Go ahead an delete this thread.

Error came up this morning,

My apologies.

It's been 3 days now. Like I said normally within a day I can get the message, I test 4lo often. Ill keep checking, I jsut thought I would ask in case someone may have seen this also.

Thanks for the quick reply

Hello everyone,

I have been running the 7137 in my 2010 HEMI Grand Cherokee for years now, and as a WK owner plagued with Service 4WD System errors.

Now, I have all the latest updates and even a new actuator but the errors still kept coming. Anyways, when I remove the tunes from the vehicle I don ...

I just noticed a TSB http://www.wkjeeps.com/tsb/tsb_wk_1803811a.pdf

I am just wondering if the dealer installs this will it affect the tune after I reprogram the PCM ?

2010 WK 5.7L
Catch can, drop in K&N

I run the recommended 89 fuel but just wondering which would be a better choice to run form my predator? the 87 or 91 perf tune? It feels like I am getting more performance from the 91, but just wondering if there would be any negative effects like long term ...

Maybe we can start a new thread? I am pretty sure I am running into the same issues. I am hoping to play around a bit more once I get back from Germany.

So your implying it's all a scam ? I was disappointed when the tire fix didn't work for my WK, but it does now, and the tunes do make a difference on my WK.

I also have a modified TJ myself, I wouldn't even bother putting any type of tune on it, now with your electronic speedo I can see the need ...

Bingo! 31.5" worked. Waiting over a year makes this day all the sweeter.

I couldn't agree more. I have been trying to find all the posts I have seen in other forums of people staying away from the product because it didn't work.

Maybe sales will increase ;) At least the complaint file should ...

I set the tire size to 265/70R17 and it was off in relation to the speedo and handheld GPS. I set it to 30.5 as the tire diameter and 100km/h now shows 100km/h.

Sweet, it works on my 2010 WK as well. THANK YOU DS!

I am interested to see how the added MPG BOOST Tune works as well. I am wondering if an 89 Perf Tune would ever be done? Most people that I have read posts on use the 87 Perf Tune with 89 and get good results.

REALLY?! I have to go try it now...

Quick question. Has anyone with a 08+ Grand Cherokee tried adjusting tire size manually in an exported tune and then re-loading the tune to get the tire size corrected? Just wondering since we know the quick adjust before or after doesn't work. I want my speedo fixed for my larger tires dangit ...

Does u7137-9t12a.crom fix/add anything to the Grand Cherokee (2010) ?

Thanks

No luck on the tire size adjustments for the GC ?

I know I am in the same boat as most Jeep owners,

When is Diablo planning on fixing the issue with the tire sizes on Jeeps?

The primary reason I bought the tuner was to adjust the tire size, due to mods to the driveline I have made, I need a timeline, driving over the speed limits is starting to ...