So this is where the transfer case bolts up to the transaxle. This is the spline that drives to the rear drive shaft. And then you've got your output to the right axle shaft, and then the left axle shaft. The driver's side would normally go right straight through the transmission and right into the transfer case. Show So that's kind of a view of the two units. I'll just show the other view again, just to get a kind of an idea of it. Again, the rear drive and there it is. So, as I said, it's supposedly a remanufactured unit. And by looking at these markings, it looks to me like these are sort of remanufacturing marks, but it sure looks brand new. However, they clean it up they sure make it look pretty decent. So that's our short picture show for the day. Mark: So did you have anything to do with electronics after you replaced the unit? Bernie: No, it actually was a nice plug and play operation. We expected we'd probably have to reprogram it
afterwards, but it didn't require it. So once we put it in you know, fired everything up road tested it, cleared the codes, drove it, everything, no warning lights were on, everything operated perfectly. So no issues whatsoever, which is kinda nice because there's so many vehicles where anything electronic has to be reprogrammed for the vehicle. I don't know why the computers just don't talk to each other, but for some reason, a lot of manufacturers just make it too
complicated for some reason, but this was straightforward. Surprising. Mark: How labor-intensive was this replacement? Bernie: Yeah, it was a fair bit of work. So I mean, they really wedged this thing in there. When we first looked underneath it, it looked like you'd have to drop the subframe, which looked like an awful lot of work just to get the transfer case out. But of course, you know, we do look at the instructions in the repair manuals. They said not to
do it, we didn't have to do it. It actually does come out, but there's an awful lot of work required to get it out. The exhaust system has to be removed and exhaust manifolds and certain things just to access it. But once, once everything's accessed property, then it comes out. But it is a lot of work, fairly labor intensive, for sure. Mark: So again, why would you not just rebuild it yourselves? Bernie: You know, with a transfer case like this, like
I was talking about the olden style of transfer cases where they basically, there was a mechanical linkage to it. Those are really pretty straightforward to rebuild it, just gears, chains, a few other items inside. And even if it has a module on it, even sometimes that isn't make it too complicated. With these type of all wheel drive systems, there's a lot of complexity. A lot of things that are monitored and like slipped clutches and things like that to provide a nice all wheel
drive feeling to the vehicle. It gets really complicated to rebuild them. And if we'd found something, there could be something wrong with the module on top of that. So it came as a nice unit from the dealer, nice package. It just made more economic sense. And the final bill was not really anything more than it would have been if we have to do a full job. So in the end, it just made more sense to replace the unit. Mark: How many kilometres run this Jeep
Cherokee? Bernie: Only 69,000. So not really a lot. I would expect the transfer case to have lasted a whole lot longer, but again, even on Grand Cherokees, we've run into a lot of problems with transfer case modules and things that tend to go faulty. So I think it's a bit of a I mean, this is a different design than a Grand Cherokee, but I think there's a bit of an issue going on with the electronics and some of these Jeep four wheel drive systems that it's a bit
problematic. Mark: If you're having trouble with your Jeep in Vancouver, the guys to call are Pawlik Automotive. You can book online on their website pawlikautomotive.com. Or give them a call 604-327-7112 to discuss your repair. They'll check it out exactly what's going on. They'll get ready for you. Book your appointment, you have to call or book online to get in. They're busy always. Or you can check out the YouTube channel. Pawlik Auto Repair, close to a thousand videos there of all makes and models of any types of repairs. Over 10 years of doing this. And of course, we really appreciate you listening and watching. Thanks Bernie. Bernie: Thank you, Mark. Thanks for watching. Some people said they replaced just the Control unit, some just the motor, some both, some the entire transfer case. Seems you have to have a special scanner to see any codes for the 4wd system, but since I don't have any lights, I assume I don't have any codes possible. My scanner doesn't show any issues. Because
there are several components working together, in a chain, to apply or reduce pressure on the clutch pack inside the Transfer Case, if any of them fail in the chain, just like a link in a chain fails, the end of the chain doesn't work. Many components inside the Transfer Case, if they fail, its cheaper just to replace the whole unit with a rebuild than break it down and repair the internal components yourself. I actually thought you were jumping the gun deciding it was the electronic
module, and thought you would be sorry when you replaced only to find out the real cause was another one of the other components in the chain that failed. OBDII is a government mandated protocol for emissions, so the gov mandate makes it standard and thus easy for a third party to produce a scanning tool with the gov published protocol. Just about everything with the engine and a few things with the transmission will affect emissions. So the one good thing, a cheap OBDII scanner can give
you all the codes for the engine and a few for the transmission. The problem is, the manufacturers built on that technology for their other systems, but aren't required by a gov mandate to stick to a standard protocol. And all the manufacturers take advantage of consumer ignorance to make their software protocols proprietary and keep them from owner's and independent shops in an attempt to force their owners into their Dealerships. FCADiag and AlphaOBD are a cheap solution, there
are others that are more expensive and they all do different levels of diagnostic and service, usually short of the Dealer tool, but enough for what a consumer needs. ...Through research a lot of people have had the FDCM (final drive control module or Transfer Case Control Module) replaced at the dealer for this. I have yet to see a post pointing to this issue in a 2014 or newer WK2, mostly 2012 and older. Also mentioned in a couple of post is the dealer has to program
the control unit. Not sure what they are programming it for though and only saw that a couple of times for older jeeps.
Again, consumer ignorance, Modules can need.....
I'm sure there are more that I forgot..... But for those that don't know better, they just describe it as "Programing the Module"..... You didn't say what Transfer Case you have, it's a good assumption you have the MP3023. I thought I read somewhere the clutch pack requires a calibration of its initial point to apply pressure. Not sure if it performs that calibration itself during normal operation, of it it's done as a service procedure. If it requires a calibration procedure to be activated, that might be the "Programming" you hear discussed. And the system might work ok without the calibration, there is probably some default set that works close to normal, but you're not getting the right torque biases out of the system until its calibrated. I don't know that for a fact, just a guess based off what I little I know.
The Jeep implementation of the MP3023 can be put into neutral for flat towing, that is only an option to disconnect the drivetrain from both front and rear axles, not just one. From what I read, the MP3023 has the ability to completely disengage the clutch pack to go into RWD mode, Jeep just choose not to use that mode. Going into "Sport" mode will reduce the torque bias to a minimum, 10% Front / 90% Rear for earlier WK2's, not sure on the later. And that is a torque bias, not a torque split, driving down the road steady state you'll have an even amount of torque applied to all wheels. If you turn, wheels slip, jam the accelerator down, you get a split of 10/90 while in that transitory state, but then back to an even split again. The way the MP3023 switches mode is a single discrete signal of different voltage levels. So I guess if you disconnected the control module and apply the right voltage to the right pin, you'd get it to shift into the RWD mode that other manufacturers use. Or you could rewrite the software of the control module. But neither sound very practical, and it does sound like a good way to destroy your expensive transfer case, cause you're likely to get something wrong or fail to anticipate something that will go wrong, and cause damage. So the practical answer is, there is no way to completely disengage the front drivetrain for you WK2. And I could be wrong, it's possible the MP3023 delivered to Jeep are built different than others and have no ability to shift into RWD only mode, as in mechanically impossible, not just a mode not utilized in the control module like I suspect...... How much does it cost to replace a transfer case in a Jeep Grand Cherokee?The average cost for a Jeep Grand Cherokee transfer case shift motor replacement is between $811 and $1,004. Labor costs are estimated between $70 and $89 while parts are priced between $741 and $915. This range does not include taxes and fees, and does not factor in your specific model year or unique location.
How much does it cost to fix a Jeep transfer case?The average cost for a Jeep Cherokee transfer case shift motor replacement is between $920 and $1,021. Labor costs are estimated between $386 and $487 while parts are priced at $534.
What does a transfer case do on a Jeep Grand Cherokee?The transfer case in a Jeep Grand Cherokee is responsible for distributing the engine's power to all four wheels using the front and rear axles. The transfer case manages the 4WD modes of the Jeep Grand Cherokee.
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2015 jeep grand cherokee transfer case problems
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