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Old 08-02-2013, 03:02 PM
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Service Bulletin 21-006-13 '09-'12 WK/'09-'10 XK 5.7L FLASH: Transmission

Service Bulletin NUMBER: 21-006-13
GROUP: Transmission and Transfer Case
DATE: July 25, 2013
SUBJECT:
Flash: Transmission Performance Enhancements
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software.
MODELS:
2009 - 2012 (WK) Grand Cherokee
2009 - 2010 (WH) Grand Cherokee (International)
2009 - 2010 (XK) Commander
2009 - 2010 (XH) Commander (International)
NOTE: This bulletin applies to vehicles equipped with a 5.7L engine (sales code EZH).
SYMPTOM/CONDITION:
A small number of customers may experience any of the following:
Erratic or inconsistent initial 2-3 upshift(3-4 upshift on 2012 MY vehicles)
Sluggish performance during low speed/rolling stop maneuvers(2012 MY vehicles only)
Transmission Enhancements are also included with this software release. These changes include the following:
Enhanced torque converter lock-up schedule to reduce transmission operating temperatures(2009 MY vehicles only)
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Old 08-02-2013, 03:04 PM
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Re: Service Bulletin 21-006-13 '09-'12 WK/'09-'10 XK 5.7L FLASH: Transmission

This happened yesterday:

Ok, I just got the update done. My local dealer is AWESOME. In and out in 20 minutes.

I brought the TSB in and like the last time I had updates I asked them to perform the TSB and got no pushback.

Here is the work order text:

AUTO TRANSMISSION - AS PER TSB ATTACHED TO REPAIR ORDER SOFTWARE UPDATE AVAILABLE FOR VEHICLE CHECK AND PERFORM UPDATE IF APPLICABLE

Software issues/updates found for PCM and ASCM/updated as requested by the customer.

Performed software updates on the PCM and the ASCM, installed required label, reset all trouble codes associated with procedure, old PCM software #68111691ae new #68111691af, old ASCM software #56029558ae new #56029558ai


My WK2 was last updated with the most recent software builds for the entire vehicle back on May 6.

You can see that Jeep has had a couple updates to the ASCM in between May 2013 and present day (August 1) as the build jumps from ae to ai.

My work is only a couple miles from the Jeep dealer so I can't honestly report back on if the issues I had are fixed or not but I will once I get some drive time with the new software build loaded with this TSB.

FWIW my Jeep is a 2012 WK2 Summit with the HEMI.

Update:

Ok wow
Ok I am out on a drive now on roads here in SoCal I drive every day.

All I can say is run don't walk to your dealer and get this TSB done if you have a 2012 WK2 with a V8.

If you ever had power train complaints before, this update fixes them!

More details when I get back home and can post from my computer vs phone.

Was so impressed I had to pull off the side of the road to update you guys.

More feedback after I return from my cruise on PCH.

Update #2:

I had all of those problems and they were resolved by the TSB.

No shudder or fishbite (my vehicle has never exhibited that behavior)

It's like driving a different Jeep now.

The transmission is now competent and allows that wonderful Hemi "Eagle" engine to shine.

I drove 80 miles yesterday, traversing all the roads that previous to the TSB gave me fits due to the inconsistent and lazy shifting when slowing for lights or making turns.

The Jeep finally knows what gear to be in and the acceleration is just as it should be. No more feeling like I am in 5th gear when I should be in 2nd. It's almost like being in sport mode, but I am not.

Converter lockup is a lot more consistent too. The Jeep always felt great on the freeway, but on regular streets the shifting felt confused and lethargic.

No more. When I am slowing for a light that is red that suddenly turns green and I push the gas, the vehicle actually accelerates in the proper gear and doesn't sit there loafing waiting to downshift.

The upshifts are a lot more consistent and timed properly too.

Whoever wrote this firmware for the shift programming over there really deserves a raise/bonus. This is definitely the way this vehicle should have been delivered.

The TSB is a valentine from Jeep for owners of this model year. It completely resolves all the power train issues I had with the V8 and auto trans equipped in this WK2. I'm very impressed that they still support previous model years with these VERY useful software updates.

Definltely go get this update if you haven't already. You will be amazed at the drivability differences with your Grand Cherokee after it's applied.

It's definitely a different driving experience for me now. I am very pleased.

You guys have got to get your WK2's (if you have a V8 and fall under the date range!) over to a dealer to get this TSB performed. I cannot put into words how much better this rig drives now. If you are under factory warranty, the work is free...I would say it's even worth it if you are out of warranty and have to pay the labor to get it done...It's night and day!!
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Old 08-02-2013, 04:22 PM
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Re: Service Bulletin 21-006-13 '09-'12 WK/'09-'10 XK 5.7L FLASH: Transmission

http://www.wk2jeeps.com/tsb/tsb_wk2_2100613.pdf
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Old 08-02-2013, 09:18 PM
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Re: Service Bulletin 21-006-13 '09-'12 WK/'09-'10 XK 5.7L FLASH: Transmission

Thanks for the heads up!
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Old 08-03-2013, 07:03 AM
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Damn it, nothing for the 3.6L?
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Old 08-03-2013, 08:10 AM
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Quote:
Originally Posted by Sammzway View Post
Damn it, nothing for the 3.6L?
Yea there's one for 3.6 too
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Old 08-03-2013, 08:50 AM
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Re: Service Bulletin 21-006-13 '09-'12 WK/'09-'10 XK 5.7L FLASH: Transmission

Quote:
Originally Posted by mceb View Post
Yea there's one for 3.6 too
Can you please point me to that direction my good man?
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Old 08-03-2013, 01:26 PM
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Quote:
Originally Posted by Sammzway View Post

Can you please point me to that direction my good man?
It's in a couple of threads but here is link to PDF for 3.6
http://www.wk2jeeps.com/tsb/tsb_wk2_2100713.pdf
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Old 08-04-2013, 09:53 PM
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Re: Service Bulletin 21-006-13 '09-'12 WK/'09-'10 XK 5.7L FLASH: Transmission

Does anyone know if you can get these TSBs done for free if you are out of the 36k but you have the extended warranty?
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Old 08-05-2013, 06:27 AM
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Re: Service Bulletin 21-006-13 '09-'12 WK/'09-'10 XK 5.7L FLASH: Transmission

Quote:
Originally Posted by Biggie65792000 View Post
Does anyone know if you can get these TSBs done for free if you are out of the 36k but you have the extended warranty?
You have a 100k mile drivetrain warranty. The trans is part of the drivetrain. It should fall under that.
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Old 08-05-2013, 08:22 PM
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Re: Service Bulletin 21-006-13 '09-'12 WK/'09-'10 XK 5.7L FLASH: Transmission

So for the TSB's, do you just roll in and say "I would like to have this TSB done?" or what. I've got a little of the transmission "thunk" when shifting to park and I intend to take it in for that. Do I just ask them to apply any software TSB as well?
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Old 08-05-2013, 08:25 PM
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Re: Service Bulletin 21-006-13 '09-'12 WK/'09-'10 XK 5.7L FLASH: Transmission

Quote:
Originally Posted by The Evil Twin View Post
So for the TSB's, do you just roll in and say "I would like to have this TSB done?" or what. I've got a little of the transmission "thunk" when shifting to park and I intend to take it in for that. Do I just ask them to apply any software TSB as well?
I think you call and make an appointment, and reference the TSB to make sure the dealer is ready, willing and able.


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