big red psd cc

If you order it now, you'll probably get the new tranny, rather than the NV5600.
And order you put in now, wont be produced until Jan or Feb, because the factory shuts down for the holiday's.

And its not a Getrag......its shows it as a D-C creation....no mention of Getrag. Just because it has a "G" in its name.....not necessarily a Getrag.

mdirenzo

I've been looking at ordering a new 05... got concerned when I heard the NV5600 was being replaced with the G56, so I tried researching the G56. I wasn't able to find a whole lot, but some of the ratings have me concerned. I found some info at http://benzworld.org/news/news.asp?id=106 regarding the production... note that worried me was:

"Transmissions G56, G60 and G85 have the respective torque of 580, 600 and 850 Nm. Model G56 is applied to light vehicles, from 7 to 10 tons, and medium ones from 11 to 12 tons; model G60 may equip medium vehicles from 12 to 14 tons, and semi-heavy ones from 14 to 17 tons; and model G85 is destined to heavy vehicles."

580 Nm is rather low... I also found a Mercedes CVD PDF file showing the transmissions they mate up to their trucks, and the G56 seems to be used in vehicles w/less than 450 ft. lb. of torque. At least the weight ratings are basically correct. Maybe someone else can shed light on this?

EKUgrad

I am worried now, too. If I remember correctly, the conversion factor from ft-lbs to N-m is 1.35(ft-lb)=N-m. If that is the case, the G56 is only rated for 430 ft-lb of torque!!!

It may be fine behind the hemi, but the Cummins will chew it up and spit it out unless they do something to beef it up considerably.

I hope that their warranty/lemon insurance is paid in full.

Mopar_Mudder

1 Nm = 0.73756 ft/lb

Big Bob

That would mean that the G56 is rated at 786.38 ft/lbs. Now I don't know if this is input torque.

The input torque rating of a NV5600 it 550 ft-lb.

mdirenzo

786 ft/lb would be reassuring, but that's not correct. Both examples above are the same... 1 Nm = 0.73 ft/lb, i.e. 580 Nm x 0.73 = 423 ft/lb. That's the same as saying 423 ft/lb x 1.35 = ~580 Nm. If 580 Nm is the correct torque rating, then the G56 is rated for only 430 ft/lb of torque. In the Mercedes CVD PDF file, I see the G56 mated to engines producing less than 450 ft/lb of torque, and I see the G60 or G85 being mated to more powerful engines. I was hoping that someone might know something more about the tranny, like possible upgrades, built-in margins, whatever..... but there's not much published info available. Dealerships seem to have no information. Makes placing a new order a tough decision! I just can't stand the thought of an auto trans, either.

I don't see why these ratings would be anything other than input torque... nothing else would make sense, really.

Big Bob

OPPS, you're right! Sorry guys.

JamesP

Torque management is going to have to work overtime

sawboywv1

I heard that Cummins was going to a Aluminum cylinder head in 06 as well?

hoot

Yes on the V6 an V8 that's already running and being tested.

CTDHokie

If the tranny is only going to be rated for 430ish ft-lbs it seems to me it is more and more looking like it is designed for the Hemi's 375 ftlbs. I guess dodge is just going to hope it lasts long enough on stock Cummins.

EKUgrad

I emailed Dodge last night -- no response yet. We will see what they have to say about it. I'll keep ya informed.

EKUgrad

Well fellas, no help from DC.... Here is their reply:

"Thank you for contacting DaimlerChrysler regarding this question.
Unfortunately, the technical information you request is not available
via this web site.
We recommend that you contact your local DaimlerChrysler dealer, or
Cummins Diesel
Technical Assistance
*800-DIESELS
*800-343-7357
Thank you again for your email."

I don't see that it is Cummins problem if DC chooses to put a POS tranny behind their good engine, the same way that it is not the big C's fault that the sheet metal is too thin or the seats are not the greatest.

Oh well, back to the drawing board.