into limp mode if line pressure increases too much. But that alone will not adress your issues with the increased hp you have. A better more efficent TC will give you better performance (fluid coupling and torque multiplication)along with a vb since most companies set-up there vb's and tc's to work together. The thing with tc/vb combinations is that the rest of the transmission does not have all of the extras that a full trans has from one of the aftermarket companies. I am am installer and builder for a trans company and I own an auto truck too. I have been seeing what the stocker can hold and while some may disagree with me, anything over 30 hp and you are on borrowed time cause my trans is slowly fading after only 2 months. Let me know if I can help you with anything else.





Richard

 

[zstroken]

Defined computer controlled. Any of the RE units have a computer controlled govenor pressure OD, and lockup. 04 transmission is the same as the 03. 04. 5 the transmission is the same, they just added a servo motor where the old throttle cable linkage went. It allows them to take some control of the shift points with the ECM

 

[raychem]

zstroken,

Thats what I was getting to without going into detail. Since BlackRam69 has

an 06 compared with the older 47's, the ecm does have more control over what the trans is doing and with the servo accuator now on the TV, your at the mercy of what the ecm commands. Not like before where you could adjust the TV cable and change your shift point a bit. The ecm nightmares are the allison trans with 3 different computers to control them.

 

[Nelssen]

Just curious. My 06 Mega auto has a space in the fuse box for the "aisin". Planning ahead?

 

[BlackRam69]

With the ecm having so much control / monitoring the trans. regardless of what I do (valve body/torque or built transmission- ) would the ecm try and step in as all of these usually run with higher pressures (>90 psi?) Whats stock like 70ish?



Just tryin to get my mind around this. My knowledge base is (very) limited in this area.



Thyanks again.

 

[raychem]

I do not want you to think that the ecm has all this control. I want you to think that is has just enough control. The ecm moniters line pressure via the pressure sender in the vb and will sent the trans into limp mode if they go to high. With the install of the vb, since you are running higher pressures, we "trick" the ecm via voltage regulator so it never does see the higher pressures.



Richard