8 speed in 1500

[CUMMINZ]

The 2013 1500 will have 8 speed auto. Diesel is next for 8 speed.

 

[NIsaacs]

It looks like a good 1st gear at 4. 71 v/s the 6spd at 3. 00. Also electric power steering??? and radiator shutters. I like that part. It also has a start/stop feature. When you come to a complete stop the engine will shut off then re-start when you want to go???? that sounds dumb. It can be shut off tho.



Nick

 

['strokeThis_'07]

Diesel won't get the 8 speed. It may be a possibility if they come out with the 3. 0 CRD in the 1500, but the HD's won't see the 8 speed.

 

[jgillott]

I'm not familiar with the ratios in the current 5-speed auto in th 1/2 tons, but they could sure benefit from something between the current 1st and 2nd. Quite a gap there especially when trying to use the trans to slow a load down. You don't notice it as much accelerating.

 

[Bob4x4]

The 8 speed was designed to run behind the 3. 6l... ..... hopefully the hemi version will get some additional beef with over 100lbft more torque

 

[NIsaacs]

Dodge is only one of 10 brand name companies using or scheduled to use this transmission. Current power levels are at 516 lb tq. with a near future goal of 738 lbs tq. I would say the Cummins is definitely on the horizon.



Nick

 

['strokeThis_'07]

They're going to put a transmission rated 62 ft-lbs LESS than the current 800ft-lbs the Cummins is rated at behind the diesel?

Makes perfect sense

I would be shocked if the 6. 7 had an 8 speed behind it. Unless, of course, they do some serious reworking of the ZF to put up with the power.

 

[AClayton]

It is my understanding that the only need for a multiple spd transmission would be to compensate for low hp or get extremely heavy loads moving from a stop. With our current power levels approaching class 8 truck status, I can see no real benefit of an additional 2 spds in our trannies. Other than maybe the 'cool' factor, why would anybody need an extra 2 gears. With 4. 10's and and a 6spd you get all the benefits of a super low starting ratio plus an OD final ratio to keep rpm's down under 2000..... even @65mph.



My truck with 3. 55's pulls my 5th wheel very well at highway spds but I wish I had a much lower 1st gear. 4. 10's would be ideal for me but then I sacrifice my cruising spd rpm above 70mph... ... . uh, unloaded of course!



I really don't think our trucks need anything more than the 6 spds that we already have. One day when I can accept the fact that our Govt. has ruined our diesel truck options by hampering with the emissions crap, I will go ahead and purchase a new truck. I just can't accept all that govt. imposed 'junk' downstream of my exhaust! But I love the quiet cab, power and the 6 spd transmission!

 

[NIsaacs]

They're going to put a transmission rated 62 ft-lbs LESS than the current 800ft-lbs the Cummins is rated at behind the diesel?



Makes perfect sense



I would be shocked if the 6. 7 had an 8 speed behind it. Unless, of course, they do some serious reworking of the ZF to put up with the power.

Can you say... "torque management"?:-laf



Actually, it is not unusual for manufacturer's to overpower trannys and axles, they do it all the time.



The long range goal for the 8-speed is 1,000 ft lbs.



Nick

 

[jgillott]

I would assume that much of the new technology, radiator shutters, 8-speed trans, etc. is to assist in increasing mpg. Keeping the engine, especially a smaller cube gasser like the Pentastar V6, in the right RPM range for the given situation goes a long way for fuel mileage.

 

[Sticks]

1998. 5 - 2002 the auto engines were de-tuned to compensate for the 47re. Remember? High output and low output VP44s. No reason to believe that they won't do the same if they try to stuff one behind a CRD. All electronic controlled. A little tweak in the program and walla, lower output.



ETA - Gods... I'm "That Guy" that just dug up an old thread. Sorry.

 

[CUMMINZ]

The jump from the 48re to the 68rfe was the most terrific advancement DC has ever made. The difference in the long run from the 6 speed to an 8 speed will be just as great. For someone to say DC will NEVER harness the cummins with an 8 speed is a lunatic. The secret to a pulling diesel is as many gears as possible and keeping the engine RPM about the same while pulling. I did not explain that like an expert but I know if I have to downshift while in a hard pull - if the gear spread is a lot the engine will and does get into a loaded situation that may require downshifting again. Try doing a reverse move at low speed up a steep grade in reverse with a 48re and compare it to the same move with a 68rfe.

 

[p-Bar]

The jump from the 48re to the 68rfe was the most terrific advancement DC has ever made. The difference in the long run from the 6 speed to an 8 speed will be just as great. For someone to say DC will NEVER harness the cummins with an 8 speed is a lunatic. The secret to a pulling diesel is as many gears as possible and keeping the engine RPM about the same while pulling. I did not explain that like an expert but I know if I have to downshift while in a hard pull - if the gear spread is a lot the engine will and does get into a loaded situation that may require downshifting again. Try doing a reverse move at low speed up a steep grade in reverse with a 48re and compare it to the same move with a 68rfe.

Yup problem with 48re going from 3rd lock to OD not great . thinking of installing a browny box underdrive unit. My Hyundai Genesis has an 8 sp in it I think it's an Aisan

 

[AHarris]

My Hemi 8-speed is as smooth as glass and averages a solid 19. 5mpg (hand calculated). It would be awesome behind the diesel.

 

[AHarris]

The 8 speed was designed to run behind the 3. 6l... ..... hopefully the hemi version will get some additional beef with over 100lbft more torque

It does. There are two versions of the ZF 8-speed currently used in the Ram 1500s. THe 8HP45 with the Pentastar V6 is rated for 332 lbft of torque while the Hemi gets the higher capacity 8HP70 which is good for 516 lbft.



http://www.allpar.com/model/ram/dodge/2013-ram-powertrain.html

 

[Sticks]

It does. There are two versions of the ZF 8-speed currently used in the Ram 1500s. THe 8HP45 with the Pentastar V6 is rated for 332 lbft of torque while the Hemi gets the higher capacity 8HP70 which is good for 516 lbft.

http://www.allpar.com/model/ram/dodge/2013-ram-powertrain.html

That would work great behind a stock Second Gen.

 

[crispyboy]

They really need to work on the payload capacity of the half ton in general. I think it should be up closer to 1800 - 2000 lbs for a the crew cab truck to be competitive with the other brands. By the time you put a topper on the truck, load in mom, dad, kid and a dog, a few supplies in the bed and there isn't much room for the tongue weight of a trailer.

 

[CUMMINZ]

Well we are even closer to an introduction of a redesigned HD Cummins with 8 speed auto......

 

[NIsaacs]

Well we are even closer to an introduction of a redesigned HD Cummins with 8 speed auto......

You gonna share?

Nick

 

[CUMMINZ]

Been a while. Like I said it is a good chance for an 8 speed. in HDs.