Transmission fault

[Russ066]

Ok went out to my car this morning it's a 09 disco 3 v6 petrol started it went to reverse out and transmission fault limited gears came up.on the dash car is stuck in park and will not move come out of park and other message is special functions not available. I haven't had a chance to get a landrover scan tool as yet only had the car on the road a couple weeks without any dramas any ideas pointing me in the right direction would be appreciated
Thanks Russ

[loanrangie]

Have you ever changed the brake switch ?
Try shifting out of park with the handbrake on but don't touch the brake pedal,do this after a shutdown and remove them re-insert the key.
I don't think it's a genuine trans fault but more a cascade fault because of another component.

[loanrangie]

Forgot to add that there is a release lever on the shifter under the console which I believe you can reach by removing the Rh cup holder.

[Russ066]

I havent changed the brake switch. I tried to move from park without foot on the brake and that didn't work but not sure if I removed the key or not will try that tomorrow after work
Thanks for your reply
Russ

[Russ066]

Ok so new brake switch didn't solve the problem looks like I need to buy a scan tool. Went to check fuses and check what I could make out were anything to do with my prob but can't really make heads or tails of the fuse diagrams. What scan tools should I be looking to get without killing the Xmas beer money
Cheers Russ

[Narangga]

Reading faults would be best but a starter battery that is not the full quid will bring up transmission faults.

[loanrangie]

Ok so new brake switch didn't solve the problem looks like I need to buy a scan tool. Went to check fuses and check what I could make out were anything to do with my prob but can't really make heads or tails of the fuse diagrams. What scan tools should I be looking to get without killing the Xmas beer money
Cheers RussWhat's your location, can't tell when using the app.
Cheap obd tool is from OBD2 Australia, $42 and works on my D3 and other vehicles.

[Russ066]

Im located in Perth. I seen some from obd2 for 220. I got one from them before for my amarok and worked well. I don't mine spending a couple hundred if it's gonna do what I need it to do.
Cheers

[BradC]

I'm North of the River and have Gap tool. I also have a generic OBD2 scanner from when my wife had a VW, but it's close enough to useless on the D3.

[Russ066]

Yeah Brad I tried mine.from the amarok and was useless. I also tried a cheaper one that my son bought was next to useless as well so gonna need to add another one to my collection of scan tools.

[loanrangie]

Im located in Perth. I seen some from obd2 for 220. I got one from them before for my amarok and worked well. I don't mine spending a couple hundred if it's gonna do what I need it to do.
Cheers

Autel make reasonable priced ones that work on LR products, don't know the model number but are sub $100.

[Russ066]

Ok I have a code P0748 pressure control solenoid A electricial
Where the hell do I start to look for that

[PerthDisco]

Ok I have a code P0748 pressure control solenoid A electricial
Where the hell do I start to look for that

Google

Auto Transmissions R Us in Balcatta specialise in these units. Does it have any history of oil changes?

[DiscoDB]

Google

Ouch. [emoji38]

Also from the D4 manual:

https://uploads.tapatalk-cdn.com/20231214/e4f64979d881d2c18c7dac4923aedba8.jpg

[PerthDisco]

Ouch. [emoji38]

Also from the D4 manual:

https://uploads.tapatalk-cdn.com/20231214/e4f64979d881d2c18c7dac4923aedba8.jpg

There’s actually nothing to suggest it’s a common ZF / Disco problem so possibly an easy fix but well worth getting the basics done in a good service. If no service history the oil is probably like molasses by now.

[DiscoDB]

There’s actually nothing to suggest it’s a common ZF / Disco problem so possibly an easy fix but well worth getting the basics done in a good service. If no service history the oil is probably like molasses by now.

Agreed.

A google search shows it is a common fault across many brands. Often just due to bad electrical connectors.

Worst case is the solenoid has failed, but given the experience with the D3/D4 would point to a bad connection somewhere.

[loanrangie]

Could be a leaking mechatronic sleeve allowing fluid into the connector, a fluid change and check of the connector would be where I'd start.
Then new solenoids and valve body rebuild.

[Russ066]

Thanks all for your replies, I have got it going again at the moment and booked it in for a transmission service unfortunately can't get it in til late Jan but better than not at all
Thanks again
Russ

[loanrangie]

Thanks all for your replies, I have got it going again at the moment and booked it in for a transmission service unfortunately can't get it in til late Jan but better than not at all
Thanks again
RussFluid change is a simple DIY job, the plastic pan/filter is harder if fitting the same again but the steel pan conversion is easy.

[Russ066]

Yeah I reckon I'll do the fluid change next and see how it goes from there thanks loanrangie

[PerthDisco]

Yeah I reckon I'll do the fluid change next and see how it goes from there thanks loanrangie

Here’s a gearbox similar issue and repair

I Fixed a Mechanically Totaled $700 Range Rover. Here's How Much the Repairs Cost... - YouTube (https://youtu.be/Tf9XSxHVwkg'si=oGgZJh8Mmyug9ooD)

[DiscoJeffster]

So if I had have videoed my zip kit install I too could have been a YouTube hero?

[loanrangie]

So if I had have videoed my zip kit install I too could have been a YouTube hero?

Yeah we missed the boat on that one, have to just do something stupid then.

[PerthDisco]

So if I had have videoed my zip kit install I too could have been a YouTube hero?

If it’s not on YouTube did it ever happen?

The fault of being stuck in 3rd and fault code closely matches the OP issue.

Isn’t there one part of the Zip kit beyond the home mechanic level needing some special tools I thought? The video makes it look quite simple but even making sure you have exactly the right kit for your ZF6 takes some care to work out.

[DiscoJeffster]

If it’s not on YouTube did it ever happen?

The fault of being stuck in 3rd and fault code closely matches the OP issue.

Isn’t there one part of the Zip kit beyond the home mechanic level needing some special tools I thought? The video makes it look quite simple but even making sure you have exactly the right kit for your ZF6 takes some care to work out.

Yeah you’re correct. If you truly refurb the mechatronics there are various vacuum tests to perform and valves that need overboring and new parts. Putting the seal kit through is a basic service, but yeah, a complete overhaul has to be done professionally

[Russ066]

I watched that video perthdisco and I think that's what mine needs but it's a real strange problem. Every morning I go out and start the car I get the code if I drive it up the road a k or so pull over clear the code remove the key put key in and start the codes gone and car drives as normal for usually the rest of the day no matter how many time I start and stop it, I've done the transmission flush and that didn't make a difference, I've checked cleaned all elec connection I can find so all I have left from my limited knowledge on the d3 is to replace the solenoids
If anyone has any other ideas it would be appreciated
Cheers Russ

[loanrangie]

Definitely rebuild the valve body,new solenoids, separator plate and zip kit.
Unless the galleries in the valve body are badly worn or scored the zip kit will repair any internal leakage as the replacement plungers have orings where the originals don't.
Even as worse case the box needs a rebuild you would do the valve body anyway.
Locking in 3rd is the failsafe and I found that when it did fault and go to 3rd that apart from being sluggish til the speed increased , it had plenty of acceleration which hints to the box being mostly still sound.

[Eric SDV6SE]

The o ringed seals and valves in the zip kit solves most issues. You can get the reaming kit that needs a jig to ensure the bore is done correctly, but my thinking is that if the vb is that far gone, better to get a new or reco'd one.

Definitely get new solenoids, they get blocked and cannot be easily cleaned,