48RE + Exhaust Brake: Current Status

[TCDiesel]

Even when they finally get it approved,I think the TC is just to NOT going to stay lock up below 35 mph at best. If it can"t stay lock up on the way up NOW,What changes are going to have to made so it will stay lock up on the way down. The DC TC was never manufacture to operate with a E/B. I think major changes are needed to get it to function properly. and if you wait until certifiable it may just be, another disapointment,Upgrade your transmission now and every time you flip that switch you will have a big smile on your face.

 

[LightmanE300]

If one was to switch the TC and VB to say ATS or DTT, would the 48re then be exhaust brake compatible??

 

[p-Bar]

Even when they finally get it approved,I think the TC is just to NOT going to stay lock up below 35 mph at best. If it can"t stay lock up on the way up NOW,What changes are going to have to made so it will stay lock up on the way down. The DC TC was never manufacture to operate with a E/B. I think major changes are needed to get it to function properly. and if you wait until certifiable it may just be, another disapointment,Upgrade your transmission now and every time you flip that switch you will have a big smile on your face.

Their is a better chance that the torque converter will stay locked up, due to the fact of the higher pressure in the valve body from the previous model and the fact that the motor controls the trans. I think it's going to be more of a thrust bearing issue .

 

[TCDiesel]

I have check the spec"s from the 47re & the 48re they are all wthin 2psi of each other. The 48re have the same TC & VB, DC added some items in the drive section,But it has the same weak link as the 47re TC & VB.

 

[Heelin]

You know on the 48RE, you can lock the TC by shifting into 2nd gear with 0 throttle then a quick tap on the accelorator locks it up and it stays locked until you apply throttle again. . just for anyone who doesn't know Oo. By the way I'm new here and new to Dodge trucks! need to figure out how to do my sig. ? Later Y.

 

[thejeepdude]

I have check the spec"s from the 47re & the 48re they are all wthin 2psi of each other. The 48re have the same TC & VB, DC added some items in the drive section,But it has the same weak link as the 47re TC & VB.

Actually, same TC, different VB, but quite similar.

 

[Matt400]

you can lock the TC by shifting into 2nd gear with 0 throttle then a quick tap on the accelorator locks it up and it stays locked until you apply throttle again

Great tip Yale and welcome to TDR. Once locked up that way I wonder if bumping the lever up to "D" would also keep it locked?



I doubt DC would allow for a locked shift but maybe so with no throttle... gonna have to try that.

 

[LewisD]

You know on the 48RE, you can lock the TC by shifting into 2nd gear with 0 throttle then a quick tap on the accelorator locks it up and it stays locked until you apply throttle again. . just for anyone who doesn't know Oo. By the way I'm new here and new to Dodge trucks! need to figure out how to do my sig. ? Later Y.

Yale have you actually tried this and do you know what would be a safe speed to actually attempt this without braking something?



I hate it when I brake things :-laf

 

[Heelin]

LewisD,



Yes I have done it. I did it at slower speeds to start just to see if it worked (30 mph) then I tried it at 45 and it works fine. If you shift up it un-locks. Too bad you can't do that in 3rd as well. I think this was put in for use with the Jacobs brake?

I sure would like to know what their plans are for that. I have this feeling that us 04. 5 owners are going to be out in the cold on that and the 05's might get it? Who knows??

Anyway try it at slower speeds first to see how it works, pretty slick!



Later Y.

 

[BRayls]

05 trannys have been going down the line for about 2 months now,and they are not approved yet.

 

[TFunfer]

BRayls,

DC won't greenlight the 05 trannys until the testing is complete and all is well. I just hope the people buying the early 05 models will be able to have the brake installed without having to do any mods to there transmission.

I am still waiting on the outcome. When the dust settles I may end up holding out for a 2006 model, although I am not too keen on the rumours of the 06 models looking similar to the 05 Dakota's

 

[E2360]

Strength in numbers?

Just a thought here guys,(and gals) there are enough of us that are unhappy with the EB issue from 2003 on. I was wondering if any of the moderators or anyone else has the name and address of a DC and or Cummins official that we can all mail letters to?



A couple of thousand letters to a few officers in the respective companies that actually have some influence on the issue, along with copies to a govermental consumer advocacy group might just "grease the wheels" for all of us misslead when we bought the 48's.



Post a name and I'll write a letter and spend the $3 bucks to send it certified. It always gets their attention a little more when sent that way.

 

[TCDiesel]

Maybe some felt that the 48re was a new designed transmission and TC in reality it was a 47re with some added clutch packing and gearing,until DC has a new (and re-designed) TC that can handle the effects of a EB or engine brake(I would like to see cummins make a engine brake for the ISB). More disapointment is in the future,for the 48re.

 

[thejeepdude]

Maybe some felt that the 48re was a new designed transmission and TC in reality it was a 47re with some added clutch packing and gearing,until DC has a new (and re-designed) TC that can handle the effects of a EB or engine brake(I would like to see cummins make a engine brake for the ISB). More disapointment is in the future,for the 48re.

Then do you think Carlton Bale is feeding us a line of bull about the hardware for the EB already being in the late '04. 5 and newer trucks, while the software is being finalized and tested by numerous test trucks already on the road? The TC doesn't need to be anything special, as long as it can stay locked and unlock when it's supposed to. The process of making that happen is in its final stages of development from what he says. However, I do agree with you that whatever replaces the 48RE will be EB certified from the get-go, but personally I'd rather have the strong (especially w/mods) and proven 4 speed over any brand new transmission that hasn't yet stood the test of time.

 

[TCDiesel]

I lease a truck from penske truck lease,It had a eaton automatic with a isl cummins with engine brake. When engine brake applied down to around 40 mph the brake would work fine,after that the lock up would dis-engage between shifts, if you touch the brake when dis-engage and than touch the go pedal the truck would RAM CLUNK to lock up and than the results would be dead pedal. Also between shifts in the lower gears if you did not feather the pedal at a incline the truck would just stop, some times right in the middle of a intersection. One of our driver refused to operate it. I was more than happy to return it. I was under the impression that eaton had one of the best automatics in the world. {In medium Duty trucks}. I think if a manufacturer made a engine brake for the isb people would buy it even if the cost was in the $1,800. 00 range I know, I would.

 

[HenryH]

Thanks for your attention to this matter.

James H. Harrell

2492 Entrada Dr.

Virginia Beach, Va.

23456

 

[MCrossley]

I do not think that this guy is full of it at all if you follow mine and others threads about the changes to 05 trucks you already know there is no longer a kick down cable for the trans nor a vacume system for the cruise control. We were delivered an 05 truck on Friday which I personally drove and looked at and for FACT the transmission DOES have a completly different shift schedule on decel than the 04. 5 trucks do so I do think he is right about the 05's and the fact that they are in deed different from a hardware standpoint; Are they certified yet for the EB NO but hey we are getting closer and I for one hope my 05 that cannot seem to make it into production is ready for one.

 

[LightmanE300]

No offense, but I personally don't give a darn about '05 trucks being compatible... plenty of us have been waiting since 03 for them to come up with a way for 48RE owners to have an exhaust brake. DC and Cummins screwed us over big time IMO.

 

[thejeepdude]

No offense, but I personally don't give a darn about '05 trucks being compatible...

That's because you ain't got one! Did DC give you the shaft? Yup!! Does it do any good to whine about it? Nope, they don't listen. Upgrade your transmission if you want an EB... it's completely doable.

 

[LightmanE300]

Well I guess I was hoping they might listen. Cummins has a link to TDR on their site, apparently someone there has seen it...