2016 Wrangler JK Information Thread - Page 340 - Jeep Garage - Jeep Forum

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  #4069  
Old 01-21-2016, 07:23 PM
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re: 2016 Wrangler JK Information Thread

Quote:
Originally Posted by ArcherAce View Post
Not yet. This one is another pilot
on the inside info!

Man a 75th 2dr in sarge with 6sp manual is tempting even with a unlimited rubi on order.

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  #4070  
Old 01-21-2016, 08:10 PM
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Originally Posted by Milous View Post
JL and JT . 3.0L by the way. + New 8-spd 2nd gen trans (8HP75).
Man, how can you do that to me? Just when I thought I would be done and happy with my Gecko...
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  #4071  
Old 01-21-2016, 10:08 PM
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Originally Posted by Milous View Post
JL and JT . 3.0L by the way. + New 8-spd 2nd gen trans (8HP75).
They're putting the 8spd auto behind a diesel? Nice!
Tell you what, we all go crazy around here just to get a glimpse of a new color. Whats it going to be like when unveiling time gets closer and closer with the new JL?
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  #4072  
Old 01-21-2016, 10:21 PM
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re: 2016 Wrangler JK Information Thread

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Originally Posted by SeaJay View Post
They're putting the 8spd auto behind a diesel? Nice!
Tell you what, we all go crazy around here just to get a glimpse of a new color. Whats it going to be like when unveiling time gets closer and closer with the new JL?
Entropy.
Madness.
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  #4073  
Old 01-21-2016, 10:25 PM
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re: 2016 Wrangler JK Information Thread

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Originally Posted by SeaJay View Post
They're putting the 8spd auto behind a diesel? Nice!
Tell you what, we all go crazy around here just to get a glimpse of a new color. Whats it going to be like when unveiling time gets closer and closer with the new JL?
The use/availability of the 8 speed may be more nuanced than that. A long stroke (stroke is equal or larger than the bore diameter) diesel will likely have a much longer, larger torque curve (more area under the curve) with lower RPM and not benefit, I would even hazard a guess that absent electronics to make better shift decisions it's more of a detriment actually, with that many gear options. On the other hand, the pentastar 3.6 L is a short stroke engine (stroke is shorter than the bore diameter). Short stroke engines usually have smaller, shorter torque curves (less area under the curve) and have a higher RPM (they trade displacement for RPM to generate power). These engines benefit from more gearing options. i.e.; The so called "power band" of a long stroke engine, all things being equal, is wider than a short stroke engine.

So if there is a diesel option, it's not going to benefit from 8 speeds, again absent electronics that will balance economy with torque under load v. low load conditions differently. That said, economics may drive this decision and they may not want to run two sets of transmissions for the two engine options.
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Old 01-21-2016, 10:31 PM
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re: 2016 Wrangler JK Information Thread

This logic would be correct for a long stroke vs short stroke on a gas motor, but doesn't hold water on a diesel. The new transmissions can change gears faster than a diesel can wind up, not to mention the lower red line of a diesel. Tractor trailers have 21 and 24 speed transmissions for a reason.
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  #4075  
Old 01-21-2016, 10:46 PM
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re: 2016 Wrangler JK Information Thread

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Originally Posted by dirtdobber View Post
This logic would be correct for a long stroke vs short stroke on a gas motor, but doesn't hold water on a diesel. The new transmissions can change gears faster than a diesel can wind up, not to mention the lower red line of a diesel. Tractor trailers have 21 and 24 speed transmissions for a reason.
Trucks have many gears because they run from 30K pounds empty to 80K pounds with cargo. That would take a 4K pound wrangler and make it 11K pounds loaded. The latter is not happening. And stroke/bore ratio logic holds for steam engines as well as diesel. It's not specifically a cause of power, but incidental to efficiency and what drives the tuning options chosen when an engine is designed.

Anyhow, whatever decision they make, it may not include mating that transmission with that engine, or it may. Just butting in to tamp expectations. I will go away now.
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  #4076  
Old 01-22-2016, 02:41 AM
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re: 2016 Wrangler JK Information Thread

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Originally Posted by terraformer View Post
... they may not want to run two sets of transmissions for the two engine options.
TWO 8-speeds, THREE engines .
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  #4077  
Old 01-22-2016, 02:44 AM
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re: 2016 Wrangler JK Information Thread

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Originally Posted by terraformer View Post
...it may not include mating that transmission with that engine, or it may.
3.0 CRD w/8HP75.
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Old 01-22-2016, 04:41 AM
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TWO 8-speeds, THREE engines .
Is this for MY 2018 to begin production summer 2017?
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  #4079  
Old 01-22-2016, 07:52 AM
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re: 2016 Wrangler JK Information Thread

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TWO 8-speeds, THREE engines .
Oh my... Is this a Hemi option?
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  #4080  
Old 01-22-2016, 08:23 AM
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re: 2016 Wrangler JK Information Thread

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Originally Posted by terraformer View Post
Oh my... Is this a Hemi option?
Screw the diesel, and bring me a Hemi.
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