![]() Don't forget to ask the dealership to perform a "quick learn" which makes the transmission quickly adapt to the new shift schedule. 0L EcoDiesel brought a whole new level of versatility and fuel efficiency to the Ram 1500, Jeep Grand Cherokee. If you are at all dissatisfied with the way your Aisin shifts, especially in normal mode, please schedule an appointment with your dealership to get TSB 21-001-20 addressed. look up tech bullitin 21-001-14 alot of info on that web sight. ![]() I can live with this behavior, but I still think there is room for improvement in the shift schedule in tow-mode. service 4wd system - Hi ,on this jeep i have the service 4wd system light comes on alot. I understand why this behavior is desirable in tow-mode because the increased engine RPM helps with the engine brake, but it feels like the transmission should only skip a gear downshifting when the engine brake is also enabled. This results in a harsh down-shift and the engine RPM revs high. However, in tow-mode, the truck still shifts directly from 4th gear to 2nd gear or directly from 5th gear to 3rd gear when decelerating. All revisions are highlighted with asterisks and include additional vehicles, model years and caution in Repair Procedure. The Grand Cherokee has been assigned 1168 TSBs, the most of any Jeep vehicle. Overall, the truck is much more pleasant to drive in normal mode after the update. This bulletin supersedes Technical Service Bulletin (TSB) 3100119, date of issue July 31, 2019, which should be removed from your files. Description AR (1) 68084266AB Motor Kit, Axle REPAIR PROCEDURE: 1. I haven't noticed any more clunking noises when shifting into gear. ![]() The truck feels like it is always in the right gear with no hesitation.ģ. Automotive Recalls and Technical Service Bulletins for 2008 Jeep Truck Wrangler 4WD V6-3.8L. The hesitation in up-shifts and down-shifts is gone. The transmission smoothly slides into first gear without causing the truck to lurch forward.Ģ. Downshifting from 2nd into 1st is not harsh. Here's what I noticed in non-towing mode.ġ. I had the update installed on 1/22, and I've driven a couple hundred miles after installing the update. After getting this update installed, the Aisin shifts the way I expect it to (at least in regular, non-towing mode). I want to thank for announcing TSB 21-001-20 which updates the TCM software version to 68475153AD.
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