Request for Advice from Africa! Clunk / Thump when switching from Park (WH CRD)

aljazzair

New member
Hello everyone,
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I am in negotiation for the purchase of a Jeep Grand Cherokee Overland CRD 3.0 of 2010 (less than 60,000 miles). This car was built in Graz Austria (to Euro specs).
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It seems to be in very good condition, overall.
Car handling is very good and I have not experienced unusual/creepy noises during the test drive.
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The engine is super smooth, does not sound like a diesel! More like a beefy petrol engine ;-)
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The OBD diagnosis is clean according to the seller (plan to make a fresh OBD diagnosis before closing the deal however).
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I have detected one cause of concern with this vehicle:
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When the vehicle is stopped, when switching from PARK to REVERSE then NEUTRAL there is sort of a thump/clunk noise clearly audible from the cabin... it happens every time ...
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No noise in the opposite direction (from N to R to P), or when switching from NEUTRAL to DRIVE.
No Noise during the test drive, transmission was very smooth. No noise from the driveline on street/highway and even during a short drive off road on a bumpy track.

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According to the seller, the transmission fluids were never serviced.
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The car was taken for a quick inspection to a local mechanic I know who specialize in Jeep GC, although he mostly services older cars (ZJ/WJ). This mechanic told me that the transfer case could need replacement. He offered to sell me a used TC for 2000 USD :)Wow1:).
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The mechanic did NOT jack up the car to inspect the underpinnings.
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My own research on various forums devoted to Jeep WK / WH CRD does not suggest a new transfer case is required in these circumstances.
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The information I got on the internet tell me that in this case (thumping noise from P to N/R), a simple change of wear/tear parts should be enough to resolve : replacing U-joints or silent blocks maybe (a fairly inexpensive operation ).
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Some Mercedes ML forums talk about a normal thumping sound on Merc transmissions when switching from P to N / R that are due to a choice of solenoid by MB (?). The consensus is this sound happens even on newer cars and that it's nothing to worry about.
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Apart from the noise when switching from PARK to Reverse / Neutral, I did not notice anything unusual on this vehicle sold by a private seller.
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Before making the purchase, I read a lot of info on this forum written by current owners, and the consensus is that its a fairly reliable car with proper maintenance.
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Has anyone of you guys experienced this kind of noise when switching from Park into R / N?
Any clues as to whether this really involves replacing a TC?
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Any help would be much appreciated!

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Some more info:

I live in Algeria (in Northern Africa) & it is a pretty rare vehicle over here.
We have no official representative of the Jeep brand (Jeep brand used to be carried by the local MB dealership, not anymore).
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Therefore I need to be extra careful before buying and stay away from any issue that could immobilize the vehicle pending the import of heavy parts.
If a problem is trivial, it can be solved locally & as long as the car can run for a few months without further damage, I can take it to a Jeep dealership in southern Europe fo full servicing.....
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This Jeep is fantastic to drive, I like it very much and it would be ideal to explore the Sahara in total comfort. Maybe even an expedition across Africa one day... From Algiers to Cape Town!
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If a buy this car, I promise to post some nice pics of the mighty WK/WH cruising from the Mediterranean to the Sahara desert
:ylsmoke:
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Thanks in advance for your kind feedback!
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(PS Sorry for the lengthy post and for my poor English skills hope it's not too bad!)
 

Outside somewhere

Overland certified public figure brand ambassador
Could be anything from worn/loose engine or transmission mounts, bushings or some type of internal issue with the transmission itself. Does the jeep have any service history at all? If no that is something to use when determining how much you should pay for sure. How is the undercarriage? Is it all beat to hell or is it in good condition for the jeeps age? It could be a simple fix but as you stated getting the parts might end up costing 2 to 3 times what they would be in another part of the world due to getting them to your location, any duty on them plus their installation. Not sure what a vehicle like this would go for there but with that issue and my piece of mind it would have to be fairly cheap and I would see if I could get a second mechanic/transmission specialist to give it a look before I did anything. And you are right to try to pull any stored computer fault codes. Someone could wipe these so if you can drive the vehicle around for a short while then try to read the codes you might discover a preexisting issue. Good luck.
 
Last edited:

aljazzair

New member
Request for Advice from Africa! (WH CRD) +pics

Hello,
Thank you all for your kind feedback and sorry for the late reply.
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I finally saw the car again yesterday.
Was planning to close the deal and took it to a Mercedes dealership for a fresh OBD scan as well a as general health check prior to parting with cash. ;-)
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To my surprise, the MB dealership had extensive history on this car.
Among other things, it appears the ECU ("central computer" is what they said) was replaced in July 2014.
At that time the car already had 75k miles, but apparently the mileage was reset somehow according to the MB tech.
In Feb 2016 the car showed up at the local MB dealership with 51k miles on the odo (!!).
Less than two years before (!!). Apparently there was a problem with injectors that was solved.
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The MB tech says there is nothing wrong with the car except the mileage shown on the odo is not real.....
Last July it had 58k miles on the odo when I first saw it. Today it says 63k miles.
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I am considering offering much less than the asking price in light of the mileage issue...
If I understood the MB tech correctly, in a nutshell:
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Car had 75k miles in July 2014, ECU was changed and mileage was reset, now it has 63k more -->> 138k miles total.
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Would you buy a 2010 WK CRD with such high mileage?
If so what approx value would you put on it ;-)

Some pics:











 
Last edited:

old_man

Adventurer
Probably the most common source of the sound you describe is a bad u-joint in the rear driveshaft.
 

SSF556

SE Expedition Society
Sounds like the diff bushing could be bad...but given the mileage has been adjusted would be a bigger deal to me. As the owner of a WK with the Mercedes it is a great vehicle, but does have its design limitations. Space for one thing is limited and I think it makes a great North America vehicle...not sure it is a world vehicle.

There are so many options in Africa....not sure the WK would be on the top of my list.
 

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