Hill Start Assist & Hill Descent Control Operation Video - JeepForum.com
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post #1 of 7 Old 04-08-2020, 05:32 PM Thread Starter
SteveROntario
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Location: Ottawa Valley
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Hill Start Assist & Hill Descent Control Operation Video

This appears to be for 2008+ model years only. I found you had to press the brakes quite firmly to get the Hill Start Assist to kick in.


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2013 Civic, 2009 Suzuki DRZ-400SM, 2008.5 Grand Cherokee CRD, 1991 Dodge B250, 1934 Hupmobile 417W
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post #2 of 7 Old 04-08-2020, 08:00 PM
Brit30-06
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Location: Leeds
Posts: 275
Hi Steve
Thanks for the video. That is the first time that I have ever seen the system demonstrated.
In uk this was only available on the facelifted Grand Cherokee.

For those that are not aware of this HDC the following is from the manual.

The HDC speed may be adjusted by the driver to suit the
driving conditions. The speed corresponds to the transmission
gear selected.
1st = 1 mph (1.6 km/h)
2nd = 2.5 mph (4 km/h)
3rd = 4 mph (6 km/h)
4th = 5.5 mph (9 km/h)
5th = 7.5 mph (12 km/h)
Reverse (R) = 1 mph (1.6 km/h)
Neutral (N) = 2.5 mph (4 km/h)
Park (P) — HDC will not function
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post #3 of 7 Old 04-08-2020, 10:04 PM Thread Starter
SteveROntario
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No problem, it was interesting to try out. It all made sense but it was counter intuitive to have to downshift in order to upshift. I knew I was in 1st gear but I still had to downshift from D into 1st before going up to 2nd.
It would be interesting to see somebody use it on a hill where the tires were having trouble maintaining traction.

2013 Civic, 2009 Suzuki DRZ-400SM, 2008.5 Grand Cherokee CRD, 1991 Dodge B250, 1934 Hupmobile 417W
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post #4 of 7 Old 04-09-2020, 03:57 PM
sc32valve
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Great video! But what I really want to know, is what type of maintenance you've done to have it drive so nice and quiet with 277k km on it. Sounds brand new. No bangs in the gear shift, 4 low engages beautifully, what's your secret? Have you done the oil cooler seals?
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post #5 of 7 Old 04-10-2020, 07:45 AM
Brit30-06
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2008 WK 
 
Join Date: Feb 2016
Location: Leeds
Posts: 275
Quote:
Originally Posted by SteveROntario View Post
No problem, it was interesting to try out. It all made sense but it was counter intuitive to have to downshift in order to upshift. I knew I was in 1st gear but I still had to downshift from D into 1st before going up to 2nd.
It would be interesting to see somebody use it on a hill where the tires were having trouble maintaining traction.
Hi Steve
Wait until the cv19 restrictions are lifted and then go find a serious hill. You live in Canada surely you will not be far from one
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post #6 of 7 Old 04-10-2020, 08:18 AM
LouC
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2007 WK 
 
Join Date: Feb 2008
Location: NY
Posts: 2,876
Quote:
Originally Posted by SteveROntario View Post
This appears to be for 2008+ model years only. I found you had to press the brakes quite firmly to get the Hill Start Assist to kick in.
https://www.youtube.com/watch?v=Z--Iel47k_s
Very interesting, I didn't know they added that to the 08+ WKs...
I could see that possibly being useful on boat ramps launching and retrieving boats...
My son's '17 JK Unlimited with the 6 spd manual trans has a similar system to keep the vehicle from rolling back when stopped at a light, he has it turned off but it is there....

2017 JK Unlimited Sport 6 spd
2007 WK Limited Hemi QDII
1998 ZJ Laredo 4.0 Selectrac
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post #7 of 7 Old 04-10-2020, 01:03 PM Thread Starter
SteveROntario
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Quote:
Originally Posted by sc32valve View Post
Great video! But what I really want to know, is what type of maintenance you've done to have it drive so nice and quiet with 277k km on it. Sounds brand new. No bangs in the gear shift, 4 low engages beautifully, what's your secret? Have you done the oil cooler seals?
It got the Jeep out of downtown Toronto with about 177k km on it two and a half years ago. I had it safetied and I started running it for 1000 km a week and quickly found out which parts needed to be replaced.
  • Front Wheel Bearings
  • Front propeller shaft (nearly new OEM)
  • Front driver side CV shaft (unknown age OEM)
  • Front differential (nearly new)
  • NAG 1 transmission conductor plate
  • Jeeperf soft front differential mount
  • PolyPro upper differential mounts
  • Master cylinder & Booster
I was getting a lot of transfer case codes in the past regarding the internal brake but they seem to have stopped coming in? I am driving a lot less since the New Year so now I need to find a way to preserve the chassis now.

2013 Civic, 2009 Suzuki DRZ-400SM, 2008.5 Grand Cherokee CRD, 1991 Dodge B250, 1934 Hupmobile 417W
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