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As technicians, we not only play "doctor" on these vehicles, but also detective, engineer (sometimes reverse engineering something to find the issue), and even scapegoats for corporate "issues".
The repair service also raised the wehicle and checked for vibrations while vehicle was up. They confirmed vibrations - means involvement of tires, road and wind were eliminated.
The repair service then did more detailed vibration analysis and probably took apart transmission and front drive train for tolerances check (if they do warranty fixes they are not obliged to tell you what they did and how they fixed it..). They found no problems again. So the official message is "we found no problems and vibrations you feel may be caused by switching the HEMI cylinders". I dont believe that, because vibrations neither depend on engine revolutions nor switching cylinders. As written before, I believe they depend on actual speed of car, thus are related to parts that are affixed to shaft and wheel axis.
When I got the car back, it seems the problem is partially fixed, so I think it may be improper mounting during manufacturing process - dismounting and remounting may partially fix it.
I am not quite sure what to do next. Either I can take independent court analyst and cooperate with him in court actions against the service, or I can wait until the problem appears in Technical Service Bulletin and then have it fixed under warranty. I would not risk paying by myself to change front or rear drivetrain as I am not 100% sure it is the cause of problem.
Checking the vehicle in the air changes driveline harmonics as the tires are now free spinning (no friction from the road) and driveline angle is different. It also changes suspension and driveline geometry. Checking for vibrations at a specific speed requires that the vehicle be on the road at ride height. Can it help - if the tire/wheel is severely out of round...you'll see it...but other than that - having it up in the air isn't going to help much.
As for repairs under warranty - the dealership does have to inform you of what was repaired - any parts used for warranty work have to be documented on the work order anyway for warranty claims to be paid. If there was nothing on it, request a copy of the technicians notes on the shop ticket.
I'm not trying to defend the dealership but as a service tech (and dealing with one of these specific issues), it's definitely not an easy one and claiming one fix for every case isn't the correct way about it. I've gone over a vehicle now with a runout gauge on just about every point on the driveline - everything is well within normal limits and now have requested that a Chrysler Engineer/Field Tech come out and look at it with me. I'll post what we find but remember, a fix for one specific case isn't going to necessarily be the one for all.
Has bought Jeep Grand Cherokee Limited 2000ã. 4,7ë. a box the automatic device.
We in city do not have service on these machines.
At me a problem with a back suspension bracket + with a back reducer.
Very much you I ask give the reference to a site where is detailed instructions and step by step diagrams for all workshop procedures of repair of these units in figures or photos with the description of work.
If you have opportunity I shall be very grateful.
Yours faithfully to you Oleg. e-mail: GELO2006@inbox.ru
Excuse for bad English.
(Çäðàâñòâóéòå! ß èç Ðîññèè (g. Kirov).
Êóïèë Jeep Grand Cherokee Limited 2000ã. 4,7ë. êîðîáêà àâòîìàò.
Ó íàñ â ãîðîäå íåò ñåðâèñà ïî ýòèì ìàøèíàì.
Ó ìåíÿ ïðîáëåìà ñ çàäíåé ïîäâåñêîé + ñ çàäíèì ðåäóêòîðîì.
Î÷åíü âàñ ïðîøó äàéòå ññûëêó íà ñàéò ãäå åñòü ïîäðîáíîå ïîøàãîâîå îïèñàíèå ðåìîíòà ýòèõ óçëîâ â ðèñóíêàõ èëè ôîòîãðàôèÿõ ñ îïèñàíèåì ðàáîòû.
Åñëè ó âàñ åñòü âîçìîæíîñòü ÿ áóäó î÷åíü áëàãîäàðåí.
Ñ óâàæåíèåì ê Âàì Oleg. Ñâîé e-mail: GELO2006@inbox.ru
Èçâèíèòå çà ïëîõîé àíãëèéñêèé.)
I started this post years ago and have spent countless hours and miles trying to find the problem with my 40,000.00 vibrator. I thought about 30,000 miles ago I found the problem. I was told I had "flat spots" in two tires. So I replaced the POS Goodyear tires with a larger, heavier tire by Cooper. I thought all my problems were solved. The vibration was gone, and i posted a message years ago about it. Come to find out the tires I put on my jeep were up for a recall due to seperation and cracking in the rubber...just my luck! Cooper offered me a large credit to a tire of my choice. I went with a Michelin and immediately noticed the good ole vibration again! I was pissed to say the least. Since Gustav was beating down our door and the wait to have the tires checked was 5 hours I sucked it up and drove back to Texas with a back massage. The light at the end of my tunnel came when I went to Discount Tire and informed them of my situtation. Jose the service guy informed me of the machine they use to balance tires and rims. He told me each Discount Tire only has one machine ( its called the 9200....or something like that). What the machine does is find the heavy spot on the rim and the heavy spot on the tirs and offsets each heavy spot by rotating the tire 180 degree from the heavy spot on the rim. I thought it was hard to believe but I will testify it works. My 05 Hemi has never been this smooth. If this interest anyone and a Discount Tire is within reach ask for a "computer spin balance" AND "Computer Ride Match". This was the only time i ever spent 96 dollars on balancing tires and it was worth every penny!!!!! Also after changing my tires to Michelin I am avg. 23-24 MPG highway traveling 65MPH.
P.S. IN MY OPINION******** "Started noticing a vibration at between 70-75 MPH I had never experienced before. ....Finally, after a third time at the dealer, they mention its the MDS feature. When only 4 cylinders are running, a "harmonic change" in engine operation is introduced and this causes the vibration (however, it seems odd that only 4 cylinders would be running when I believe I am accelerating). The Chrysler tech rep. said this is within normal operating parameters," ********* ummm yeah.....it states in the manual the engine runs on 4 cylinders between the speeds of 40-60MPH........and only after it travels 5 miles.........yeah.......I think the Chrysler tech rep needs to read the manual.......again thats just my opinion.
I bought an 05 JGC loaded with a hemi and noticed a vibration at highway speed 75mph (but is present from 60-80+). To some it up I have exclusively serviced my jeep with Jeep and have done everything to assist the dealership in eliminating the easy causes. My Jeep currently has new tires, two new rims, and new brakes/rotors. The tires have been balanced many times and the truck has been outfitted with test tires to rule out a tire/rim balance issue. the dealership replaced my rear driveshaft, but it still vibrated when I picked it up. Jeep then got an engineer involved who put vibration sensors on the car. Determined that the vibration was coming from the rear. They spun the rear prop shaft several time s but vibration persisted after four moves. They then replaced the rear ring and pinion gears, both pinion bearings, set preload and backlash and replaced the rear axle pinion flange yolk. Vibration remained as documented by tech after all work was complete. The regional rep did not allow anymore test and told service manager that the engineer said it (the vibration) was within acceptable tolerances for a 4 wheel drive vehicle at 75mph. This is currently an open case under warranty and my Jeep has 33,000 mi. This is Jeeps flagship Grand Cherokee and should not shake my hand on the wheel at 75mph with passenger seat visibly shaking when unoccupied. I love my truck but this shaking is unacceptable, had a 2000 JGC that didn't shake at all at these same speeds. Any advice???
Called the Jeep and still have an open case. Waiting for a call from the dealership to coordinate another evaluation to further investigate.
I could use any help you could provide me.
Thank you
I see these vehicles (different configurations) on a daily basis at the dealership and while I agree there is a slight vibration, it seems to vary in severity from vehicle to vehicle. Is this a "normal" vibration...hard to say. I've done quite a few things in order to eliminate the vibration and nothing works the same in each case. Blaming it on one item for all models is silly as i've changed driveshafts on one GC and then a tire rotation on another...both calmed the vibration but both required different apporaches. Personally, the Jeeps have vibrated in one way or another since the late 80's - driveline whine, "floating" on the highway (solid axle design), and now vibrations at certain speeds. These are NOT luxury SUV's...they're still Jeeps and are not a super refined vehicle. While the creature comforts are optional (power this/that, etc.), they're still a JEEP.
The only other thing which comes to mind is tire selection. While the OEM tires on these vehicles are good, there are much better options which also ride smoother and help absorb more of the road and suspension harmonics in the process (GM was notorious for this back in the early 90's on their trucks).
Wish I could help more...but unless someone wants to redesign the Jeep chassis, it doesn't look like there's going to be a solid fix any time soon.
Your Mich tires should not have more than 1/2 ounce of wheel weights
if they do the wheels them self are the problem
the plastic cladding is part of the problem
I had the same problem 1 year ago, now 8000 miles of my 2007 Jeep GC limited hemi
all new Mich tires were installed 1 bad wheel was found
1/2 oz weight is all 4 wheels NO Vibration since
Good LUCK
I here a lot of talk about rims and tires, which has been ruled out with my vehicle, as they trouble shoot my truck using shop balanced tires and rims to rule out any tire/rim related vibration. I drive from upstate NY to Philly frequently and have extended drives along flat and hilly terrain, but the my Jeep Limited Vibrator continuously shakes. My passenger seat visibly shaking the entire time.
My Jeep seems not to be shifting as gracefully when traveling through the mountains in PA. At 43,000 miles this truck seems to be falling apart, my 2000 with 165,000 had less problems.
I am sure other jeep owners are in the same boat with an inability to unload this vehicle, because their resale price is rapidly decreasing. If they could fix this vibration that would make it sooooo much better. I wish I could post a video of my passenger seat vibrating while I drive on the highway. Check back in a week or two, I will post a video on youtube.
Sorry for the rant, but my purpose is to gain any information that people have had luck with solving this problem! I don't expect perfection, but this is unacceptable
I feel your pain! I have had the same problem for years as well. May I suggest two options. 1) Don't listen to the dealership! They will continue to tell you over and over again saying that they have tried this and tried that. For me it didn't work! I even had the owner of the dealership test drive my jeep and noticed the problem. Like i said in the past I changed tires...twice. Replaced the drive shafts...three times.....or so they say. They, the dealership, even claimed they switched rims and tires and had the same problem....i dont believe them. 2) Get a second opinion. I finally found COMPLETE satisifaction with a "computer ride match" balance from a local tire shop called discount tire. I am not sure if they have them in your area but it WORKED!!!! It was the most expensive balance I have ever had on my Jeep but it is much more enjoyable to drive now. Give it a try......it cant hurt. If you have any questions please ask.
I think everyone knows that the Jeep is a POS... the trade-in value of this "CAR" is half what I paid for it...15K and it is only 20 mos. old! Will never make that mistake again.
Does anyone have any info why this happens every single yr? I love my jeep but it is really looking like it wasnt worth it, to have to keep dealing with this situation every single yr. Not to mention that in summer i can't roll down my windows because the regulators blow out on all of the windows and thats around 240 to 280 a pop to fix, i live in vegas, so maybe the heat causes all of these problems i'm not sure, but it is huge pain in the [non-permissible content removed], like i said any info is very very welcomed thank you.
I suspected it may possible problem related to Jeep Chrome- Plated Moduflex wheels. As Jeep stopped to use it on 2008 because of vibration problem. I am still not sure if this may cause the problem.
Since I purchased from dealer then I drove to Goodyear dealer to replace set of tires from Fortera HL to Fortera SilentArmor. The vehicle become problem with 70-75 mph vibration. I had Goodyear to rebalance the tires three times and still have same problem. I gave up and bought the vehicle to Dodge Jeep service center. They replaced driveshaft and inspected everything. The problem was not solved and then they replaced tires with Bridgestone Dueler H/L. The vibration problem remained as same with Goodyear tires. Then Jeep service decided to replace with Michelin LTX M/S tires. I was very surprise as vibration disappeared completely on any speed. I asked service man why it happend and he said he did not know why and just followed Chrysler engineer's recommended. I have my Jeep for three years and still not know why as asked Goodyear, Bridgestone, Michelin and Chrysler same question and they refused to answer my specific questions????
I suspected it may possible problem related to Jeep Chrome- Plated Moduflex wheels. As Jeep stopped to use it on 2008 because of vibration problem. I am still not sure if this may cause the problem.
I had exactly same problem with GC Overland 2008. Jeep dealer took it apart, they even send some parts for special balancing. Then they returned car back saying they did not find anything wrong and that it is caused by switching the HEMI engine. I also got "official" leter from Chrysler that it is a normal behavior (what a bullsh*t!).
However, when they returned the car, the problem disappeared. Therefore I suspect that they know it is some kind of design flaw and they fix it secretly so they do not have to recall many cars.
Keep pushing your dealer to have main axis (I do not know the proper English word, it is the big one that goes from front wheels to rear) re-balanced.
Jan
Thanks
i have a 1994 JGC. I started hearing a knocking noise first turning right n loss of turn radius. Then the left side. Took in and the drive shaft head was all chewed up. Replaced it and once again it sounds bound up. Any suggestions.