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#21 ·
Gramps said:
The FD I doesn't have Off-Road mode, only a lock for the 4x4 coupler. Why do you feel the need to lock in the 4x4 mode in dry weather? I have lots of snow and ice during the winter and mine is engaged most of the time and not engaged when the conditions are rather nice. It really depends on the driving conditions. Are yours similar tio mine?

I've also heard that in the UK the lock is always on with no adverse effects.
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I guess I'm OLD school 4wheel drive
Gramps, do you know if the Patriot would actually experence Axle/Transmission Windup/Bind as I discribed above. Still trying to figure out this "electronic 4wheel drive"
 
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#22 ·
IMO, there's absolutely no point to pulling the 4X4 lock on the road. Without it on, the Pat is going to put power to the back wheels when you need it, and it won't when you don't need it.

why would anyone want to reduce thier fuel economy by locking it on the road? It's not going to help you stop if you hit ice. If you loose front wheel traction, it'll put power to the rear wheels.
 
#23 · (Edited)
CJs07RIOT said:
I guess I'm OLD school 4wheel drive
Gramps, do you know if the Patriot would actually experence Axle/Transmission Windup/Bind as I discribed above. Still trying to figure out this "electronic 4wheel drive"
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I'm still taking it all in too. I'm trying to see what I posted back on post # 11 tells us anything about that. With it being an On Demand AWD I don't believe that it gets the windup/bind that other systems do. Those conditions are usually associated with the gear drive type 4WD systems and not AWD. The brake system has a lot to do with it too by slowing down the faster wheel as needed. I'll look for more info.

polished_heckler said:
IMO, there's absolutely no point to pulling the 4X4 lock on the road. Without it on, the Pat is going to put power to the back wheels when you need it, and it won't when you don't need it.

why would anyone want to reduce thier fuel economy by locking it on the road? It's not going to help you stop if you hit ice. If you loose front wheel traction, it'll put power to the rear wheels.
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I use mine because I am constantly stopping, turning off and getting behind slow drivers where the low speed traction on ice and snow is beneficial when starting out again. I rarely get up to 50 mph during my winter drives and when I do it's turned off. It's a lot more stop, start, slow down and turn than it is maintaining a constant speed. Constantly pulling the lever for on/off isn't really necessary, we're not talking about huge amount of gas consumed or extreme wear and tear on the tires or drivetrain. ESP is also a big factor and the 4wheel lock is icing on the cake at low speeds.
 
#24 ·
CJs07RIOT said:
I guess I'm OLD school 4wheel drive
Gramps, do you know if the Patriot would actually experence Axle/Transmission Windup/Bind as I discribed above. Still trying to figure out this "electronic 4wheel drive"
Click to expand...
The Jeep MK’s use a clutch pack coupling which functions like 2wd when the clutch pack not engaged, and like an On Demand 4wd system when the clutch is engaged by the computer or locked by manual control. Some other vehicles in this category have varying degrees of control in the torque distribution between front and rear via allowing some of the clutches in a clutch pack to engage and slip varying amounts.

AWD can be used on dry pavement because it employs the use of a center differential, which allows each tire to receive different amounts of power. This eliminates driveline binding, wheel hop and other driveline issues associated with the use of 4WD on dry pavement.
 
#25 ·
Gramps said:
The Jeep MK’s use a clutch pack coupling which functions like 2wd when the clutch pack not engaged, and like an On Demand 4wd system when the clutch is engaged by the computer or locked by manual control. Some other vehicles in this category have varying degrees of control in the torque distribution between front and rear via allowing some of the clutches in a clutch pack to engage and slip varying amounts.

AWD can be used on dry pavement because it employs the use of a center differential, which allows each tire to receive different amounts of power. This eliminates driveline binding, wheel hop and other driveline issues associated with the use of 4WD on dry pavement.
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Thanks, I was thinking that it had to use a center differential, but wasn't sure
 
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#26 · (Edited)
I am from Barcelona and i not speak english very good. I speak Spanish. Sorry.
Tengo un Patriot con el sistema de traccion FDI y tengo una duda, sabeis si se le puede acoplar o instalar el FDII en un vehiculo europeo. Aqui en Espa?a solo se comercializa el motor 2.0 Diesel CRD. Gracias.
________
Ship Sale
 
#27 ·
RATILLA said:
I am from Barcelona and i not speak english very good. I speak Spanish. Sorry.
Tengo un Patriot con el sistema de traccion FDI y tengo una duda, sabeis si se le puede acoplar o instalar el FDII en un vehiculo europeo. Aqui en España solo se comercializa el motor 2.0 Diesel CRD. Gracias.
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as of right now, no. but who knows that the future holds.
 
#28 ·
The Patriot's AWD system is an intelligent/predictive/intuitive on-demand AWD system.

Very few manufacturers (ie. Subaru, Audi, Mitsubishi) make AWD systems that operate, under normal driving conditions, in a full-time front-rear torque split. I believe that the Patriot's AWD system, functionally at least, is lumped in with that of the CRV, the latest generation Rav4, Escape, Rogue, etc.

I hazard to say that the term "4x4 Lock" is a huge misnomer. My interpretation of the "lock" is that it is more of a "bias".

Also, there was a previous comment about different tire diameters. I re-iterate the importance of tire rotation. If one tire is significantly smaller than the others it will spin faster and the AWD system may interpret that as a slip and engage the torque transfer system, full-time. This also means that, generally, you cannot replace just one or two tires. It is usually all four wheels at the same time.
 
#30 ·
Well here's my 2 cent explanation. The 4x4 patriots are all fwd. In the event that the computer senses wheel slippage it will automaticly send power to the non slipping wheels. The 4wd lock mode is only for offroading, deep snow, mud , sand and so on. For most winter driving 4wd lock mode is not needed and driving around with it always on when its not needed is not a good thing. So I would only use the 4wd lock mode for snow deeper than say 4 to 6 inches or driving on the beach or driving offroad say to your favorite hunting spot. My guess is for those with the FDII system it works the same as the FDI system exept that the FDII system has a lower gear range for offroading and some additional things. Hope this helps.
 
#31 · (Edited)
Ok I listened to the video and the guy says how it works by automatically transfering power, but he says, best of all there is no driver input thanks to the cvt transmission.....so my question is what about the manual, does the system still transfer power to whatever wheels need it? or is it just fwd, then if u need 4x4 you have to lock it? I just found it kind of weird that he says thanks to the cvt transmission and just wanted to know if it still works with the manual transmission.
 
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