I have a customers 2014 XFRS (beautiful car) in the shop for transmission fluid service with metal pan upgrade and oil change.

Initially refilled transmission with engine off, then let idle until temp showed about 40c, Selected each gear for about 10s each, topped off fluid and reinstalled plug, very straight forward. With vehicle still in the air on lift, the engine was shut off (by my helper) with the vehicle still in neutral and selector knob up.

Now, with vehicle on the ground, when car is turned on neutral is flashing, selector knob is stuck and unable to turn and dash states “gearbox fault” with a p1707 stuck in neutral code.

to temporarily remedy the situation, I can go underneath the vehicle and move the selector arm on the side of the transmission manually back to park and it resets as if everything is normal.

it re trips the gearbox fault EVERY time you go BACK in to park. I can leave park normally and go in to any gear, but as soon as I return to “park” it faults again claiming gearbox fault with p1707. I have not tried to drive it yet because I’m worried it will leave me stuck, but may try to move it later.

I have tried the manual park/neutral release cable/lever which seems to be unrelated. I have tried accessing through my Snapon scanner, but functionality is limited without sdd/vci.

the only other thing I can find that sounds identical is another forum response says he had the exact same issue after a fluid service and had to rev to 2000 but it’s unclear wether he revved in neutral, in gear on lift on road etc. DSC will not let me spin wheels on lift even with traction off, unsure if it can be disabled completely.

any thoughts, ideas or recommendations are sincerely appreciated at this point. I’ve serviced dozens of 8HP units but never had any faults or issues.

my dealership is over a week out on service just to do the diagnostic on this and it seems purchasing/setting up an sdd is a little more time consuming than I can devote.

If anyone knows of a reputable source to purchase a complete diag solution from, I’d be interested in that, as well!

thank you!
Cheers
Ben

 

Well that is a weird and very uncommon error code?
Your in luck that our UK Jaguar friends have a thread right up your alley?

Not sure this will fix it but it will help to read this anyway. It is on an XF too.
Jaguar Code P1707 Error

Attached is a TSB and that's a strange issue to (Never heard of a "Ghosting" signal problem either?) BUT requires SDD to set things right. Any chance you can get access to a working SDD?

This next thread is for an AWD XE so NOT exactly the same car? But do note the comments about transmission fluid level and that code.
Note here is a description of this code from Jaguar. I want to say again that without using SDD you just can't get all the info needed? There are two additional numbers after the P1707 code and they mean different things. You can see there are actually at least 4 different versions of the P1707 code. Your car is not AWD but the Park/Neutral indicator is listed in all 4 codes too.




Here is the thread talking about the 2000 RPM and yea I don't know what he is talking about either?

P1707 Code Thread
I would recommend this might be a fluid level problem too but with your experience I don't think so? It appears you have the correct fluid level in the transmission.

Here is a Land Rover thread and again it points to the Park/Neutral indicator being the problem?

Land Rover with P1707

Here is what I would do? I would get the red release ribbon out and apply and release the transmission several times. One guy could see the cable going in a bit farther as he worked it. I see you have done this but try to allow it to "snap" back in if that makes sense?

Also attached is one more TSB but I think it's not too close to your problem but maybe good for background information?

I hope to hear your solution if you can post back?
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Wonderful amount of information here, much more than I was able to find through my automotive database. Sincerely appreciate the reply.

Just checked and it is a p1707-72 - actuator stuck open

I did notice the TSB so I tried engaging and disengaging the emergency parking neutral cable assuming that could be culprit to sticking as described in the remedies, but I believe I'm actuating it and nothing seems to occur at all. Now, I have only tried this while in a fault state stuck in neutral so now that it is back to the reset position again I will see if the cable is "sticking". Unsure of how or what the linkage actually operates, I had trouble finding most information.

It seems we came across the same post. I have checked the fluid level in this unit twice now, all steps carefully followed. Transmission at 40c, ran through each gear selection for 10s each with foot on brakes, return to park or neutral and allow any excess fluid to drain so fluid level is just at bottom of fill hole. ZF Lifeguard Fluid 8 was used, about 4qts went in.

My local dealership says they cannot get it looked at until Wednesday or Thursday and my local specialist's diagnostic unit is in for some type of repairs maybe returning later this week. I have been looking in to where to buy a complete diagnostic solution for my shop.

In the meantime, my local specialist and I agreed that the code present with the situation is very odd, so I am going to drop the pan and make sure nothing has been damaged or pinched for good measures, considering I am using an aftermarket "upgraded" metal oil pan. Our local parts supplier FCP Euro has lifetime warranty, even on fluids, so I don't mind a second go. I also have ordered an OE plastic pan for safe measure if I believe the metal one to be suspect to the issue.

 

Everything appears great inside. No metal on magnet, fluid is obviously new and clean, no marks from making contact inside on pan, no damage to harness or connectors, as far as I can see. I’ve attached pics.

Here is a PDF that describes exact procedure for fluid change from ZF. The 2000 RPM makes more sense now, but will have to wait until tomorrow for more fluid.

 

For reference, here is also a copy of the service procedures from JLR for X250 vehicles

 

Thanks for the info about the 2000 rpm. I have never seen that before and I have never done it either but I have NOT done as many fluid changes as you have.
Thanks for the added two digit code and it does point to the TCM. Still confusing as Jaguar wants you to "renew" the TCM? Replace or reprogram?
Seems hard to believe you caused a TCM problem because you changed the fluid??

That's the cleanest inside of a transmission I have ever seen! Looks brand new.
Love the steel pan and I had planned on changing mine to steel many years ago but I have to say the plastic pan works just fine and I have no problems using them now.

Sorry I was not more help and I will watch to see the solution...hopefully?
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looks like the OE ZF oil pan and (again) fresh fluid solved whatever issue was occurring. I’m honestly baffled at this one. I’ve inspected the aftermarket pan and it looks identical to the sump of the other just metal. This one has me stumped but I’m going for a test drive right now!

thank you for your all your assistance and input, it was truly appreciated

cheers!

 

Well thank you for reporting back!

Glad you changed the fluid and pan again but I would have never thought about that? Still can't believe the pan was the problem but you pretty well proved it was.
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