Hi everyone, please can someone advise me on the problem im having with my Jaguar a type 2.7 diesel 2007. When I move from a standstill or when im gently going up a hill at low speed I get and incredibly shuddering, it is not from the steering wheel it is the whole car BUT when I give it more gas it stops. I have spent so much money on replacement parts but nothing seems to stop it and to be quite frank I think my mechanic is baffled as to what it can be, I have even had it on a computer but no error codes, I have maintained my car with regular engine and gearbox services.

Can anyone help with a diagnosis?

 

Any symptoms when the car is at rest with engine running ? If not, one has to suspect the gearbox or maybe the torque converter. There are no diagnostics for these so you won't get any fault codes.
How many miles on the car ?

 

^^^ Agreed. Probably the torque converter failing. Bent or broken fins can send the converter off balance and reduce efficiency.

If you get noise/vibration while revving the engine while in Park or Neutral, one test you could try is to disconnect the torque converter from the engine. That allows the engine to be run in place without the TqCv or transmission connected to it. Revving the engine again will determine if the trouble is within the engine or not.

 

hi Fraser, the car has 140km or 85,000 miles.
No at rest on idle the car is perfect and even when changing gears it is still so smooth

 

there is no shuddering in the car when revving it only when it is moving away or up a hill at low speed

 

Welcome to the forums Charles2483,

I've moved your question from General Tech Help to S-Type forum. This is the place for technical questions about your model.

Please read the guidance for new members ( https://www.jaguarforums.com/forum/n...ned-up-241802/ ) which answers many of the most frequent questions about getting started.

Enjoy the forums.

Graham

 

Hi Charles, I would suspect a gearbox problem from your description, possibly early signs of a clutch pack or band wearing, but it is only a suggestion as so little info to go on. If the vehicle was mine I would consider changing the transmission fluid for fresh. I think it is a sealed unit gearbox on the modern jags, so you'd have to do a bit of research for simplest way to do that on yours. I've had a few (american) cars that have had shuddery gears and replacing the old brown burnt fluid for some nice fresh red has bought me time in two cases. Having said that, in the car market I am what might be described as a "Bottom Feeder", usually driving some tired old thing, and my suggestion is the tpe of thing you'd do on an end of life vehicle. Good luck.

 

Engine and transmission mounts?

 

Prop shaft donut?

 

The OP really needs to get the car on a lift and have the driveline, transmission and mounts looked into by a competent professional. We can guess, but as already mentioned above, there are a number of things this could be...

To the OP, adding your general location to your profile helps us to help you. All we know now is that you are not in North America, because the "deeshul" variant was not sold here.

 

TC clutch (lock up) problems maybe?
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Hi guys I am just going to buy a torque converter and a gearbox and hope this stops the shuddering

 

Hi Charles - that's pretty bold, but covers a lot of bases. Good luck and please keep us posted on the outcome.

 

well im so heartbroken, I changed the transmission and torque converter, on the way back it started to shudder again so it isn't the gearbox, I think I have now reached the end of the line with This car, no one has any idea what is going on, I am in Poland and have tried all channels.

Does anyone have any clue?

 

I have heard of flywheel issues causing vibrations but I can't remember where I saw that.

 

To the OP:

Not to send you away, but this particular Jaguar forum is somewhat North America-centric; the diesel variant was never sold here. The "other" Jaguar forum (jaguarforum.com) has an S-type forum with members who actually own/drive cars similar to yours. Perhaps a duplicate inquiry over there might be prudent...

 

Without hooking up the factory SDD we really can't help?
We need to see what the car thinks is going on and without any SDD scanning this will be difficult and expensive as you have found out. These cars are too complicated to just start changing parts and the parts are all expensive too!

Is there ANY possibility of connecting the car to a SDD?
Otherwise I don't think we can be of any help?
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Hello,
thank you for your kind reply, the problem of connecting to the SDD is currently not feasible as the distance from a Jaguar service center is over 150 km.
My request is to know if after replacing the xenon lamp and verifying that the headlight assembly is not positioned correctly, but very low, it is necessary to perform a reset via the diagnostic socket.
Thanks, Bruno from Italy

 

BBG I think you will get better answers if you start a thread just about your problem?
This thread is about a shuddering transmission which is WAY far away from your head light problems?

If your that far away from a dealer you might consider getting your own SDD setup?
I had to do this because of the extreme costs of using a Jaguar dealer. It's complicated but I have saved many thousands of dollars using it.
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Charles, my heart goes out to you as you must be really despondent having changed gearbox and converter and not fixed. Drive shaft universal joint might be a cause of vibration/shudder; or prop shaft donut as suggested by another poster above (although that might worsen with speed, rather than go away maybe?). universal joints, if binding, you should be able to feel by hand with the shaft removed. Am guessing here but expect there are at least 5 UJs on a jag rear end? And that is something that is just some labour to check rather than more expensive parts. Or, as you say, take the philosophic approach and walk away - inward groan. Much sympathy from here in uk.