Why is my patriot reving at 3000 rpm's at cruising speed? Help me out here.
High RPM's
pump_3a
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KFC
You kill me. I always LOL at your posts.
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The CVT2L will burn approximately 10% more fuel than the CVT2 at highway speeds. It is designed for 10 mph offroad use.
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FDII high revs
So I'm curious- is there anyone from (or knows) Jeep engineering out there that might know answers to these questions- I'm sure there are lots of FDII owners that would LOVE to know:
1. Is there a reason the an FDII transmission HAS to rev high "at highway cruising speeds"? I understand the need to rev higher for off roading (which my Patriot does nicely), but shouldn't it be possible to rewrite the software to lower "highway speed" revs and help out mileage at highway cruising speeds?
2. If not, might it be a possibility to flash a FDII computer with FDI software so that it would lower the revs at highway cruising speeds?
So I'm curious- is there anyone from (or knows) Jeep engineering out there that might know answers to these questions- I'm sure there are lots of FDII owners that would LOVE to know:
1. Is there a reason the an FDII transmission HAS to rev high "at highway cruising speeds"? I understand the need to rev higher for off roading (which my Patriot does nicely), but shouldn't it be possible to rewrite the software to lower "highway speed" revs and help out mileage at highway cruising speeds?
2. If not, might it be a possibility to flash a FDII computer with FDI software so that it would lower the revs at highway cruising speeds?
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583 Posts
You can't change the gear and final drive ratios since they are mechanical pieces, and don't relate to anything within the computer. Maybe you can change the shift ratio (shift points) by flashing the chip?
The CVT only has some much range of adjustment to create drive ratios. With the Off-Road pkr your get the super high final drive differential gearing. The diff gearing is what you are noticing. The STD trans get 4.12's the basic CVT gets 6.12's and the CVT2L get a crazy tall 8.135 diff pack. The higher the ratio the higher the rpms at any given transmission ratio. The only possible fix to your problem would be to get the shorter diff gearing but you will loose torque in low range.
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214 Posts
The other day I was picking up speed on a very very short on ramp. The Jeep reved all the way with the needle buried. The engine was making a very loud rev noise too. I let off the gas quick. I can't see this being too good for the drive train. I have the CVTII.
I haven't tried this myself, but I've heard that putting the pedal halfway down and letting the CVT shift down and then putting the pedal down further works better. Also, you might have your dealer check and make sure you have the latest engine management programming.
For better or worse, I understand we have electronic throttle by wire, and shift by computer with the CVT models.
I think this is a common bug in the 2007 CVT's. Get it flashed at your dealer and you'll see an increase in the milage and better throttle response to boot.
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83 Posts
Well that seems alot better than what i get, i payed attention today and im at about 2850 for 68 mph (110 kph). I wonder why im revving so much more. Being a 5-spd it shouldn't slip or anything so having some more resistance from my roof basket and lights shouldn't matter, or am i wrong on this?
Unless your clutch is slipping under load, which we will hope is not happening, your roof basket and lights shouldn't matter.
I was talking about a 2008 US model. If you have a diesel engine or another market drivetrain, it could be different. You might consider making your general location part of your signature so that we can get an idea of any peculiarities in your area.
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1,412 Posts
My 4x4 (non Trail rated Patriot Sport ) with CVT cruises at 60 mph using 2,000 rpm. My 03 Toyota Camry four speed 4 cylinder automatic cruises at 60 mph and also runs at 2000 rpm. Since 4th in the Camry is an overdrive gear, I would have to say that I feel the CVT does have overdrive, you just don't see it listed on the shifter.
The Camry is very efficient and gets 30 mpg on the highway and about 26 around town. My Patriot gets around 22 around town and 27 on the highway, which is not bad either.
The Camry is very efficient and gets 30 mpg on the highway and about 26 around town. My Patriot gets around 22 around town and 27 on the highway, which is not bad either.
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229 Posts
I have an 07 5 spd and at about 70mph it is around 2800 RPM to 3000 RPM as well. You would think that if the RPMs were that high they would just toss in a 6spd like in the liberty or wrangler.
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