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  #37  
Old 10-18-2014, 07:24 PM
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Re: 9 speed transmission?

I have purchased more than 15 brand new vehicles almost everyone ordered. I have not had any problems except a 1978 corvette L82 4 speed that had a vibration and discovered all the flywheel bolts were not installed. I have not babied my Cherokee at all and the transmission works flawlessly. Full throttle acceleration , manual shifting, high speed etc...I was a little easy for the first 150 miles now I drive like it was meant to be driven. The only thing I question is the low speed crash mitigation. Asked the dealer if we could test another unit to see if it performed like mine and wasn't interested in the test. haha.

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  #38  
Old 10-18-2014, 07:37 PM
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Re: 9 speed transmission?

Quote:
Originally Posted by m_iOS_dev View Post
Gents,

The whole thread had made me wonder about this problem: how does one break in this tranny? The consensus seems to be that the first 500 miles are vital to its smooth operation, and potentially its longevity.

Suggestions?

OT, a photo of October in the Maritimes. Enjoy!Attachment 47737Attachment 47738Attachment 47739


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Follow the manual for break in and you will be fine. don't baby it, note the part below about doing full throttle acceleration

ENGINE BREAK-IN RECOMMENDATIONS
A long break-in period is not required for the engine and
drivetrain (transmission and axle) in your vehicle.
Drive moderately during the first 300 miles (500 km).
After the initial 60 miles (100 km), speeds up to 50 or
55 mph (80 or 90 km/h) are desirable.


While cruising, brief full-throttle acceleration within the
limits of local traffic laws contributes to a good break-in.
Wide-open throttle acceleration in low gear can be detrimental
and should be avoided.
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  #39  
Old 10-20-2014, 09:56 AM
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Re: 9 speed transmission?

If this 'break in' period is so critical, why don't the dealerships go over this before you take delivery. My dealer said nothing about break in. But the service write up guy at this same dealership also said that moving the shift lever to the left puts it in manual mode.
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  #40  
Old 10-20-2014, 10:10 AM
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Re: 9 speed transmission?

Quote:
Originally Posted by blk14altitude View Post
If this 'break in' period is so critical, why don't the dealerships go over this before you take delivery. My dealer said nothing about break in. But the service write up guy at this same dealership also said that moving the shift lever to the left puts it in manual mode.
You are giving dealerships too much credit for actually knowing about their product. I had to school my salesman, sales manager, dealership owner, and Chrysler zone rep about the Cherokee as well as how to order one. They didn't have a clue. My service manager asked me for the web address for Jeep Garage as he wanted to learn about the Cherokee. I am going to remind people one more time, people are used to the old automatics that did have a manual mode. The new 9 speed automatic in the Cherokee DOES NOT HAVE A MANUAL MODE. What it does have is a mode where you can define the top and bottom shifts. That is not the same thing as a manual mode. You can call that defining mode what ever makes you happy but technically it is not a manual mode. I think part of the problem is that there is another Cherokee web site that does not screen their information and is giving out bad information.
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  #41  
Old 10-20-2014, 10:20 AM
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Re: 9 speed transmission?

Quote:
Originally Posted by blk14altitude View Post
If this 'break in' period is so critical, why don't the dealerships go over this before you take delivery. My dealer said nothing about break in. But the service write up guy at this same dealership also said that moving the shift lever to the left puts it in manual mode.
Also, the information about the 9 speed transmission and how to drive it as well as break it in is in the full set of owner's manuals. You can get these delivered to you for free by calling Chrysler headquarters in Auburn Hills, Michigan. I do agree that these should be in the Jeep to begin with but at least they are available for the price of a phone call. Personally, I think part of the whole Jeep problem is that Chrysler has tried to make the Jeep all things to all people. It used to be that the Jeep was primarily sold to Jeep enthusiasts who knew their product inside out. Now days the Jeep is also sold to soccer moms, mall cruisers, and front wheel drive people who care more about mpgs then 4X4 performance. Not only has this confused the market/average customer, it has confused the dealers as well.
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  #42  
Old 10-20-2014, 09:49 PM
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Re: 9 speed transmission?

The jeep 9 speed automatic works just the same as any other manual mode in other automatics. You can limit the upper gear the transmission will max out to and it will shift up to that gear selected. you could actually do this to the others but they did not have 9 gears. I had a 67 GTO ram air 400 with the shift gate 1,2,3 Automatic, A 1970 SS 454 Chevelle 450 horse with the HD turbo hydromatic , a 2012 Cadillac 3.6 V6 6 speed and all shifted the same way. They wont downshift to a lower gear outside of the RPM limits but you can upshift through the gears and downshift. In the Chevelle I could put it in 2 and it would start in 1st shift to 2nd but not into 3rd. It limited the highest gear, only had 3 to pick from. LOL.
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  #43  
Old 10-20-2014, 11:38 PM
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Re: 9 speed transmission?

Quote:
Originally Posted by doogle View Post
The jeep 9 speed automatic works just the same as any other manual mode in other automatics. You can limit the upper gear the transmission will max out to and it will shift up to that gear selected. you could actually do this to the others but they did not have 9 gears. I had a 67 GTO ram air 400 with the shift gate 1,2,3 Automatic, A 1970 SS 454 Chevelle 450 horse with the HD turbo hydromatic , a 2012 Cadillac 3.6 V6 6 speed and all shifted the same way. They wont downshift to a lower gear outside of the RPM limits but you can upshift through the gears and downshift. In the Chevelle I could put it in 2 and it would start in 1st shift to 2nd but not into 3rd. It limited the highest gear, only had 3 to pick from. LOL.
Sorry, respectfully, we are going to have to agree to disagree.
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  #44  
Old 10-25-2014, 05:06 PM
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Re: 9 speed transmission?

My dealer said nothing about break in procedure. And that was even knowing I was driving back home 300 miles!
Basically its not their job, period. Its the consumer's job to read, read and read more.
But my salesperson did preset most of my u-connect and par the phone for me.
He also set and explained the Tech group to me. He went through Navigation with me and set "go home" for me.
I did read the manual on line before I picked up the vehicle.
So I knew not to exceed 50 for the first 60 miles and 50-55 for 300 miles. And other things.
I also knew that most of this was so not to overheat the system especially the gears and fluid. That is Trans and axle. Avoid stress on a new system and it will last longer.
So I did pull over 4 times on the way back just to let everything cool down.
I also went up to 1,000 miles before I really started pushing it.
Was it needed? It was my vehicle and I believe it was. Now at 6,000 miles I could not want anything more. MPGs at 70 mph are in the low 30's with a V6 and AD2.
The 9 speed is perfect now even with never getting any TSB's on a 12/11 build.
There is also the other philosophy of putting the peddle to the medal.
I can respect that as long as its the other persons vehicle.
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  #45  
Old 10-25-2014, 05:53 PM
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Re: 9 speed transmission?

well not constant pedal to the metal all the time but the 2015 manual specifically states that brief full throttle acceleration is beneficial to good break in. no better guide then the specific manual for the vehicle you buy.
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Old 10-26-2014, 01:34 AM
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@Jeepster910 - I followed break in process like you did. At 1400 miles 9 - speed is great. Maybe our attention to break in will pay off in long run. Good to hear yours is performing at 6K.

BTW, my 4-speed V8 pickup is feeling a little sluggish compared to the Cherokee and the pickup gets 17 mpg combined.
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  #47  
Old 10-26-2014, 07:35 AM
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Re: 9 speed transmission?

Quote:
Originally Posted by silvermax04 View Post
well not constant pedal to the metal all the time but the 2015 manual specifically states that brief full throttle acceleration is beneficial to good break in. no better guide then the specific manual for the vehicle you buy.
Correct!
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  #48  
Old 10-26-2014, 08:06 AM
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Re: 9 speed transmission?

Quote:
Originally Posted by Array View Post
@Jeepster910 - I followed break in process like you did. At 1400 miles 9 - speed is great. Maybe our attention to break in will pay off in long run. Good to hear your's is performing at 6K.

BTW, my 4-speed V8 pickup is feeling a little sluggish compared to the Cherokee and the pickup gets 17 mpg combined.
Its all in the gears............................... on this 9 speed I would guess.
I had a Grand Cherokee V8 before this Cherokee. This V6 Cherokee runs much lower RPMs on the highway than the V8 (4spd w/ OD) ever did.
What's interesting is at 70 mph my mpg is increasing and on my Grand (V8) it was decreasing. Something like 19 mpg (V8) vs 32+ on the V6 Cherokee. That's huge and likely a lot to do with the 9 speed.

The pay off will be there for us for sure. I just wish that Chrysler would put a wrap around on the visor or something to warn the customer of proper break in. I think it would save them a lot of grief. For some reason I think this Cherokee is susceptible to bad things if not broken in or stressed early on. I know differentials are very susceptible to damage with excessive heat and improper/damaged lube. I went through that with my 2001 Cherokee Sport w/off road pkg. The dealer used reg. axle lube instead of synthetic which was called for with the tow group. The only reason for that was heat produced when towing on those gears.
You have many, many good miles ahead for you with this great vehicle!
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