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  #97  
Old 08-28-2015, 10:33 AM
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Re: Ripp Supercharging my 2014 3.6 Grand Cherokee

Pretty sure your power train warranty would be voided. You would rely on RIPP's warranty to cover those components. I know for sure that a modification like this and any "unlocking" of the PCM will void the power train portion of the warranty on my GM vehicles.

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  #98  
Old 08-28-2015, 06:49 PM
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Re: Ripp Supercharging my 2014 3.6 Grand Cherokee

Quote:
Originally Posted by 68camaro View Post
Two questions;

1. Living in south, does heat and humidity impact RIPP supercharger performance
2. Does installing this void Mopar warranty, I have MaxCare lifetime warranty and would hate to see it voided?
High heat will always impact performance, I doubt you'd notice much though. I would also kiss your lifetime warranty goodby. Honestly you should not expect any power train warranty after installing this kit, everything else should remain though.
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  #99  
Old 08-28-2015, 07:25 PM
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Re: Ripp Supercharging my 2014 3.6 Grand Cherokee

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Originally Posted by JoeD View Post
I would also kiss your lifetime warranty goodby. Honestly you should not expect any power train warranty after installing this kit, everything else should remain though.
That was what I was afraid of, heard this from installer also. Unfortunate but I'll need to pass, I paid $2,200ish for Lifetime and don't want to lose it as I keep vehicles for very long time, we still have 2004 JGC.
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  #100  
Old 08-30-2015, 10:10 AM
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Re: Ripp Supercharging my 2014 3.6 Grand Cherokee

Hey guys, this is all very cool. In the back of my mind while reading all of this is, how much HP and Torque is the 8 speed transmission good for? I'm guessing the SRT's don't use it for a reason. Anyone know what the safe limits are for the stock 8 speed trannies?
Thanks!
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  #101  
Old 08-30-2015, 10:40 AM
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Re: Ripp Supercharging my 2014 3.6 Grand Cherokee

Are you saying the SRT doesn't use the 8 speed auto?
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  #102  
Old 08-30-2015, 10:52 AM
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Re: Ripp Supercharging my 2014 3.6 Grand Cherokee

Not 100% sure about the 6.4, but I thought they still used the 5 speed.

Ahh, I just checked jeep.com and 8 speed is standard on the SRT. BUT.... Is that a beefed up tranny or not?

Actually, there "seems" to be a difference. For the SRT the transmission is an 8HP70. Anything under SRT (except diesel) does not list the 8HP70. HP is for High performance obviously.
The diesel actually uses the 8HP70 also. The 3.6 or 5.7 Hemi does not.

Sorry for the confusion.

Simplified:

3.0 diesel - with 240 horsepower and 420 lb-ft of torque. Calls for 8HP70 tranny.

3.6 - delivers 290 horsepower and 260 lb-ft of torque. Calls for standard 8 speed.

5.7 - It delivers 360 horsepower and 390 lb-ft of torque. Calls for torqueflight 8 speed tranny.

6.4 SRT - delivers 475 horsepower, 470 lb-ft of torque. Calls for 8HP70 tranny.

http://www.jeep.com/hostc/bmo/CUJ201...do#/powertrain

http://www.jeep.com/hostc/bmo/CUJ201...do#/powertrain

Now unless they are not consistent on the jeep.com website and just lazily not entering the correct transmission descriptors and all of these transmissions are in fact identical...... then to my original question.

Possible that because both the diesel and the 6.4 Hemi push over 400lb ft. of torque, that the 8HP70 is utilized.
I'm sure somebody with more knowledge than myself are abundant around here. Enlighten me please.
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  #103  
Old 08-30-2015, 11:03 AM
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Re: Ripp Supercharging my 2014 3.6 Grand Cherokee

My Hemi has the 8HP70 built in Germany by ZF. Pretty sure that's the same as the SRT, however, the SRT has extensively revised programming (launch control, etc.) for its high performance applications.
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  #104  
Old 08-30-2015, 11:20 AM
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Re: Ripp Supercharging my 2014 3.6 Grand Cherokee

Quote:
Originally Posted by 2014RedHemiGC View Post
My Hemi has the 8HP70 built in Germany by ZF. Pretty sure that's the same as the SRT, however, the SRT has extensively revised programming (launch control, etc.) for its high performance applications.
How do you know it's the 8HP70? On the sticker as an option or standard equipment? I am not doubting you have one by any means. Just want to know how people can check to see what they have. I am currently looking for my original window sticker to check. Thanks.

Also, are all 8 speed transmissions for the JGC 8HP70s?

I think this is an important question, seeing as how the RIPP supercharger is essentially putting more than twice the original HP of a 3.6 through the powertrain. I know I'd want to have the same tranny as the SRT does.
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  #105  
Old 08-30-2015, 11:40 AM
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Re: Ripp Supercharging my 2014 3.6 Grand Cherokee

Yes, it's on the window sticker and the build sheet. Also, the transmission has a sticker on it that says Made in Germany.
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  #106  
Old 08-30-2015, 11:48 AM
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Re: Ripp Supercharging my 2014 3.6 Grand Cherokee

Nice. Thanks! Still looking for mine. Any towing package come with or ordered for yours?
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  #107  
Old 08-30-2015, 12:07 PM
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Quote:
Originally Posted by Keysplayr View Post

How do you know it's the 8HP70? On the sticker as an option or standard equipment? I am not doubting you have one by any means. Just want to know how people can check to see what they have. I am currently looking for my original window sticker to check. Thanks.

Also, are all 8 speed transmissions for the JGC 8HP70s?

I think this is an important question, seeing as how the RIPP supercharger is essentially putting more than twice the original HP of a 3.6 through the powertrain. I know I'd want to have the same tranny as the SRT does.
The 2014-2015 6.4, 5.7 and diesel all use the 8HP70 which are made by ZF. Earlier 2014s were made in germany by zf later 2014s and beyond are made by zf in south carolina. Still zf made just not in germany any more. The v6 gets an 845RE which is made by chysler under license from zf its made in Indiana. Chysler modified and mucked with the 845RE and probably why its been the problem plagued one with the shifting issues. The 8HP70 will handle up to 700 nm and the 845RE will handle up to 450 nm.
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  #108  
Old 08-30-2015, 12:18 PM
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Re: Ripp Supercharging my 2014 3.6 Grand Cherokee

Quote:
Originally Posted by silvermax04 View Post
The 2014-2015 6.4, 5.7 and diesel all use the 8HP70 which are made by ZF. Earlier 2014s were made in germany by zf later 2014s and beyond are made by zf in south carolina. Still zf made just not in germany any more. The v6 gets an 845RE which is made by chysler under license from zf its made in Indiana. Chysler modified and mucked with the 845RE and probably why its been the problem plagued one with the shifting issues. The 8HP70 will handle up to 700 nm and the 845RE will handle up to 450 nm.
Thanks! good info.

That's what I was afraid of. 450nm on the 845RE is 331lb-ft.

845RE / 8R70: ZF 8-Speed Automatic Transmission for Chrysler cars

So, the last dyno run on that supercharged 3.6 shown 394 HP at the wheels and about 350lb-ft of torque. That is over the spec for the 845RE.


I can only imagine that the next modification to that particular jeep would be the exhaust system which will up the HP and torque even more. I don't mean to cause alarms, but I do also like to be informed about limitations.

Side note: I can confirm the crappy shifting my 2015 had before I complained to the dealer and they reprogrammed it.
I nicknamed the transmission "Bangarang" as it would constantly clank and bang trying to find the proper gear it should be in.
Since the programming though, it has been a thousand percent better. I don't even notice it shifting anymore. But i was so upset the first few months driving this thing.
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