I have a 2013 Patriot 2WD. Transmission went out and I bought a used one, replaced, changed all filters, filled with AMSOIL, level is correct, added extra cooler. Once on the road, it seemed to "hunt" for the right ratio. Feels like what a normal gear transmission would feel like if after you pulled out slowly and it would shift all the way to drive too quickly and then downshift, upshift, and then down shift again. I had it flashed at dealer after I changed the tranny. Just decided to drive. Well this week, it started dying at stops, and randomly going into limp mode. Never a hot tranny light until last night. This is my nieces car. The jeep tranny high temp light came on. Not a hot day at all, probably in the 40s here. She made it off the road, let it cool down and got on in with it. I drove it last night and seemed to run fine except the "quick shift" and hunting for a gear. No tranny codes. Is this a transmission problem or a TCM issue? I am about tired of throwing money at this thing. Great car in awesome condition, except the tranny. IDEAS?
Haney
Hard to say without any codes.
Random stalls without codes have been caused by a bad crankshaft position sensor or related wiring.
Hunting for ratios may be a transmission issue. Putting in a used CVT is a gamble.
On the overheating, maybe the bypass valve on side of the transmission (pic below) isn't working right and not allowing fluid to circulate to the cooler.
![Image]()
Random stalls without codes have been caused by a bad crankshaft position sensor or related wiring.
Hunting for ratios may be a transmission issue. Putting in a used CVT is a gamble.
On the overheating, maybe the bypass valve on side of the transmission (pic below) isn't working right and not allowing fluid to circulate to the cooler.
If you have an android device and a OBDII adapter you could try downloading a copy of CVTz50 - CVT diagnostics with ELM327 to check the transmission internal pressures and compare them to the chart on link below:
www.sonnax.com
CVT Success: In-Vehicle Isolation of Common Problems
All transmission models have unique problems that are common to that model; Jatco CVT units are no exception. Technicians are facing an uphill battle when it co
I freely admit that @Sandstone knows far more than I do about Patriots (he is a great resource for our site!). However, I greatly fear that your replacement tranny is no better than the failed one you started with. The symptom you describe "gear hunting," is an impossible situation in a CVT, because it doesn't have any gears. I suspect what you're feeling is the transmission slipping.
A lot of Patriots are in junkyards because of failed transmissions. It's not so much the fault of the owner, nor the transmission -- the fault lies with the owners manual: the maintenance schedule is OTL. CVT fluid and filters should be changed at least twice as often as the owners manual recommends. Owners who follow the recommended schedule end up with a failed transmission. I know, because I was one of those owners.
I suggest you get a factory rebuilt transmission, and not a used transmission because most CVTs have suffered from inadequate maintenance. If properly maintained, a CVT is as good as any. Sadly, few have gotten the maintenance they should have.
A lot of Patriots are in junkyards because of failed transmissions. It's not so much the fault of the owner, nor the transmission -- the fault lies with the owners manual: the maintenance schedule is OTL. CVT fluid and filters should be changed at least twice as often as the owners manual recommends. Owners who follow the recommended schedule end up with a failed transmission. I know, because I was one of those owners.
I suggest you get a factory rebuilt transmission, and not a used transmission because most CVTs have suffered from inadequate maintenance. If properly maintained, a CVT is as good as any. Sadly, few have gotten the maintenance they should have.
And.................be careful to not "see the forest for the trees". Don't be so focused on the transmission that you miss a related malfunction.
My story: my van rebuilt transmission acted up immediately after installation. Seemed to be slipping. After a week of mis-diagnosis, the problem turned out to be a $39 faulty throttle position sensor (TPS) that caused broken transmission-like symptoms.
My story: my van rebuilt transmission acted up immediately after installation. Seemed to be slipping. After a week of mis-diagnosis, the problem turned out to be a $39 faulty throttle position sensor (TPS) that caused broken transmission-like symptoms.
@Treegrower has a point. My Patriot had a stuttering problem that turned out to be inconsistent tire sizes. I thought the inconsistency wouldn't matter since I had FWD, but the sensors fed bogus information to my ECM. When I got the tires replaced the problem went away.
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