8spd auto ! Cummins to 750tq + ! ! Larger Ram's ! ! ! - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 11 (permalink) Old 09-06-2010, 04:48 AM Thread Starter
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8spd auto ! Cummins to 750tq + ! ! Larger Ram's ! ! !

2011-2015 Chrysler/ fiat plans:
http://www.allpar.com/model/upcoming.html

8spd auto:
Quote:
ZF and Chrysler worked together to bring us a tough TorqueFlite-like eight speed automatic transmission for commercial trucks and SRT8 cars, with a torque rating of over 650 pound-feet, allowing Cummins to unlock some (not much) of the extra power hidden in the 6.7 B-diesels. The transmission uses three planetary gearsets, each of which costs about as much as a whole entry-level transmission.

Chrysler will start buying the transmission from ZF in (calendar or model year) 2012, while ITP (Kokomo) tools up to build it starting in 2014 (at a cost of $300 million). The transmission, also sold to BMW and Audi, should help Dodge to once again be the diesel-power leader. One source now says that this transmission will eventually replace the five-speed Mercedes automatic across the board once the contract with the Evil Commercial Truck Empire is up.

Chrysler is also to use a seven speed version of the Mercedes automatic transmission but we donít know when that will happen. The four speed will be dropped in favor of the Chrysler six-speed and Fiat dual-clutch. Transmissions.
More powerful Cummins:
Quote:
The Cummins straight-six diesel is still planned for future Rams and may get a kick up to 750 lb-ft of torque or more when coupled to the upcoming eight-speed automatic in 2012.

The 4.2 liter Cummins V6 (190 hp, over 400 lb-ft) and a 5.0-liter Cummins V8 diesel are believed to still be in progress, but lower priority due to low gas prices.
Larger Rams:
Quote:
Commercial heavy-duty trucks (e.g. tractors) might be planned, though they could be Ivecos rather than Ram chassis cabs, and aren't expected until 2015 at the earliest.

Reportedly heavy duty truck development is being slashed though there is an upcoming investment in 8-speed automatics that would allow higher torque (the new transmissions have an 650 lb-ft capacity ó though earlier word had it pegged at 800).

Mike

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post #2 of 11 (permalink) Old 09-06-2010, 03:27 PM
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Sounds like good news Mike, maybe Dodge is getting started to building a better truck.
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post #3 of 11 (permalink) Old 09-06-2010, 05:49 PM Thread Starter
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Sure seem like RAM might just become a force to be reckoned with

Ford & GM with there 400 / 800 diesel's now, But the Cummins 6.7 hit Commercial truck's in 07' with 375hp / 735tq . . .

FoMoCo & GM were peddling 365hp/650tq ish diesel's

The RAM's drive train caused the need for the 305 /610 & 350 /650 De-tune


Mike

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post #4 of 11 (permalink) Old 09-06-2010, 06:44 PM
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I know a 8 or a 10 sp in a semi is nice but do we really need that many gears in a pickup. O-well most diesel buyers are towing trailers anyway.
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post #5 of 11 (permalink) Old 09-06-2010, 06:56 PM Thread Starter
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5-8spd Big truck's are mostly dump/tow ect truck's.

Most over the road truck's were 9-13spd's now they seem to be mostly 13 & 18spd's with a few 9 & 10 spd's dotted in here n there


6-8spd Auto's and 5-7spd Manuals seem to be the wave of the future for light & medium duty trucks


Mike

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post #6 of 11 (permalink) Old 09-08-2010, 03:24 AM
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I know a 8 or a 10 sp in a semi is nice but do we really need that many gears in a pickup. O-well most diesel buyers are towing trailers anyway.
Does it really matter if we "need" it or not... heck, if that a bullet proof and help with mileage why not. I am still interested in how Ram/Cummins are going to handle the new numbers posted from the competition. I bet that don't take it sitting down. I see it as a race to 500hp/1000fts off the show room floor.

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post #7 of 11 (permalink) Old 09-08-2010, 04:30 AM Thread Starter
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Currently GM & Ford are winning the power war's, but if the 8spd was in place for 08' like it was supposed to be, the 6.7-CTD would have been the leader with 375hp /735tq . . .

Chrysler pushed back the 8spd to 12'/14' and went with the 6spd trans instead so the 6.7's got De-tuned

I'm sure once RAM's Drive train catches up, Cummins will make plenty of power with that 6.7L I-6


Mike

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post #8 of 11 (permalink) Old 09-08-2010, 11:02 PM
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Cummins has a 5.9 HO 480 for marine use that is making 480 hp and 997 torque now, marine usually make more power than automotive.
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post #9 of 11 (permalink) Old 09-09-2010, 12:56 AM Thread Starter
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well when you have unlimited cooling capability's you can run big numbers easy, Did you know there a tons of Marine GM-6.5's running 450hp ? and doing it reliably to boot . . .

Know in truck the GM-6.5 is all done at 300hp starts having over heating issue's 250-275hp is all it'll reliably run in a truck app . . . well as reliable as a 6.5 gets anyhow . . .

Anywho back to Cummins diesel, i'll have to see if anybody offers a 6.7 marine engine.
Then we can see what the factory will push out of the 6.7-CTD.


Mike

1953 REO M48 w/w.
1962 GMC C45.
1969 AMC AMX -390.
1971 AMC /Jeep J4K-DRW.
1988 AMC /Jeep Comanche.
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post #10 of 11 (permalink) Old 09-09-2010, 08:39 PM
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As late as 09 Cummins was only offering the HO 480 in a 5.9 now with the new emissions system they may have something better... I hope.

I did not know the 6.5 chevy did so well as a marine engine.
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