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SUVs Jeep Liberty and Jeep Liberty Diesel Jeep Liberty Diesel Shift Patterns
19 messages, Last post on Nov 30, 2007 at 12:22 PM
You are in the Jeep Liberty and Jeep Liberty Diesel Forum. Your Hosts are steve_ & tidester
My TC only locks up in 3rd with the OD off  38 and 5th 50. I have been using the OD off and skipping 4th entirely. My mileage seems to be up a bit. I have been thinking of adding a switch to lock the TC when I want to. The TC has way too much "slush" for my liking.
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Replying to: thecip (Jul 27, 2006 4:06 pm) If you use above B-5 fuel you are giving DCX a way out of taking care of any fuel system part. In a 9 page letter DELPHI, BOSH, SIEMENS VDI, DENSO, STANDADINE, all signed a statement that their parts are are not to be used with any Bio Diesel above B-5 or the warranty is null and void. They go into very in depth information as to why any fuel above B-5 is not intended for their parts. If you think these people are not interested in making consumers pleases with their products, then go against their warranty advice. The cetane rating for any any Amacco premium diesel in not near what your friend states. Call for your self, do not rely on 2nd hand information. Call any truck stop and ask for the cetane rating, and maybe 1 out of 100 might have a guess. This information is not something most even care to know. If it's diesel, and they sell it, fill it and lets get out of here, is the way it works in the world of trucking. Farout
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After five times following what STAR told my tec what to do here is what we found out, and how we corrected it. 1st. There are no official shifting marks. DCX just didn't get this far in development of the CRD to do this. (if you don't know by now you have been part of a "test market" and you paid to be a part of it and did not know it) These CRD's are controlled a PCM which tells the power train what and how to do what they are to do. Every re-flash changes what it tells the engine and transmission what to do. Mine had over 6 re-flashes, and everytime things got even worse. My tec on his own ordered a new PCM and did not do the re-flashes. Bingo, it works good and no more shifting into 5th at 62mph and lock up at 65mph. Fuel mileage went from 20-22 mpg to 23-25mpg. that was 4,000 miles ago, we now have 17,700 miles on the CRD. Finally don't use oil above 10w-40w synthetic, 5-94 is preferred according to V M Motori. Why DCX says different is a question nobody seems to know why. Maybe it was a typo and no one dares question the higher ups? Hope this helps. I do like the CRD, I just did not know I was being used as a test market, we all had the right to know, this was delibertly with held from us. Did you know this was a very limited run of CRD Liberty's? Farout |
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Replying to: farout (Jul 29, 2006 10:23 am) My late father-in-law and brother-in-law were both long haul truck drivers in the mid-west so I am used to the diesel is diesel argument  Also, I was standing behind my friend (who is on this board but a silent member) when he called BP/Amoco. Now whether the tech was full of it is another story!! If he was selling a song and dance we bought it. I called Exxon/Mobile and Shell myself as my friend called BP/Amoco and Hess. Mobile and Shell both said their diesel is minimum 42 cetane year round. Fuel providers in the Northeast usually cut their diesel with K-1 in the fall and winter which lowers the cetane so their summer blend in theory should be higher. For now I'll stick with Hess.
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Replying to: thecip (Jul 29, 2006 11:48 am) http://www.biodiesel.org/pdf_files/OEM%20Statements/2005_DDC_Statement.pdf |
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Replying to: mdamick (Jul 28, 2006 6:32 pm) I know that the auto in it will go long before the engine and I have been inactivly looking for some parts for the european model. When this Auto starts showing any signs of age it is out and I am going ot replace it with the Euro 6-speed manual and clutch package. The switch to lock the TC is a good idea. I don't like all the bulky computer controls. Its like a congressional hearing when I touch the Pedal, fuel pump say "I want to pump more fuel", The emissions managment system say , "No wait what about the environment", The transmission says, "But what gear should I be in". I could probably get 30+ mpg if i didn't have all of this "SMART computer in my way". Instead of shifting when it makes since I messing around with speeding up in order to slow down. Its stupid. |
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Replying to: mdamick (Jul 28, 2006 6:32 pm) Thanks Mitch |
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New guy here, just adding my observations. I bought a 2006 CRD new on 1 Aug 2006, and have had good luck so far (14000 miles). My transmission in normal mode (as I understand it) shifts to 4th around 40, then locks the TC at 52 in 4th. Accelerating to 63 mph finally makes it shift from 4th to 5th with the TC staying locked. At first, I didn't "get it," and was worried that there was something going wrong at 63mph, then I counted gear changes and realized what I thought was the shift to 5th at 52 was really the TC lockup in 4th... I think the way it works in O/D off mode is great for towing, but is also good for cruising in the 40-50mph range when driving hilly streets. Rather than being in 4th with the TC unlocked and the revs varying widely, O/D off keeps it in 3rd but locks the TC to keep the RPMs relatively low and steady. I routinely use O/D off to accelerate from the lower speeds up to 50 or so, and then go to normal resulting in a shift from 3rd w/TC locked to 4th with TC locked in minimum time and keeping the engine where it seems to really like it. The few times I have towed a trailer, this worked really well and I was impressed with how well it pulled. I specifically avoided heavy throttle when engaging the O/D to take it easy on the driveline. If I could reprogram the shifting, I would have the TC lock in 3rd in normal mode, then shift to 4th the way it does going 4th to 5th. That may be too harsh for the internal components though? I really like my CRD, and hope it doesn't fail me now that I've boasted about it! 
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| Does anybody know if there is a programmer for the Jeep Liberty CRD that can access the shift points and TC lockup? | |
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