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  #13  
Old 10-01-2015, 10:26 AM
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Quote:
Originally Posted by rszwestko View Post

I am curious, what exactly is different inside between the two transmissions?
This is all I have ever heard of the diffs:

From allpar.com

"...The transmission is a ZF design; when made by Chrysler, it has changes to match Chrysler equipment factory equipment and methods. The unit is also used by Porsche, BMW, and other high-end car makers. It is designated 8HP45 or 8HP90 when made by ZF; the Chrysler version of 8HP45 is called 845RE.

The 845RE name shows 8 speeds, “45 x 10” Nm of capacity, rear wheel drive intent, and fully electronic controls. It can be, and will be, used with 4x4 and AWD setups.

Differences between the 8HP45 and 845RE include, according to oh2o, the clutches (845RE has extra friction plates) and, for some vehicles, a higher capacity oil pan. Many internal parts do not interchange...."

In all cases, the automaker applies their platform/application specific programming. The Chrysler modified 845RE has more "volume" of discussion than the untouched 8HP70 so its logical to assume that Chrysler's mods made it more challenging to satisfy some (minority?) customers via programming. To their credit they have apparently addressed most of the concerns over time. The 8HP70 is not immune to complaints but not nearly the same volume. I am an aggressive driver so some of the "firmness" in shifting is actually welcomed by me.

I say if you are looking for reasons to go V8 or Diesel then use this as one of them but don't use "problems" with the V6 trans as a reason to avoid a JGC.

Get one!

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  #14  
Old 10-01-2015, 11:04 AM
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Re: Considering '14-'15 JCG Overland/Summit - Reliability?

I have the 8HP70 in my x5 and it's perfect. Seems like the transmissions are the same it's the software that's more of a culprit for the V6 problems.


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  #15  
Old 10-01-2015, 11:11 AM
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Re: Considering '14-'15 JCG Overland/Summit - Reliability?

55k miles on a 2014 Overland Hemi and never once had an issue with the vehicle. And I'm picky lol now I have a 2015 with the Pentastar V6 and have had a few small issues with the transmission.
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  #16  
Old 10-01-2015, 11:16 AM
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Re: Considering '14-'15 JCG Overland/Summit - Reliability?

Quote:
Originally Posted by rszwestko View Post
I am curious, what exactly is different inside between the two transmissions?
They are designed to handle different power/torque as matched to the engine they will be working with. The V6 version is "lighter duty" in that respect, while the heavier unit is matched well with the Hemi and EcoDiesel engine output.
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  #17  
Old 10-01-2015, 03:44 PM
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Re: Considering '14-'15 JCG Overland/Summit - Reliability?

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Originally Posted by Thx1158 View Post
I hate the nav and the radio (no hard drive) but love it over all.
Wow, that's the first time I think I have ever heard someone say that. I think the 8.4 uconnect system is easily one of the best on the market. Incredibly user friendly and just works very well.
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  #18  
Old 10-01-2015, 04:28 PM
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Re: Considering '14-'15 JCG Overland/Summit - Reliability?

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Originally Posted by GJBenn85 View Post
My Infiniti dealer experience isn't anything great. Their sales department absolutely sucks, but they ARE good at fixing problems and providing loaners. Though, they were just acquired by another company and the new service adviser is rude and abrasive.

I drove a Lexus GX again today and ruled it out. Amazing how much nicer the JGC is in comparison. Will probably go drive a Jeep again this weekend.

I did notice it seems to be the V6 models that experience more engine and transmission problems. Is it a different transmission in the V6 or is it simply a matter of number of V6s on the road vs. V8s?

As far as a Jeep dealer, I have no idea what any of the FCA dealers are like in my area but there are 3 within a 40 minute drive and to my knowledge they do not share ownership. Hearing of owners' Jeeps sitting in the shop for 1-3 weeks fixing a problem is disconcerting, but again, forums make everything seem exponentially worse than reality.
The Hemi and Diesel have a different transmission than the V6.
Hemi/Diesel is the same as used by several big European sedans built by ZF, the other is a licensed model built by FCA. I've driven the V6 as a loaner, and personally I don't see anything wrong with the transmission. YMMV.

I'd check around and see what rumors you can get about the service department at both the Jeep and Lexus dealer. I love my V8/GC Overland, but I also have really good relationship with the local dealer and one dealer-owner who is in the dealership a lot.

Other folks here, if I had their dealer I'd probably copy the tire commercial and ram the thing at high speed thru the showroom.
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Old 10-01-2015, 04:34 PM
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Re: Considering '14-'15 JCG Overland/Summit - Reliability?

Quote:
Originally Posted by JTS97Z28 View Post
Wow, that's the first time I think I have ever heard someone say that. I think the 8.4 uconnect system is easily one of the best on the market. Incredibly user friendly and just works very well.

I would have to agree. And any review you can find on any Chrysler product usually agrees with us. It's a great system.
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  #20  
Old 10-01-2015, 04:38 PM
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Re: Considering '14-'15 JCG Overland/Summit - Reliability?

Much of this is preference, but I think they have a bit more to do with uconnect. I don't like the nav at all. I've also read of other folks having grumbles about the unit as I researched choices before I ordered my 16 JK.
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  #21  
Old 10-01-2015, 04:43 PM
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Considering '14-'15 JCG Overland/Summit - Reliability?

^^Yeah I've read of some issues too. I've never had any of those issue though and I've had 2 GCs with it and I have a few friends that have been trouble free as well. And it's FAR superior to that pos system it replaced.
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  #22  
Old 10-01-2015, 04:51 PM
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Re: Considering '14-'15 JCG Overland/Summit - Reliability?

My 2014 Summit 4X4 diesel was a POS. Chrysler had to but it back. That took almost 7 months. Lots of run around and broken promises. I now have a 2015 Summit non 4X4 hemi. No big issues so far but several rattles. Scared to take it in because that is where all my problems started with the 2014. This will be my last Chrysler product. I have owned 7 Chrysler products so far and 2 have had to be turned in to them as lemons/buy backs. I am done.
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Old 10-01-2015, 05:38 PM
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Re: Considering '14-'15 JCG Overland/Summit - Reliability?

^Damn. I wouldn't blame you
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  #24  
Old 10-01-2015, 06:18 PM
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Re: Considering '14-'15 JCG Overland/Summit - Reliability?

I'm not opposed to the V6 only because of more complaints with transmissions; I simply do not want a V6, and I tow a heavy boat and just like having power on tap at basically all speeds. I do not want a transmission that slams into each gear, but I want each gear change to be quick and precise. Even my $80k Infiniti has some harshness with some downshifts. Can't say I had any objections to the transmission during my test drive, including with the electronic shifter (I don't see why so many people complain about it--I thought it was pretty straightforward).

Rattles--I've become quite the expert at fixing them unless they're buried deep inside the dash. Have literally torn apart doors, headliners, consoles, etc., to fix at a much higher success rate than dealers. These rattles were on Toyotas and Infinitis. As for squeaks, I do not think anything could beat the 2001 4Runner my parents owned. Good grief, sounded like someone was obnoxiously rubbing styrofoam together!

With more research, I'm slowly becoming more comfortable with the idea of a Grand Cherokee, especially since I never keep cars long anyway. I already ruled out the Lexus--the ride is choppy and there is no way I would be satisified with the engine in daily driving, let alone towing my boat.



Quote:
Originally Posted by function12 View Post
My 2014 Summit 4X4 diesel was a POS. Chrysler had to but it back. That took almost 7 months. Lots of run around and broken promises. I now have a 2015 Summit non 4X4 hemi. No big issues so far but several rattles. Scared to take it in because that is where all my problems started with the 2014. This will be my last Chrysler product. I have owned 7 Chrysler products so far and 2 have had to be turned in to them as lemons/buy backs. I am done.
What Chrysler products have you had besides the two JGCs? I've always considered Chrysler at the bottom of the bucket, but like other "American" brands they have really improved, particularly in the past 5 years. Certainly understandable your position though, I swore off Toyota after one new vehicle that I ended up selling because I had a sh***y dealer that could not resolve problems I had and gave me attitude with every problem I brought to the table.
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