Cummins development progresses

[joecar]

Joe, you've got to get out more
Paul

I drive my car everyday, does that count...

[THEFERMANATOR]

I know the 47RE did not have a solonoid to control the line pressure, and I believe the 48RE is the same way. I know there is a valve to regulate line pressure statically like an 01-10 ALLISON trans does. It uses throttle pressure against governor pressure to control shift firmness is how I understand it.

[L31Sleeper]

I know the 47RE did not have a solonoid to control the line pressure, and I believe the 48RE is the same way. I know there is a valve to regulate line pressure statically like an 01-10 ALLISON trans does. It uses throttle pressure against governor pressure to control shift firmness is how I understand it.

Where does Throttle Pressure come from a TV cable ??

[JoshH]

I know the 47RE did not have a solonoid to control the line pressure, and I believe the 48RE is the same way. I know there is a valve to regulate line pressure statically like an 01-10 ALLISON trans does. It uses throttle pressure against governor pressure to control shift firmness is how I understand it.

Yep, the 48RE valve body is basically identical to the 47RE. There are very few electronics in the transmissions. There is a 2 solenoid pack that controls converter lockup and overdrive. Then there is the governor parts that consist of a governor pressure sensor, which also contains the transmission fluid temperature sensor, and the governor pressure solenoid.

Where does Throttle Pressure come from a TV cable ??

Like has been said before, it is either a cable going to the throttle linkage on the 47RE or a TTVA (shown in the illustration below) on the 48RE.

[L31Sleeper]

Yep, the 48RE valve body is basically identical to the 47RE. There are very few electronics in the transmissions. There is a 2 solenoid pack that controls converter lockup and overdrive. Then there is the governor parts that consist of a governor pressure sensor, which also contains the transmission fluid sensor, and the governor pressure solenoid.

Like has been said before, it is either a cable going to the throttle linkage on the 47RE or a TTVA (shown in the illustration below) on the 48RE.

So we can use the governor pressure solenoid to control shift points and the TTVA to control Firmness ?

[THEFERMANATOR]

So we can use the governor pressure solenoid to control shift points and the TTVA to control Firmness ?

To an extent. This is how the old BD locker worked. It would pull the TV arm to almost full open(roughly 85% which was not enough to cause a downshift, but still max line pressure) when it was applied on the 47RE to up line pressure. There is also a main regulator in the valve body though that controls overall pressure to the trans. A pressure control solonoid, and a couple of shift solonoids would have given almost infinite control of the trans, but DODGE went with a pretty goofy and marginal control system(I think) to accomplish it.

[dansdieselp]

Either way just like a Allison you will have to build the trans to make good power with the truck. The Dodge trannys are simple in the fact that not much electronics are involved. The majority of the shift firmness and line pressure upgrades are done in the valve body. I have a list of customers that are eagerly awaiting the release of custom tuning for their trucks. We are looking forward to it. Be interesting to see how the Cummins will compare to the Dmax once they get tuned in.

[cumminsDK]

with november 30th release i can now read cummins ECM's with V8 but can not edit. When i try to open it with V7.5 it says file binary image is not a valid binary size. is this normal for now or should i have these features?

[THEFERMANATOR]

with november 30th release i can now read cummins ECM's with V8 but can not edit. When i try to open it with V7.5 it says file binary image is not a valid binary size. is this normal for now or should i have these features?

When I read the V8 updates, it only listed reading support for now for the CUMMINS controllers.

[Tordne]

with november 30th release i can now read cummins ECM's with V8 but can not edit. When i try to open it with V7.5 it says file binary image is not a valid binary size. is this normal for now or should i have these features?

Yeah, no calibration editing or flashing is released at this time. TO answer your next question; we are not able to give a timeframe for release yet. We are progressing well, but there is still some milestones to be achieved.