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-   -   Highway !!!!!!! (http://www.jeepgarage.org/f73/highway-41131.html)

Turmoil 04-23-2012 12:45 PM

Highway !!!!!!!
 
Hi everybody
I have wk2 v6 when i drive my vehicle at highway specialy at 160 km
The transmission down shifting to the 4th gear even if i turn on the speed cruise
Any one have same trouble

JRNYC 04-23-2012 03:42 PM

Re: Highway !!!!!!!
 
no no troubles like that in my 2012 Summit V6... She runs smooth at higher rpms... minimal downshifting... do you have it in "sport Mode" by chance? That might affect it?

Turmoil 04-23-2012 04:32 PM

Re: Highway !!!!!!!
 
it is in auto mode
so what is the solution
do you think it is need to some programing

Turmoil 04-23-2012 08:44 PM

Re: Highway !!!!!!!
 
any one have idea about that

gomaximo 04-23-2012 09:13 PM

Re: Highway !!!!!!!
 
160 Kph (100 mph):eek: here in US?

padgett 04-24-2012 08:06 AM

Re: Highway !!!!!!!
 
Quick thought is that ~100 mph the load is enough to engage PE and trigger a downshift.

Would need a scan tool to check throttle position and load % when it happens though.

I doubt the engineers considered a long term 100 mph cruise condition.

Molson 04-24-2012 08:53 AM

Re: Highway !!!!!!!
 
about a month ago I was in the middle of no where west oklahoma. I think there's fuel cut off at 105. they're not really made for much more than that. hemi has got some more juice and SRT-8 obviously. But that v6 is tapped out.

Turmoil 04-24-2012 05:13 PM

Re: Highway !!!!!!!
 
i will talk to the dealer about that

Yadkin 04-24-2012 06:21 PM

Re: Highway !!!!!!!
 
That's 100mph. From the OM:

Quote:

The transmission will automatically shift into the Overdrive gear if the following conditions are present:
  • the shift lever is in the DRIVE position,
  • vehicle speed is sufficiently high, and
  • the driver is not heavily pressing the accelerator.

They design this in to limit the top speed of the vehicle.

padgett 04-24-2012 08:42 PM

Re: Highway !!!!!!!
 
I think there is a cutoff at about 113 mph but is due to the tire rating, not the engine. I make 6000 in 3rd to be 125 mph & suspect if the cutout were removed it would reach that. Are pushing a barn door (cdA=12.8 sq ft ish) but know several large cars that have gotten there on half the hp.

Do believe the PLA required for 100 mph would be "heavily" enough to trip a downshift. The ton in 4th is barely half way through the rev range.


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