Hesitation when accelerating - Page 3 - 2014+ Jeep Cherokee Forums
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post #21 of 27 (permalink) Old 04-14-2017, 10:46 PM
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Originally Posted by Jeepster1 View Post
On a 2015, as yours, it depends on your build date. I believe it was mid 2015 production that FCA started to use the new hardware equipped transmission. If you had the older style transmission you would not have 2nd on the downshift. 2nd was removed on the older transmissions for durability issues as part of the RO1 and for me it was a May 2014 required update that removed it. All those TSB's are based on VIN number. If your VIN falls after production date on the new hardware transmission then you would have gotten the appropriate software to allow 2nd.
If you have the old hardware equipped transmission there is actually no way you will have 2nd. The only way in reality to have retained it is to never had an update.
So obviously you have the newer hardware transmission. If not I need to know the secret TSB that returns 2nd on an older hardware trans.
My build date is 10/2014. I bought mine in 12/2014, so it is impossible that mine was build in mid 2015.

I believe another forum member Array, has the same build date as mine, and have experienced the dame thing.

If you follow the discussions around R01, the first Rev seems to have taken out the 2nd gear, but by Rev C, they have put back the 2nd gear. Then I got S55, and still have my 2nd gear.
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Last edited by Robo606; 04-14-2017 at 10:49 PM.
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post #22 of 27 (permalink) Old 04-15-2017, 12:47 AM Thread Starter
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Well, I bought mine in November 2013, so I guess I am screwed. I just got it back from the shop today and they said they did two flashes... but I haven't driven it enough to see if there is any difference in the hesitation. Those of you that got new transmissions, how difficult was the process? I would really prefer to avoid a long drawn out process of 10+ visits to the dealer in order to actually get it fixed. It seems like Chrysler is not really jumping to replace them unless you put in a lot of effort and complaints. Honestly, aside from the hesitation and my crappy mpg I really love the vehicle, I just worry about safety at the moment with a kid in the back. I will update once I get a chance to drive it a bit more.
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post #23 of 27 (permalink) Old 04-15-2017, 12:56 AM
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Quote:
Originally Posted by DarkHawk Down View Post
Hook up an OBD2 code reader and see if you get P0810. I did. The jeep gave me no warning but it has an error code. Clutch position module which is definitely crucial to the transmission. I took it in to the dealer and they confirmed it but said it wasn't a driveability issue. I have an appointment for May 3rd to fix it.
I'll be curious to see what they actually do and if it resolves the issue. I haven't taken mine in because it'a not super easy to reproduce, but I'll check fo this code.

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post #24 of 27 (permalink) Old 04-18-2017, 11:14 AM Thread Starter
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I got my Jeep back from the shop on Friday. I have been monitoring the downshifts and acceleration since then. It is definitely skipping second gear when decelerating, and the hesitation is still there, so no changes at all in the hesitation. It bucked pretty hard this morning when leaving for work. So what should I do now? Take it back to the shop or should I be opening a case with chrysler?
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post #25 of 27 (permalink) Old 04-20-2017, 02:01 AM
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This transmission issue happened to my daughter last night after taking off from a stop sign. My daughter saw some dash lights turn on but doesn't know for sure if it was a CEL. The CEL was off when I took the Jeep to the dealer, I'm hoping they could still diagnose and fix. Jeep has a cold air intake and runs on top tier gas.

The hesitation always occurs after coming out from a reverse.
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post #26 of 27 (permalink) Old 04-20-2017, 01:24 PM
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Originally Posted by Jeepster1 View Post
On a 2015, as yours, it depends on your build date. I believe it was mid 2015 production that FCA started to use the new hardware equipped transmission. If you had the older style transmission you would not have 2nd on the downshift. 2nd was removed on the older transmissions for durability issues as part of the RO1 and for me it was a May 2014 required update that removed it. All those TSB's are based on VIN number. If your VIN falls after production date on the new hardware transmission then you would have gotten the appropriate software to allow 2nd.
If you have the old hardware equipped transmission there is actually no way you will have 2nd. The only way in reality to have retained it is to never had an update.
So obviously you have the newer hardware transmission. If not I need to know the secret TSB that returns 2nd on an older hardware trans.
Obviously, I have the older (and likely original) transmission, and the only way I know to get into 2nd gear normally is I'm setting off from a complete stop, so the car is in 1st gear, and then it'll shift into 2nd, and then 3rd, and so on. Obviously, if I have it in snow mode, it starts in 2nd gear, so it'll downshift into 2nd gear it sounds like, although I haven't used it in a couple months since no accumulation. You could always manually downshift from 3rd to 2nd, and that could work, but if I understand correctly, under normal conditions, unless you're pretty much at a complete stop, it won't downshift into 2nd, and just go straight to 1st from 3rd gear.

It's an interesting "fix" for something that should've been replaced from the factory as a defect, and so a recall on the older transmissions. I know there was the recall with the car going into neutral at a stop, and a few others (which mine is all caught up on), but I'm surprised the older hardware wasn't just replaced for everyone. It's obvious it is likely FCA just trying to save a few pennies.
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post #27 of 27 (permalink) Old 04-30-2017, 10:27 AM
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My experience is that is you slow down your vehicle to a crawling speed (but not completely stop), and then try to accelerate. If you accelerate with a light pedal, then it will stay in 3rd gear and speed up smoothly. But if you really press down on the gas, then it will try to downshift to the 2nd, and that's when the hesitation occurred.

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