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  #13  
Old 09-08-2015, 04:50 PM
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Re: Wind resistance or fish bite?

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Originally Posted by NetworkTV View Post
Just don't forget to press and hold the + paddle to go back to auto if you don't want to keep shifting manually. Otherwise, the vehicle is going to be winding way out on each gear without shifting because it expects you to do it.

You'll be headed out from a traffic light and wondering why you're still in first at 6K RPMs when it hits you that you're in paddle shift mode.
Knowing me and being absent minded, I would do that! lol! Thanks again!

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  #14  
Old 09-08-2015, 07:03 PM
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Re: Wind resistance or fish bite?

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Originally Posted by TypeRod View Post

UPDATE: Sorry I mixed up hill decent and hill start assist. lol
Opps, my bad...I meant to say hill assist
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  #15  
Old 09-08-2015, 07:51 PM
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Re: Wind resistance or fish bite?

Hi Guys

I think you will find that the "feeling" is the transmission downshifting when coasting downhill BUT only if you even slightly press the brake pedal and no accelerator.

Personally I think this is a smart feature of the transmission in that say for example you were cruising along and came to a town with a lower speed limit. By not pressing the accelerator and having hit the brake to slow down, the vehicle "knows" what your intention is so downshifts to slow the vehicle.

Have to say that it has stopped me getting a ticket on a number of occasions.

I like it.

PS It won't do it UNLESS you have hit the brake pedal.
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  #16  
Old 09-08-2015, 10:02 PM
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Re: Wind resistance or fish bite?

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Originally Posted by Ineedabiggerboat View Post
Hi Guys


PS It won't do it UNLESS you have hit the brake pedal.
Mine definitely slows down if I just take my foot off the accelerator. I have not touched the brake pedal yet. There are a few traffic lights in my area that can be seen from quite a distance and some have a slight downgrade leading up to them. I prefer just to coast to the red light instead of racing there then jamming on the brakes. However, I feel that I have traffic riding my butt b/c I am slowing down way too soon. A quick tap on the + paddle shifter and I am cruising all the way to the light.

AND YES, the first day I had the GC I forgot (more accurately, didn't know at the time) to hold the + paddle for 2-3 seconds and it takes you out of manual mode for normal automatic trans operation to resume
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  #17  
Old 09-09-2015, 02:21 AM
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Re: Wind resistance or fish bite?

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Originally Posted by TypeRod View Post
So I just a ~360 mile round trip in my 2014 JGC HEMI Summit yesterday, and I started noticing that while just driving at a steady speed I was just feel a "fish bite" sensation from the car. And it would come and go, no rhyme or reason.

Any ideas or similiar experiences? TIA!
I wouldn't think you'd notice it so much with the Hemi, but in my 2000 WJ with the 4.7L V8 you could sometimes feel a 'ghost bump' when the A/C compressor engaged.
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  #18  
Old 09-09-2015, 05:11 AM
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Re: Wind resistance or fish bite?

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Originally Posted by xjnewbie View Post
Mine definitely slows down if I just take my foot off the accelerator. I have not touched the brake pedal yet. There are a few traffic lights in my area that can be seen from quite a distance and some have a slight downgrade leading up to them. I prefer just to coast to the red light instead of racing there then jamming on the brakes. However, I feel that I have traffic riding my butt b/c I am slowing down way too soon. A quick tap on the + paddle shifter and I am cruising all the way to the light.

AND YES, the first day I had the GC I forgot (more accurately, didn't know at the time) to hold the + paddle for 2-3 seconds and it takes you out of manual mode for normal automatic trans operation to resume
I tried it this morning on my way to work, but I wasn't sure if it felt like a true "free wheel", lol. It held it at 6th gear as I was going downhill, and I didn't feel like it was free wheeling, so I tapped the + paddle again and it wouldn't go into 7th, and now I can't remember if I had to press the brake or accelerate a bit to get it to finally paddle shift into 7th. I'll keep experimenting with it. I also already had "hill start assist" unchecked in my uconnect settings.

EDIT: I also feel like I had read somewhere that the 8 speed will not free wheel at all....but I can't remember which forum I read it on. I'll search for it.....
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  #19  
Old 09-09-2015, 03:39 PM
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Re: Wind resistance or fish bite?

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Originally Posted by TypeRod View Post
I tried it this morning on my way to work, but I wasn't sure if it felt like a true "free wheel", lol. It held it at 6th gear as I was going downhill, and I didn't feel like it was free wheeling, so I tapped the + paddle again and it wouldn't go into 7th, and now I can't remember if I had to press the brake or accelerate a bit to get it to finally paddle shift into 7th. I'll keep experimenting with it. I also already had "hill start assist" unchecked in my uconnect settings.
By "wouldn't go into 7th" do you mean the message in the dash said "shift not allowed" or it just didn't go into 7th when you hit the + paddle?

If the former, it's possible shifting into paddle mode disengaged the engine braking, making your speed creep up enough to allow the shift at some point.

If the latter, you probably didn't hit it the second time you needed to: first press to activate the paddles, second press to shift up from the current gear.


Quote:
EDIT: I also feel like I had read somewhere that the 8 speed will not free wheel at all....but I can't remember which forum I read it on. I'll search for it.....
In auto mode, it doesn't seem to want to. In manual mode, shifting up to a lower RPM gear seems to allow it to coast reasonably well.

Having said that, you're right - it never fully free wheels. It's not like popping a manual transmission car out of gear or pressing the clutch to remove the engine power.

I would assume the only real way to do that would be to actually place the Jeep in neutral, something that falls under the definition of coasting, which would be against the law where regulations prohibit it.

Of course, the odds of actually getting caught at it are slim, short of an accident that can be proven to have resulted from it.
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  #20  
Old 09-09-2015, 06:54 PM
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Re: Wind resistance or fish bite?

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Originally Posted by xjnewbie View Post
Mine definitely slows down if I just take my foot off the accelerator. I have not touched the brake pedal yet. There are a few traffic lights in my area that can be seen from quite a distance and some have a slight downgrade leading up to them. I prefer just to coast to the red light instead of racing there then jamming on the brakes. However, I feel that I have traffic riding my butt b/c I am slowing down way too soon. A quick tap on the + paddle shifter and I am cruising all the way to the light.

AND YES, the first day I had the GC I forgot (more accurately, didn't know at the time) to hold the + paddle for 2-3 seconds and it takes you out of manual mode for normal automatic trans operation to resume

I think you will find that if you "coast" and don't press the brake it will of course slow down (if flat or slightly uphill) BUT if you coast AND press the brake it will downshift more aggressively as it knows you are trying to slow down.

If you are going downhill (like me lol) and don't brake it will increase speed but if you brake, it will downshift. Brake again, it will downshift more.

That's how mine works and I like the logic of it.
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  #21  
Old 09-09-2015, 07:11 PM
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Re: Wind resistance or fish bite?

its the mds system
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  #22  
Old 09-09-2015, 10:56 PM
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Re: Wind resistance or fish bite?

On a CRD. Not.
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  #23  
Old 09-09-2015, 11:04 PM
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Re: Wind resistance or fish bite?

take the time to read the op's model, he clearly states a hemi


Quote:
Originally Posted by Ineedabiggerboat View Post
On a CRD. Not.
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  #24  
Old 09-09-2015, 11:05 PM
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Re: Wind resistance or fish bite?

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Originally Posted by Ineedabiggerboat View Post
On a CRD. Not.
The 5.7 is not a CRD. I believe that is what the OP has.


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