At wits end with this 'jeep' - CVT Overheating - Jeep Patriot Forums
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post #1 of 29 (permalink) Old 05-08-2017, 10:15 AM Thread Starter
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At wits end with this 'jeep' - CVT Overheating

I've about had it with this Patriot.

Took it for what was supposed to be a nice family weekend trip down to Colorado Springs (form Denver) and we barely get to Castle Rock and the damn transmission temp light comes on and kills power while we're in the middle of i25 traffic! We made it the rest of the way with having to take 10 minute cool down stops every 20 minutes.

This happened last summer and I replaced the CVT fluid and filter.

I can't stand having a vehicle that only runs in the winter and is a hazard to drive in the summer. Trying to get to the side of the road in a 75MPH zone while only being allowed to use 1/4 throttle is UNSAFE!


I'm thinking the diverter is shot, but at this point I'm thinking of just bypassing the stock cooler (cooling in the HOT ac condenser is the stupidest idea) and going with a large aftermarket trans cooler mounted in front.


It'd be nice if the factory trans cooler was in the radiator like every other vehicle ever made, that would take care of keeping it warm enough in the winter and actually allow it to cool in the summer.

Ugh.

Last edited by Charles Kline; 05-08-2017 at 01:41 PM. Reason: Title update
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post #2 of 29 (permalink) Old 05-08-2017, 10:34 AM
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Hey - Just curious what your model is? I know I've read that older Patriots had issues with highway overheating but those had been 'resolved' thru recalls, etc

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post #3 of 29 (permalink) Old 05-08-2017, 10:43 AM Thread Starter
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2007 2.4L CVT with low gear.
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post #4 of 29 (permalink) Old 05-08-2017, 10:48 AM
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Quote:
Originally Posted by Charles Kline View Post
2007 2.4L CVT with low gear.
Might want to check with the dealer - I know this problem affected pre-2010 models (though honestly I can't remember which exactly) which almost prevented me from buying my 2011 until I saw the problem had been resolved on never models.

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post #5 of 29 (permalink) Old 05-08-2017, 11:23 AM
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It was never "resolved". I own a 2014 FDII with the CVT and had the trans overtemp light with less than 30K. I had the fluid and filters changed at the dealership and the problem has not recurred for me. They also said they updated the PCM software when they did the fluid and filter change. When I had the issue driving at highway speeds for more than 20 minutes with an outside air temp over 80 degrees F, would result in the trans overheating.
A lot of people have had issues with the CVT. And it is completely a Chrysler problem. The same CVT is used in Mitsubishi, Hyundai, Kia, Nissan, and some Subaru models without issues. Chrysler has from the start refused to accept any liability for their programming and implementation and likely never will. It's unfortunate, because the Patriot is an almost perfect vehicle in every other respect.

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post #6 of 29 (permalink) Old 05-08-2017, 11:29 AM Thread Starter
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Originally Posted by DangerAaron View Post
It was never "resolved". I own a 2014 FDII with the CVT and had the trans overtemp light with less than 30K. I had the fluid and filters changed at the dealership and the problem has not recurred for me. They also said they updated the PCM software when they did the fluid and filter change. When I had the issue driving at highway speeds for more than 20 minutes with an outside air temp over 80 degrees F, would result in the trans overheating.
A lot of people have had issues with the CVT. And it is completely a Chrysler problem. The same CVT is used in Mitsubishi, Hyundai, Kia, Nissan, and some Subaru models without issues. Chrysler has from the start refused to accept any liability for their programming and implementation and likely never will. It's unfortunate, because the Patriot is an almost perfect vehicle in every other respect.
I wonder if Chrysler was the only manufacture to cool it with the AC condenser (which gets HOT in the summer)

Sounds like they reprogrammed it not reduce throttle if the temp goes high - or moved the set point to a higher temp. While that would make it safer to drive, it wouldn't help with the high temp issue...
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post #7 of 29 (permalink) Old 05-08-2017, 12:52 PM
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Quote:
Originally Posted by Charles Kline View Post
I wonder if Chrysler was the only manufacture to cool it with the AC condenser (which gets HOT in the summer)

Sounds like they reprogrammed it not reduce throttle if the temp goes high - or moved the set point to a higher temp. While that would make it safer to drive, it wouldn't help with the high temp issue...
I don;t know what their "update" that they installed did exactly. But what I can say is that whenever the CVT starts to get hot you can hear it. The lfuid pump that is part of the transmission will start to whine. When the trans finally overheats, the whine is very pronounced. When I was having the issue, I would be able to hear the whine and know I was going to get the trans over-temp light before it lit up on my dash. The noise is because the fluid will "foam" when it gets hot. this more or less causes the fluid pump to cavitate, making the "whine" noise. Since I had it serviced, I have not heard any perceptible whine noise from my CVT. That tells me it is functioning correctly at this point in time. How long that will last???? Anyone's guess. But I don;t think their update simply moved a set point or removed the throttle limitation. If so, the trans would still be getting hot, but not indicating, and that would cause failure.

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post #8 of 29 (permalink) Old 05-08-2017, 01:44 PM Thread Starter
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That makes sense about the wine, ours for sure makes the same sound and is at its loudest right before throwing the light and robbing throttle control. It would be nice to know exactly what the 'improved driveability' programming does.
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post #9 of 29 (permalink) Old 05-08-2017, 03:09 PM
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Quote:
Originally Posted by DangerAaron View Post
It was never "resolved". I own a 2014 FDII with the CVT and had the trans overtemp light with less than 30K. I had the fluid and filters changed at the dealership and the problem has not recurred for me. They also said they updated the PCM software when they did the fluid and filter change. When I had the issue driving at highway speeds for more than 20 minutes with an outside air temp over 80 degrees F, would result in the trans overheating.
A lot of people have had issues with the CVT. And it is completely a Chrysler problem. The same CVT is used in Mitsubishi, Hyundai, Kia, Nissan, and some Subaru models without issues. Chrysler has from the start refused to accept any liability for their programming and implementation and likely never will. It's unfortunate, because the Patriot is an almost perfect vehicle in every other respect.
Hey Aaron,

I'm sorry this was not resolved for you. If there's anything further we can assist with or document on our end for you, please feel free to PM your VIN at any time.

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post #10 of 29 (permalink) Old 05-08-2017, 03:23 PM Thread Starter
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Originally Posted by JeepCares View Post
Hey Aaron,

I'm sorry this was not resolved for you. If there's anything further we can assist with or document on our end for you, please feel free to PM your VIN at any time.

Kori
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The problem has not been resolved for any one and its a moot point now that Patriots are no longer in production. Just a lot of owners with CVT that are stuck with a terrible cooling design.

(Also might want to re-read his comment [he's not the thread starter] He said he has not had the issue return)
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post #11 of 29 (permalink) Old 05-08-2017, 03:27 PM Thread Starter
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From looking the repair manual and threads on here, do I have this right?

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post #12 of 29 (permalink) Old 05-08-2017, 05:28 PM
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The problem has not been resolved for any one and its a moot point now that Patriots are no longer in production. Just a lot of owners with CVT that are stuck with a terrible cooling design.

(Also might want to re-read his comment [he's not the thread starter] He said he has not had the issue return)
Charles, the offer is the same for you as well. We don't necessarily reach out only to thread starters, and I'm sorry I did not include you.

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post #13 of 29 (permalink) Old 05-09-2017, 10:36 AM Thread Starter
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No worries Kori, We all appreciate you being here. I'm sure you get hit with a lot of frustration from folks, sorry to add to that.

-Charles
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post #14 of 29 (permalink) Old 05-09-2017, 11:28 AM
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Did you take it to a dealership to get the transmission fluid changed? I wouldn't trust anyone but the dealership to do the transmission fluid changing. I had this problem happen to me last year but after I immediately took it to the dealer and told me to show me the old filter and fluid from my jeep (making sure they did the work) I haven't had any problems even on days 100F+
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post #15 of 29 (permalink) Old 05-09-2017, 11:39 AM
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The trans cooler on the fdII is a full-sized separate unit in front of the condensor, and it's the largest of the bunch. You should get it checked at the dealer and make sure the thermostat is functioning properly.

Anecdotal, but I have pulled an 18 ft bowrider at highway speeds and have never had an overheating issue on my FDII.

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bad design, cvt overheat, transmission cooler, transmission failed, transmission temp

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