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  #13  
Old 04-09-2011, 12:34 PM
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Quote:
Originally Posted by Lingohocken View Post
From this thread, it would seem that the shift improvement is not being incorporated into production. So, if you want it, you apparently have to ask for the TSB regardless of the date of production.

This flies in the face of the December date indicated on the TSB. However, it might make sense because if they changed the shift behavior during production it would likely impact gas mileage and meeting CAFE requirements.
I read the TSB and it seems that it does not apply to WK2's built on or after March 6...

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  #14  
Old 04-09-2011, 01:51 PM
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Re: TSB 18-012-11 Rev.A 2011 builds

Sensible explanation and great news! Presumably JF Inferno's truck was manufactured just before that 3/6 cutoff date.
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Old 04-10-2011, 07:57 PM
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Re: TSB 18-012-11 Rev.A 2011 builds

So I had a chance to test out the TSB 18-012-11a update as my wife and took a ride to the mall today with our two month old. Now that I had a chance to really test it out around corners, accelerating from a stop, driving up hills and in stop and go traffic, I can tell you that it drives much better than before. 1st and 2nd gears hold longer which makes the pick up so much better going into 3rd gear. No more short 2nd gear which was allowing it to shift into 3rd way too soon at low rpm which made it feel like you needed more pedal effort to pick up speed. Because of the improved performance, the Jeep feels lighter and much niftier....doesn't feel like a heavy vehicle. Before the TSB, the Jeep felt big and heavy due to the dead spot in torque....that's mostly gone. Much better driving experience. Driving in stop and go traffic has much improved as I mentioned that it doesn't shift into 3rd gear as much and as soon. Highly recommend the update if you haven't already.
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  #16  
Old 04-14-2011, 09:44 PM
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Re: TSB 18-012-11 Rev.A 2011 builds

Just had mine done on monday(4/11) this week.
The TSB 18-012-11a & 18-001-11, it drives 100% better
Its like they gave me 30 more hp. Much much better when
towing also.
Now I want to compare gas milage before and after the
TSB's were done.
before TSB's
Mpg around town avg=18
MPG highway trips avg=21
Trailering to the pits and back about 30 mi
Mpg =19
This is all off the EVIC
current milage 6682
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  #17  
Old 04-16-2011, 10:57 PM
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Re: TSB 18-012-11 Rev.A 2011 builds

I had the update applied today. I have to say that I noticed a huge difference in the driving experience. As stated above 1st and 2nd gear hold longer and it no longer upshifts to 3rd gear when taking corners eliminating the "dead zone" I experienced before. Overall the vehicle feels lighter and it seems to require less pedal input during acceleration. The update is definitely worth doing!
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Old 04-21-2011, 07:55 AM
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Re: TSB 18-012-11 Rev.A 2011 builds

I just had this done on my Laredo X 4x4 QT I, built in Oct 2010, no updates applied before. (Please note that service writer may not know that this applies to your car. I was told that the only thing that shows up in her computer for my VIN was ESC update. However, I also knew about 18-013-11 Rev A, HVAC and Sloshing fuel tank TSB that I thought applied to my car. I printed them all out and highlighted symptoms that I experienced. She took all printouts to mechanic and after service was done I was told that all electronic TSB-s were performed.)

I mostly agree with all positive comments above. Difference is noticeable.

1) Holds 1st and 2nd gear longer which provides better acceleration from the stop and other situations

2) Much less situations when transmission "doesn't know what gear it wants to be in" - this happened especially often on the inclines

3) Dead zone in accelerator is decreased, "drive-by-wire" feeling is less.

4) "Engine braking" seems to be significantly decreased or gone completely. This requires a bit of readjustment in my driving habits because car now "coasts" much more when you decrease pressure on accelerator and doesn't downshift as much.

5) Accelerator needs less driver input which makes drive easier.

6) I think sound of engine when parked has changed. It seems a bit louder, possibly because it now idles at higher RPM?
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Old 04-22-2011, 10:47 PM
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Re: TSB 18-012-11 Rev.A 2011 builds

If you have a march build it should already have the updates. The dealer can plug it into the computer and check for sure. I have noticed several people ask about the updates and say they think their new build has the same issues. I don't think they know how bad these were before this tsb. I had this tsb done right before I got rid of mine for the Hemi. The tsb did make a big improvement, but there is only so much that can be done I guess. This engine trans combo just doesn't seem to be a good fit. Once up to speed it seems fine, but at low speed it's quite sluggish. Maybe once they get the 8 speed out this engine will perform better in this vehicle.
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  #20  
Old 04-28-2011, 11:25 AM
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Re: TSB 18-012-11 Rev.A 2011 builds

Quote:
Originally Posted by vnbWK2 View Post
Well, I drove the Jeep home and noticed a slight improvement, or was that just my mind thinking it's better. From the paper work they handed me as I left the dealership, the line item indicates 18-012-11...without the 'a'. Does that mean they did not apply the updated version or that's just how they indicate it on the line item? Is there another way for sure, besides asking the dealer, to ensure that it's 18-012-11a they applied? Are there other numbers on the paper work or sticker that would indicate the REV A version? REALM, what does your paper work say?
I just had mine done this morning with the same results. When I took it in he only wrote down the original TSB # and I specified to do revision "A". I didn't notice the "a" was missing on the paper work until I got home so I called and they said they would do it again. I must say that I noticed a difference but if I'm going to the trouble of having it done I want the most current one. I'll be back first thing Saturday morning. Luckily it only takes about 20 minutes total.
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