I have a 4.2 w/49K miles, got it at 46K it had been well cared for, I've replaced Trans fluid ( $24 a qt with 12 qts Shop used a BG machine )and all fluids, spark plugs, brakes rotors, a/c recharge and other age related issues. But this issue has happened both before and after Tranny Fluid change, To be honest not sure if I'm the problem, Issue occurs only under passing speed acceleration after driving in 6th gear, if I slowly boost speed no problem, if I J-shift to 5th and press hard no problem, when I do get 6th gear fault, I pull over to side of road turn off engine and start backup drives perfect. Also going from drive to reverse after coming to a stop seems to take 2-4 seconds, again I don't know if its me reading to much into it or if its the start of a problem, any advice?? Tips?

 

If you're getting an error message on the dash then it's very likely that a DTC (fault code) is being logged.

You need to read those codes. A generic OBD2 scanner may not see all the codes, ideally you need an IDS, SDD, WDS, or a specialised Jaguar scan tool like AutoLogic, or maybe an i930 or NT510 will see them.

Without the codes it's hard to say for sure what the problem might be.

46k miles is nothing really, so there must be a problem, maybe software, maybe hardware, hard to say without making the right investigations.

 

A free check - see if the 2 bolts holding the shifter cable to the trans are there and snug. About 8mm hex.

 

Will do thanks,

 

I have a OBD MX scantool but need to purchase better software to read with, the free software is worthless,, back to school and money tight this month,, is there a Good Jag software for generic obd readers. again super thanks for advice.

 

Finally took car to Jag Dealer for service, and I feel I had a Huge waste of time and money, As they told me afterward they don't do any real repair work on the Tranny, and if their's a problem they only swap them out (at $10k), To make matters worst, they told me I had no 5th gear, and they test drove it to verify, My dad asked twice about this point, and wanted to hear explained, how when you use J-shifter or sport mode you can verify with Tach it up shifts to 5th gear, if you shift out of J-shifter or sport mode, Into normal drive mode it switches to 6th gear, you can go back and forth down and up verifying.

Now in normal drive mode it does switch rather quick from 5th to 6th gear, unless you are hard accelerating from a lower gears then it holds 5th as it revs to 6th, My dad tends to think its just saving fuel, but the service tech told the service agent rep we had no 5th gear at all, and it was going from 4th to 6th,, We couldn't question them directly on this. or ask for a ride through to show our concerns. So what do you think?
Our Ppwk States more than what was said to us, the main points as follows (See photos)- Slips through 5th gear connected IDS, code P0730 set gear ratio fault P0735 set gear fault 5th gear, trans internal fault mechanical fault and or control valve block fault

 

I take it your not happy with Jag dealers!

Lets go back to the beginning.

are you still getting the delay when moving into reverse?

Did the shop you took it too for the transmission and fluid change correctly refill the transmission?

Did you have an oil leak from the transmission, to begin with. The sleeve O rings tend to go and cause leakage of transmission fluid.

Have the transmission level checked by someone who knows what they are doing.

You state you do have 5th and 6th gears sometimes.

I would clear the transmission adaptation and check you have the latest trans ecu software, which may(will) require a visit to your friendless Jag dealer.

If you speak nicely, they may give a discount, or look up on the vin no. for the the service history on the car and tell if this has been done in the past.


All the above, fluid level check and clear adaptation, and confirm latest trans ecu software. are the cheaper options.


from there on things could start to get expensive


Good luck.

 

I asked the Jag dealership to check to see if I had latest software updates, they told me they only had updates for newer Jags,, after 2009, ( I had bad feeling from that point )so couldn't confirm latest trans ecu software, as they are the only dealer in Phoenix area you can see how I felt, $160 was for nothing. I told them I got scanxl pro last month for my OBDII reader, and knew the error codes just not sure what it ment.
Also after summer Lifeguard 6 Fluid change, no more reverse issue, and no leaks,, totally dry from all viewing angles around trans, after talking with a few shops, one stated sport and J-shift modes force more pressure on tranny to shift, but there may still be a problem in normal drive mode. to be honest almost everyone gives a different opinion, and most want several hours dropping trans and looking it over, to hopefully tell me, what the problem is. You get to the point of not knowing who to believe and seeing a lot of money getting used up in process, I found this info web page - Common Problems Associated With The ZF 6HP26 Automatic Transmission..., in 2001, it was the first 6 speed automatic installed into a passenger car, While the ZF 6HP26 automatic transmission is a strong (440 ft-lbs capacity) and well-built transmission, there are still some common problems.....(a lot of them)

After reading more I decided to go a remanufactured route.

As re-manufactured ZF 6HP26 now include modifications and upgrades designed to make them more durable and address some issues early model units have, at least I hope so thanks if you have info on tranny removal please pass along.

 

Hope you don't need a another transmission as that ZF is expensive.

Here is a place I got my fluid and parts from. Klaus is an ZF expert and you might consider buying one from him.

Genuine ZF Parts

But he could also give some input to your error code?
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