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KN09Patriot

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Discussion starter · #1 · (Edited)
Hello all!
I'm new here, and I'm a big fan of my 2009 Patriot. It's 4x4, has a little over 200k, and is in great shape for the most part...BUT it has the dreaded CVT automatic (without the crawler option). When I was looking at buying a Patriot 3 years ago, I wanted a 5spd (I've never owned an automatic vehicle in my life until this one), but couldn't turn this beauty down...so, alas, here I am now with transmission issues.
The symptoms: Once, about a year and a half ago, I was on a 4-hour road trip in WV and was hauling a** when my trans temp light came on. I pulled over and took a break for an hour, and when I hopped back in, all was well. I never had another instance like that again or other adverse symptoms, so I chalked it up to doing 80-90mph up 5% grades. Lately however, I began noticing that on hilly interstate trips at higher speeds, I'd start to hear a high pitched whine under acceleration after about 30-45 minutes of faster driving, so I'd back off the throttle a bit and all was well. Around town and during my daily 25 mile round-trip commute on 55mph roads, there were never any symptoms like that. I should also note that when this interstate "whine" first started happening, I checked my trans fluid in accordance with the charts, and the level, as well as the "look" and smell of it seemed perfectly fine. Then, a couple weeks ago, I let my wife borrow it while I was getting work done on her car and I received a panicked call that she's only able to do 35mph up the interstate with it floored. After immediately barking for her to back off the throttle and pull over, she made it to a gas station at 35-40mph under slightly increased throttle. When I went to pick her up 20 minutes later, the Jeep didn't want to move very easily - out of the inclined parking spot it was in where she'd arrived. So, I left it for the day and went back the next day to re-check the fluid (on level ground, of course). All was still well, and it didn't smell burnt - surprisingly. Additionally, to my amazement, after plotting the flattest route back home, I was able to drive it 25+ miles through a couple towns and even on a 55mph road (at speed) with no issues - BUT, I was intentionally keeping the revs low. When I finally got within sight of my house on a flat"ish" road, I floored it, and while it did "try" to accelerate, it had drastically less acceleration than it normally would have been under the same conditions. Since then, I've driven it a few miles at a time at low RPM's, basically to keep the tires round and run the engine. Under these conditions, it runs perfectly fine, and you'd never know anything was wrong. Despite this, ALL of the transmission shops I call say, "Bad transmission...you'll need to replace it." as soon as they hear the three initials "CVT" come out of my mouth. However, after reading some threads and describing the symptoms to my mechanic buddy, I'm beginning to wonder if it's just a bad torque converter.
So...long story even longer...My question to the fellow Patriot aficionados (and hopefully experts) on this site is...based on your ACTUAL experiences and knowledge, do you think it's the transmission, or just a bad torque converter that I have? I'm trying to decide whether to sell it cheap or repair it, and I'm REALLY hoping for the latter option if possible. But, I can't justify a $2,300 USED transmission replacement job on a vehicle that's only worth ~$4k in its entirety. Thanks in advance for the help!!
 
First, welcome and congrats on 200k!

The CVT fluid and filters should be changed every 30-50k depending on driving conditions, not 60-120k like the manual suggests. If the fluid hasn't been changed in the last 50k, consider doing that first.
When you drop the pan, if it's filled with tons of big metal bits (think glitter) then you know you've got problems. If it's just black and thick, you might be ok with a fluid and filter change.
There are other parts of the CVT cooling system that can restrict fluid flow and contribute to overheating/whine like the bypass valve, and since you have a 2009 you'll also have the "soup can" oil to water heat exchanger bolted to the side of the trans that can clog due to dirty fluid.

More info here:
 
Discussion starter · #3 ·
First, welcome and congrats on 200k!

The CVT fluid and filters should be changed every 30-50k depending on driving conditions, not 60-120k like the manual suggests. If the fluid hasn't been changed in the last 50k, consider doing that first.
When you drop the pan, if it's filled with tons of big metal bits (think glitter) then you know you've got problems. If it's just black and thick, you might be ok with a fluid and filter change.
There are other parts of the CVT cooling system that can restrict fluid flow and contribute to overheating/whine like the bypass valve, and since you have a 2009 you'll also have the "soup can" oil to water heat exchanger bolted to the side of the trans that can clog due to dirty fluid.

More info here:
Hi Sandstone! Thanks for the reply! If I do drop the pan and find "glitter", you think t's definitely the trans-replacement option that'll be required, then? No chance of a torque converter issue if I don't find glitter, though?

Also, I see that Rock Auto sells a "Master Rebuild Kit" for the transmission (P/N MRK12500), but I think a trans shop willing to rebuild one is next to impossible to find here in VA.
 
Discussion starter · #4 ·
First, welcome and congrats on 200k!

The CVT fluid and filters should be changed every 30-50k depending on driving conditions, not 60-120k like the manual suggests. If the fluid hasn't been changed in the last 50k, consider doing that first.
When you drop the pan, if it's filled with tons of big metal bits (think glitter) then you know you've got problems. If it's just black and thick, you might be ok with a fluid and filter change.
There are other parts of the CVT cooling system that can restrict fluid flow and contribute to overheating/whine like the bypass valve, and since you have a 2009 you'll also have the "soup can" oil to water heat exchanger bolted to the side of the trans that can clog due to dirty fluid.

More info here:
Also...when you say filter(s), please advise. I only see the sump filter on Rock Auto. Where/what are the others? Thanks in advance for the info!
 
Hi Sandstone! Thanks for the reply! If I do drop the pan and find "glitter", you think t's definitely the trans-replacement option that'll be required, then? No chance of a torque converter issue if I don't find glitter, though?

Also, I see that Rock Auto sells a "Master Rebuild Kit" for the transmission (P/N MRK12500), but I think a trans shop willing to rebuild one is next to impossible to find here in VA.
If it's been making serious metal then a rebuild/replacement is likely in the near future. I doubt it's the TC but I could be wrong. The good part is that it still moves, and apparently doesn't "judder" and/or clunk on take-off, so maybe you'll get lucky and a fluid/filter service will take care of it for now.


Also...when you say filter(s), please advise. I only see the sump filter on Rock Auto. Where/what are the others? Thanks in advance for the info!
There's a small paper filter inside the trans under the soup can, very important to change this. Check out the link I posted above. :)

93148
 
Discussion starter · #6 ·
Also...when you say filter(s), please advise. I only see the sump filter on Rock Auto. Where/what are the others? Thanks in advance for the info!
I know we've never met, but you don't know who you're talking to in reference to "luck". LOL.
If it's been making serious metal then a rebuild/replacement is likely in the near future. I doubt it's the TC but I could be wrong. The good part is that it still moves, and apparently doesn't "judder" and/or clunk on take-off, so maybe you'll get lucky and a fluid/filter service will take care of it for now.




There's a small paper filter inside the trans under the soup can, very important to change this. Check out the link I posted above. :)

View attachment 93148
Awesome...Thank You Again for all the info!! Also, I know we've never met, but you don't know who you're talking to in reference to "luck", Lol!...I'll keep my fingers crossed, though!
 
Ah, I see.

Just the same, if it managed 200k on original fluid and filters that's pretty darn good......as in almost unheard of.

Also, these guys might be able to help you find a "CVT qualified" shop in your area, should you need one:
 
I had a similar issue a few years back...trans temp light came on twice on 2 different interstate drives. i don't remember it having an issue with accelerating, though. After doing a little digging I decided to do the fluid/filter change. I'd owned it for maybe a year and a half at that point and it was around 120k (i bought it at 100k) so figured that would be the easiest thing to try first, and it hasn't happened since. instead all the bearings on the pulleys decided to crap out at the same time ha! mines a 2010 CVT
 
Discussion starter · #11 ·
Thanks Sandstone and Grease Gal for your insight and replies! Unfortunately, being a one-man tool & die machine shop owner (with little/no time to spend on figuring out the problem - or waiting on a new trans to be installed), I've decided to cut my losses and get something else (2014 Grand Cherokee). I have posted it on the "Outpost" page if you know of anyone who is looking for a great Patriot - other than having transmission issues.
 
Discussion starter · #12 ·
I had a similar issue a few years back...trans temp light came on twice on 2 different interstate drives. i don't remember it having an issue with accelerating, though. After doing a little digging I decided to do the fluid/filter change. I'd owned it for maybe a year and a half at that point and it was around 120k (i bought it at 100k) so figured that would be the easiest thing to try first, and it hasn't happened since. instead all the bearings on the pulleys decided to crap out at the same time ha! mines a 2010 CVT
Thanks Grease Gal for your insight and replies! Unfortunately, being a one-man tool & die machine shop owner, I've decided to cut my losses and get something else (2014 Grand Cherokee). I have posted it on the "Outpost" page if you know of anyone who is looking for a great Patriot - other than having transmission issues.
 
Discussion starter · #13 ·
Ah, I see.

Just the same, if it managed 200k on original fluid and filters that's pretty darn good......as in almost unheard of.

Also, these guys might be able to help you find a "CVT qualified" shop in your area, should you need one:
Thanks Sandstone for your awesome insight and replies! Unfortunately, being a one-man tool & die machine shop owner (with little/no time to spend on figuring out the problem - or waiting on a new trans to be installed), I've decided to cut my losses and get something else (2014 Grand Cherokee). I have posted it on the "Outpost" page if you know of anyone who is looking for a great Patriot - other than having transmission issues. Thank you SO MUCH once again!!
 
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