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Freedom Drive one or two, how do i know which one i have?

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ChiefRudy

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Discussion starter · #1 · (Edited)
How do I tell if my wife's 07 compass limited has the FD1 or FD2? I have the original window sheet and it doesn't state either or on it with the exception of saying it's a 4x4. From what I've been reading The FD1 is the same as the FD2 but the FD2 has some extra features. Like the 19:1 ratio, down hill assent control and etc. Now I know her compass doesn't have the off-road package on it and FD2 looks to be included in that package.

I bet though, there are probably compasses/patriots out there with the FD2 and no off road package included. I've seen some odd-ball builds come out of jeep factories. When my wife was looking for a compass we found dozens of limited models with everything included except (missing one, some or all) power locks/ power mirrors/ power windows and cruise. which I thought was very odd for a limited model to not have the most basic features. Even my fathers 05 liberty limited is the same as my sport model except for his limited paint job and rims.
but any ways...

So can someone share some first hand insight on the Freedom drive systems for me? I'm not new to jeeps but I am new to AWD systems.

Thanks!
 
#2 · (Edited)
You have FDI. FDII only comes as the off road package, and if you had FDII, the sticker would say it. Otherwise, all 4x4's are FDI.

On top of this, FDII off road package wasn't available on the Compass until 2011, when they redesigned the front
 
Discussion starter · #3 · (Edited)
mrJeepr44 said:
You have FDI. FDII only comes as the off road package, and if you had FDII, the sticker would say it. Otherwise, all 4x4's are FDI.

On top of this, FDII off road package wasn't available on the Compass until 2011, when they redesigned the front
Click to expand...

Thanks for the info. I wasn't aware FD2 wasn't available for compass until 2011. That makes since to me too b/c I was reading some sites that said the Compass wasn't a true jeep b/c it couldn't be trail rated. Then I was even more confused at those comments b/c when I was looking through the build page on jeep.com an off-road package available making it trail rated. but now it all makes sense.


So here's my next questions. Now that I know I have the FD1.

When the 4x4 lock is activated is that just the same a 4HI with engine torque being divided 50/50 between front and rear axles?

Also, I know the FD1 4x4 lock has a speed limit. 35 MPH I think. So does that mean the vehicle shouldn't be driven that fast when 4x4 lock is active or does it mean the 4x4 lock will be turn off at that speed automatically and go back to being an AWD.
If it's the case being turned off automatically at 35 MPH, will the 4x4 lock turn back on automatically when speed goes below the 35 or does the compass throw the switch off when the speed limit is hit and requires the driver to put it back on?
 
#4 · (Edited)
I've never actually seen Jeep come out and say 4x4 unlocks above 35... But I have read ESP will turn back on above that speed if it is off. It might disengage above 35, but I've never been able to notice that... Accelerating almost full throttle to 60 mph uphill on an on ramp in a driving rainstorm with 4x4 locked it never slipped for me, and I know a 2wd would have.

The owners manual does however say you can use the 4x4 lock any time at any speed. If it can't or shouldn't then it won't, and you'll never know it because its all done electronically.

The Jeep will actually engage 4x4 as needed anyways. Under hard acceleration it engages, accelerating out of a turn it engages, and if it detects slippage it engages. 4x4 lock is only necessary when you need an absolute 50/50 split from front to rear, or occasions where you can't risk not knowing if it is in four wheel drive (like pulling a trailer up an icy boat ramp)

You can think of it as 4 wheel high since there is no low range, but your not limited in when you can or can't use it. This system shouldn't hurt anything to use on dry roads, but there is no point to doing that. Personally, I'm used to vehicles getting tire scrub and wheel hop if 4x4 is used where it can't slip, so I don't lock it unless I need it :)
 
Discussion starter · #5 · (Edited)
mrJeepr44 said:
I've never actually seen Jeep come out and say 4x4 unlocks above 35... But I have read ESP will turn back on above that speed if it is off. It might disengage above 35, but I've never been able to notice that... Accelerating almost full throttle to 60 mph uphill on an on ramp in a driving rainstorm with 4x4 locked it never slipped for me, and I know a 2wd would have.

The owners manual does however say you can use the 4x4 lock any time at any speed. If it can't or shouldn't then it won't, and you'll never know it because its all done electronically.

The Jeep will actually engage 4x4 as needed anyways. Under hard acceleration it engages, accelerating out of a turn it engages, and if it detects slippage it engages. 4x4 lock is only necessary when you need an absolute 50/50 split from front to rear, or occasions where you can't risk not knowing if it is in four wheel drive (like pulling a trailer up an icy boat ramp)

You can think of it as 4 wheel high since there is no low range, but your not limited in when you can or can't use it. This system shouldn't hurt anything to use on dry roads, but there is no point to doing that. Personally, I'm used to vehicles getting tire scrub and wheel hop if 4x4 is used where it can slip, so I don't lock it unless I need it :)
Click to expand...

Thanks for the info. I got the 35Mph number from jeep.com. Under the section where they describe all the 4x4 systems they have. But long as the 4x4 lock gives it a True 4Hi I'm happy.

Thanks for answering all my questions and I know i probably sound like a noob. I've been driving jeeps since 2006 with my Liberty so I know just about everything there is to know about a "traditional" 4x4 system but AWD systems like FD1 I'm just not familiar with. I'm happy for my wife though since its less she has to do. She had a 2002 liberty that we traded in for the compass and she wasn't sure sometimes if the road conditions required the 4hi. Now she won't have to worry about it as much and just use the 4x4 lock when it's bad enough.
 
#7 ·
Two years ago for the winter I locked it a lot for acceleration since the roads in at least one North Dakota city aren’t plowed very good. There attempt to plow leaves a lot to be desired. Last year I bought a set of snow tires and only would have locked it a couple of times due to ice from lack of plowing competence.
 
#9 ·
The normal all time 4wd mode is for all conditions but any "locked" 4wd mode should only be used offroad or when condition are so slippery it requires more traction. locked modes should not be used in regular dry condition because it can cause binding in the drive system. Locked 4hi should be treated the same as locked 4lo, not to be used all the time.
 
#10 ·
MKP12 said:
locked modes should not be used in regular dry condition because it can cause binding in the drive system.
Click to expand...
This does not apply to the Compass or Patriot, there will be no binding on dry roads.

One thing you have to keep in mind is the 4x4 lock switch is really just a request to the computer to lock the rear diff (or in the case of our vehicles, energize the rear differential electric clutch). The computer will still cycle it on or off if need be based on other sensor data. In AWD mode for example, if you accelerate hard in a straight line, it will engage the rear clutch and power the rear differential. It does this to enhance straight line acceleration and helps negate torque steer from the front.

As for the difference between FDII and FDI, it's only a difference in ring and pinion ratios. There are three different ring and pinion gear ratios for the Patriot. 5-speed Manual, FDI CVT and FDII CVT have 4.12:1, 6:12.1 and 8.12:1 and with all three in 1st gear they have the following crawl ratios: 15:1, 14:1 and 19:1. The 5-speed manual has a slightly higher crawl ratio in 1st gear then the FDI because it's 1st gear is lower then the CVT's 1st. Other then the ring and pinions, the two CVT's are identical.

The PTU (Power Take-off Unit) that is bolted to the passenger side output of the transmission get's it's rotational power directly from the ring and pinion carrier and always sends it to the rear differential via the driveshaft. The computer will then cycle the ECC (electronically controlled clutch) on the rear diff to power the rear wheels. So even when the 4x4 Patriot is driving around in 2wd mode (only powering the front wheels), the PTU is spinning the driveshaft and sending the power to the rear diff clutch.
 
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