Got 2013 XFR-S and was thrilled with performance and love the car.
Had one minor issue, I felt a slight surging when stopped at light with foot on brake. However I noticed no increase in rpms or noticed any engine noise increase.
Car still has 2 years certified warranty left (reason I chose this one) so I took to dealer. They have had car almost 2 weeks working with "jaguar technical" to solve the issue.

Today I got this message from service advisor:
"The surge concern is a transmission function that will slightly slip the b clutch at a stop and will cause a rocking sensation. This is an emissions related function to reduce drag on the engine and transmission and cannot be disabled. After further review we have found out that pcm had an aftermarket tune by the previous owner. It is possible the tcm adapted incorrectly which is why this vehicle has this feature being demonstrated excessively. The zf field service engineers are all in Germany right now. Jaguar wants for one of them to come here to reset the adaptions on your car, they are the only ones that can do this."

Interestingly, I had been considering a tune and pulley for this car. Now rethinking that. Wonder if any of our tuning company folks can weigh in on this or if any members with ZF transmissions have had similar experiences.

 

That is absolute bullshit the dealer is telling you. I have had my vehicle tuned twice by two different companies (XF 5.0) and non of them was ever able to manipulate the TCU. Only the ECU and that should not tamper with your transmission behavior. If you want my advice change your Tranny fluid and do a hard reset.

Best Of luck

 

I have had 2 tuned jags (neither had XF transmission) and had no problems.
Interesting note, it is under warranty and dealer said nothing about ECU tuning being a problem. Although they did detect it (despite tuning companies saying they can't).

Didn't say TCM was reprogrammed. Just said it "adapted" after the tune. Weird.
That is why I asked some tuners to weigh in.
Would like to hear what they have to say.

 

If I recall correctly (and I may not) there are two sets of adaptions - throttle and TCM which are both supposed to "learn" how you drive and adapt. See what they did there ? AFAIK, the JLR SDD tool should be able to reset both or either. I call BS on their needing a ZF specialist.

But you could try the hard reset procedure and see if it re-learns....

 

IDK. It is at dealer and under warranty.
Gonna let them deal with it.
Why Jaguar insist they needed a ZF specialist, Jaguar is paying for it.
Not me.

 

I think that you have either a TCM or internal solenoid issue. Probably more of the latter that most Jag techs cannot diagnose other than doing a replacement. Jag techs don't do repairs on the ZF transmissions other than simple oil changes and spacer block replacements. So any wait for a true ZF mechanic is for specialized internal trans repairs. As for the tune, the SDD software should be able to reset and undo any tune.

 

Dealer says it is TCM adapted incorrectly after tune, but that could be a guess on their part.
Solenoid does make sense with the clutch slip becoming more pronounced and obvious. If it was opening or closing while at stop, would think it would cause something like the feeling of rocking.
I am sure ZF tech can figure it out. Until then, I wait and miss my car

 

Dealer is saying the TCM adaptations are not covered under warranty because ECU has been retuned to "non Jaguar specs".
XF tech will reset the transmission adaptations but I have to pay for 1-2 hour shop time for him to do the work.
Question they could not answer - if ECU caused TCM to "adapt" incorrectly, why wouldn't it reset incorrectly again after the ZF reset.
Frustrated with this mess.

 

Well that is a kick in the head then!

I want to make sure I read your post correctly? You purchased a car (unknowingly right?) that was already tuned? And now that tune has screwed up the transmission to the level that a special ZF Engineer had to be dispatched from Germany to fix it. He did fix it and they want you to pay the bill.

Now they are going to release the car back to you with the screwed up tune still installed?? If it was me I would back on the selling dealers doorstep toot sweet!

Did you buy it where the current service is being done?
.
.
.

 

No, I did not buy it from dealership where work is being done.
I did not know it was tuned.
ZF tech has not been here yet, will do resets when he is in area.
Car is a 2013 bought used. What recourse is there against seller?
Used cars are bought as is. There is no implied warranty.
I bought it because it still had 2 years of CPO with Jaguar.
However, they are blaming this problem on the ECU tune so therefore, no warranty coverage.

 

Just to be clear. You bought it and it currently has a tune? Or it is back to oem tune but they can detect that it previously had a tune on it?

Unfortunately that's the side effect of a tune. They can detect that it previously had one, and if they believe that's the cause of an issue then they are within their rights to decline warranty for that specific issue.

If it's just a couple of hours of labor time I'd just pay it and move on

Surprised someone tuned an R-S - is there much more you could get from a tune? Do you have oem pulley or was that changed too?

 

No apparently it still has tune on it. I think it is oem pulley.
Dont mind paying to have transmission adjusted, just worried that since tune is still on it will cause TCM to "adapt" again.
As of now, dealership won't flash it back to stock.

 

Ah - got it. If it were me I'd get the tube removed. Without knowing what it is, how credible the company is I'd be concerned. Why can't the dealer reflash it? Or do they just want to charge for that?

 

Dealer was reluctant to do anything until ZF guy looked at it.
Yeah, I wonder about tune and who did it.
However, This R-S is in perfect shape with several expensive options added. Hard to believe owner who spent this $ would go with some cheap unproven tune.

 

It may have been an expensive unproven tune. Sometimes those owners feel the "mass market" tuners are too "off the peg" and want something bespoke. The mass market guys however probably have more experience...

 

I think you may be correct.
However, interesting call from dealer today.
Jag tech there has talked to Jaguar technical dept more and they may have decided it is a valve body issue and are looking to replace valve body. That would be under warranty.
I will wait to hear more.

 

Let us know. There has been a lot of debate on here about how dealers treat warranty issues when the car is tuned. So will be interesting to hear how it gets resolved
Good luck!

 

If you ask me, the ZF tech is going to tell you that it is a totally different issue. Jag techs have no idea what ailments the ZF transmissions have, they only know how to replace them.

 

My guess also.
I have car home and am driving it. Odd to get call from dealer out of the blue about potentially replacing valve body.
Makes me think first diagnosis was just a guess and they actually talked to someone who told them they were off base with diagnosis.
One other thing I noticed.
When experiencing the slippage, if I shift to 2 manually, it stops.
Could be something with 1 gear.

 

Just got call from dealer, they are replacing valve body on transmission.
Think that is what is causing slippage.
Jaguar Warranty dept approved it and have appt on Monday.