Losing Hope in the 9 Speed, Even Honda Can't Get it Right - Page 2 - 2014+ Jeep Cherokee Forums
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post #11 of 37 (permalink) Old 04-28-2017, 07:14 AM
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The 9 speed in my 2014 has been great even with the few quirks I get on occasion. That is especially true with the 3/2 downshift or should I say the lack of. The way I look at it is my '04 Grand Cherokee V8 in overdrive would run 21-2200 rpm at 65-70mph.
This Cherokee 3.2 in 8th runs 1700 rpm or a bit more at the same speeds. The difference is 10 mpg between the two vehicles. That still amazes me and is mostly in the transmission's use of 8th gear to lower those rpms.
If I keep it to 65 or under, low 30's are the norm. If I use 100% gas it usually goes up another 1.5-2 mpg.
With a Max Care life I'll get the new hardware equipped transmission if this one gives up the ghost for $100. The 9 speed has been great though problematic early on, especially the 2014 and early 2015's.
I guess I have been lucky to date.
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post #12 of 37 (permalink) Old 04-28-2017, 07:27 AM
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I have had zero issues with mine, also. My aFe CAI has solved the issue of hesitation at takeoff. Thus, I perceive the hesitation issue to be a throttle issue and has nothing to do with the transmission. Honda initially used the 9 speed in some Acura models, and had the same issues with the transmission that Jeep did with the 2014 models.
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post #13 of 37 (permalink) Old 04-28-2017, 12:09 PM
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Originally Posted by dhh3 View Post
I have had zero issues with mine, also. My aFe CAI has solved the issue of hesitation at takeoff. Thus, I perceive the hesitation issue to be a throttle issue and has nothing to do with the transmission. Honda initially used the 10 speed in some Acura models, and had the same issues with the transmission that Jeep did with the 2014 models.
I've been considering getting the afe CAI for mine, as I know throttle response will improve, so will sound, and just maybe a slight uptick in mileage. Mostly though, throttle response, and better sound.

And like I said, I might consider upgrading to the newer hardware transmission if it decides to go, but I don't have Maxcare life as I only got the car when it had 51k miles on it, and that ends at 48k miles/2 years. I'm not going to fret too much though since about half my driving it for work, so I'll be getting a lot of money in expenses over time, which could easily pay for any of the wear and tear items.

I figured since I did not opt for the extended warranty either (which at the time I bought the car, the price would've been $2658. expensive, I know), so I figured the money I could've used for the warranty, I'll use as my repair fund for any major items. My expenses for work will be for wear and tear items. And yes, I will be keeping track of all that.
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post #14 of 37 (permalink) Old 04-28-2017, 01:53 PM Thread Starter
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Low gear up-shifts are my biggest complaint. It's smooth if you're putting your foot into it which I mostly do when driving alone. The problem is when I have passengers that I don't want to frighten. Lower RPM up-shifts in 1-3 and sometimes 4 are just downright jerky sometimes. Any up-shifts below 2500 rpm are just not smooth. Have been starting to feel clunky down-shifts while decelerating also. I test drove a 2017 and it behaved the exact same way. Although it was very low miles so transmission probably had very little adaptive learn data.
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post #15 of 37 (permalink) Old 04-28-2017, 02:15 PM
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I see you guys are talking about CAI helping with the lag of these transmissions, I wonder if adding a sprint booster would help even more?
In case your wondering what this does:
https://www.sprintboosterusa.com
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post #16 of 37 (permalink) Old 04-28-2017, 02:17 PM
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Originally Posted by JoeTHcherokee View Post
I see you guys are talking about CAI helping with the lag of these transmissions, I wonder if adding a sprint booster would help even more?
In case your wondering what this does:
https://www.sprintboosterusa.com
That reeks of gimmick.
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post #17 of 37 (permalink) Old 04-28-2017, 02:27 PM
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I have gotten so used to having 9 gears that I think I would always miss it if I went back to a 5 or 6 gear.

However, with this many gears, you can't get the best driveability by letting the computer always decide when to shift. I have gotten very used to popping it into ERS mode and telling it which gear I want to be in.

We also got my fiancé a Renegade, so I have a chance to compare operation of the 9speef across models and model years. I like how the transmission is implemented in the Renegade even bette than in the Cherokee. It seems to be a bit more responsive, and manual mode is a true real manual mode. You select a gear, and the transmission shifts and stays in that gear. Very predictable performance this way, and you can always get into 9th if you want, you just start losing speed it conditions aren't not right for it.
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post #18 of 37 (permalink) Old 04-28-2017, 02:45 PM
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Originally Posted by sport_4x4 View Post
I have gotten so used to having 9 gears that I think I would always miss it if I went back to a 5 or 6 gear.

However, with this many gears, you can't get the best driveability by letting the computer always decide when to shift. I have gotten very used to popping it into ERS mode and telling it which gear I want to be in.

We also got my fiancé a Renegade, so I have a chance to compare operation of the 9speef across models and model years. I like how the transmission is implemented in the Renegade even bette than in the Cherokee. It seems to be a bit more responsive, and manual mode is a true real manual mode. You select a gear, and the transmission shifts and stays in that gear. Very predictable performance this way, and you can always get into 9th if you want, you just start losing speed it conditions aren't not right for it.
More gears is apparently all the rage these days, but there are some practical reasons for it. Car manufacturers need to comply with stricter fuel standards now, and one of the ways they know they can do that without making many modifications to the engines themselves is through the transmission, and that is by giving it more gears.

Take a standard 6-speed transmissions, and compare that to the more recent 8 or 9 speed variants, and you'll likely see anywhere from 2-5mpg increase in fuel economy on the highway, which is huge. The trouble though with all these gears is complexity, so there's more to go wrong if something should go wrong, and it doesn't help that because the KL is a transverse-mounted engine, the transmission is space-starved compared to the 8-speed ZF in the Grand Cherokee. This added complexity, and lack of conventional means with all the clutches, and extra gears can certainly add to more potential problems, as many of us have all experienced. I don't however think the ZF9 is a fragile engine as some have said in the past. It's just finicky at times, but I think it's plenty durable to handle anything you throw at it.

And now, we have the new 10-speed transmission in Fords and GMs, which I've heard is quite good. One example is you can be in 10th gear, and if you floor it, it'll automatically downshift to maybe 5th gear for maximum performance. It's the same thing as downshifting from maybe 6th gear into 4th. Guess those transmissions can do that from my understanding.

But as we get better and better hybrids, and electric cars, the idea of a transmission might seem more of something in the past, as the proper old-fashioned manual transmission is now becoming. I'm actually surprised FCA hasn't implemented a hybrid Jeep yet, because that could turn out to be interesting. Unless of course FCA wants to have more diesel engines across the lineup (which they should to be honest. Why FCA haven't put the 3.0 ecodiesel in the Wrangler is beyond me).
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post #19 of 37 (permalink) Old 04-28-2017, 03:48 PM
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I remember when we got my wife's Mercedes GLK350 with the snazzy 7-speed tranny. I thought that was crazy! But that's the smoothest-shifting tranny I have ever had the pleasure of driving. It does, however, require very frequent maintenance, which is not cheap.

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post #20 of 37 (permalink) Old 04-28-2017, 04:04 PM
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That reeks of gimmick.
$269 for the Cherokee. I'd spend it on a CAI!
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