Rotary Gear Selector Stuck

[INter674]

Well after praising my MY14 D4 SC Disco to all..it's already let us down😐

Wife went shopping and when parked could not select P with the rotary selector which was jamned up in D. The D symbol was flashing and the green range light came on and off. Later a gearbox failure message came up on the display. Could not restart the engine cause we could not select P.

Well after several hours of searching the net and speaking with the indie down the road and trying eg hard reset...jumper leads etc we decided to tilt tray the car to the Hobart dealers. My first ever tilt tray experience!! Thanks LR. ..

I scanned the car with the Gap tool but nothing special came up cept the usual steering calibration error which has been there since buying the car. I did a fault clear anyway but no change.

Dealer had no ideas as to cause and the techs had left for the weekend so it will be Monday b 4 they can examine the car in detail.

Anyhow it looks like the rotary gremlins so often reported in the US with early Jags has struck in Hobart Town.

Could be a v expensive exercise as the rotary unit alone is well over a k to buy🙄

Wish me luck!!

[John_D4]

Bummer. Keep us updated?

[ATH]

I'm not entirely sure about this but thought I'd read somewhere that there's lever underneath the coffee cup holder which can be pulled or turned to fix this for towing etc. Same area as when the damn useless EPB craps itself as mine did.... mumble mumble useless bloody thing. :(
Good luck anyway.
AlanH.

[DiscoJeffster]

Well I guess that’s one positive of having the “crappy” six speed - manual lever to select with. Sorry to hear mate but get used to it. It’s Land Rover life. It’s like the delinquent child - you want to walk away, but they’re family. You’ll keep giving them unrequited love.

Stolen image but [emoji3059]

https://uploads.tapatalk-cdn.com/20191115/f526d46fc1f17119cd0c1467b5fd53d9.jpg

[Mattblack59bus]

Hi All,

I have just had this happen to my 8 speed D4, im in the process of writing up a fix for it (well how I fixed mine) and also how to get it started and get home with the problem when it happens (all you need is a T20 torx driver & a touch of bravery).

You can buy second hand rotary units for AU$100 on ebay including shipping from the UK, but in my case I fixed it without expense.

Cheers
Marc

[John_D4]

Hi All,

I have just had this happen to my 8 speed D4, im in the process of writing up a fix for it (well how I fixed mine) and also how to get it started and get home with the problem when it happens (all you need is a T20 torx driver & a touch of bravery).

You can buy second hand rotary units for AU$100 on ebay including shipping from the UK, but in my case I fixed it without expense.

Cheers
Marc

Would you mind please putting a link to your write up on this thread when you’re done?

[INter674]

Please post your fix ASAP😎

I'm not going to lash the cash with Tilfords unless it's absolutely necessary!!

I'm actually itching to pull it apart...wished I'd sent it home now😐

Yes it does have the red lever to put it into neutral but that did not release the stuck rotary controller.

Maybe the last owner spilt latte down the console😆

[LRD414]

Apparently 30 seconds holding the up gear shift paddle when ignition is on (not running) will raise the rotary dial. I haven’t tried it myself and it may not work on the opposite issue that you seem to have but testing that may be worth a try.

Cheers,
Scott

[INter674]

Na..tried that. In any case ours is stuck up.

We had three guys googling for an hour then the RACT man turned up and guess what..he Googled it too😅

So everything he found on the net we'd already tried..so he gave in to the tilt tray option real quick saying..all I know @ these cars is how to pull the red cord. .which is what he did. ie to get it into neutral to get it onto the truck...

Glad I got Roadside Assist...got my premium money back already☺

[Mattblack59bus]

I'm still writing my instruction, if you need help now give me a call or send me a message (I've PM'ed my number) and I'll step you through my fix, although my problem did list a fault with the Gear selector shift lock solenoid, it wont fix it if you have a fault in the transmission itself.

The fix does involve pulling the TCS (Transmission Control Switch (aka the dial)) apart, so that will keep you happy. Ha Ha!

Cheers
Marc

[Graeme]

.all I know @ these cars is how to pull the red cord. .which is what he did. ie to get it into neutral to get it onto the truck...At least he knew how to do that! Many early D3s were dragged onto tilt trucks with the gearbox still in Park.

[INter674]

Okay so I've done more research.

The rotary controller has and is proving problematic around the World for both LRs and Jags. Main issue has been circuit failure causing lock outs as well as led failures causing the green ring light to go out or flicker. LR has issued service bulletins for these and will replace the Trans Control Switch for free IF under warranty.

Unfortunately if no warranty then the dealer replacement is likely to cost well over a grand.

Seems the lock out mechanism loses power causing the solonoid to relax thereby engaging the lock onto the rotary swith in whatever gear posi it is in.

Early US failures were traced to dry solder joints and with some judicious resoldering the solonoid can be put back into service. The LED issue can't be fixed.

Of course the dealer will not do this as they are told that fault x = replacement of module y. ..in this case the whole TCS!

I'm confident I can have a go at fixing the TCS and at the same time install a rip cord to activate the release mechanism should the system fail again. After all the lock out mechanism is simply a spring loaded pawl controlled by the solonoid. Pulling the pawl back will allow the rotary knob to be rotated to P and then u can start the car then move it to D and away you go.

Marc on this forum will post a far more detailed explanation soon and I thank him for his excellent advice.

Look out guys...knob failure is coming your way. ... hopefully not when your on the beach at low tide😎

[Mattblack59bus]

Ha Ha Knob Failure! that's the best description of the issue so far [bigsmile]

Cheers
Marc

[Mattblack59bus]

Hi Eric,

I have posted my fix as a new post, hopefully it's helpful to yourself and others, I think I've also just discovered my green LEDs don't illuminate, might have to work on a fix for that too.

Cheers
Marc

[LRD414]

Link to Marc's detailed thread:

8 speed shift lock solenoid problems (https://www.aulro.com/afvb/l319-discovery-3-and-4-a/275343-8-speed-shift-lock-solenoid-problems.html)

Regards,
Scott

[rusty05]

At least he knew how to do that! Many early D3s were dragged onto tilt trucks with the gearbox still in Park.
[bigsad]

[Victim]

I think I've also just discovered my green LEDs don't illuminate, might have to work on a fix for that too

What green LEDs? I'm guessing this question means mine aren't working either!

[Mog60]

What green LEDs? I'm guessing this question means mine aren't working either!


The green LED surrounding the dial is known to fail.

155788

[INter674]

Yes led failure is very common and was the primary reason for replacement of the module under warranty...if you picked it up.

LR issued a bulletin about it some years ago. Make sure the dash lights rotary dimmer is fully up to bright as the leds dissapear on low.

The LR Engineer who designed the module has commented via a US Jag site that the problem relates to a failed chip/ic and is difficult to fix. Most Jag and LR owners out of warranty simply ignore it...once they see the cost of the new module. ..oft quoted at 2k or more to do the work!!

[Victim]

Wow, that green LED looks cool - I don't recall ever seeing it function in my vehicle!

[ATH]

I'm the same as "Victim", I never knew the thing had a green ring or any other colour ring. Maybe mine has never worked or I didn't notice it or assumed it was just another pretty thing to please those that like nonsensical crap in their cars.
The more I read about possible probs. with D4s the more I'm tending to giving up on 4WDs and just get something just for towing our small van. Maybe I should be like a bloke I knew who told me he never uses forums such as this as they are depressing.... then his Puma 110 transfer shaft crapped itself and he's never spoken to me since. Maybe he thinks I should have warned him. :(
Such is life as a Landie owner I suppose.
AlanH.

[INter674]

.......it's not just Landies....similar tales of woe exist across other vehicle specific forums too!

Guess that's what 7 year warranties and free servicing are designed to address😐

[rowesa]

Hi All,

I have just had this happen to my 8 speed D4, im in the process of writing up a fix for it (well how I fixed mine) and also how to get it started and get home with the problem when it happens (all you need is a T20 torx driver & a touch of bravery).

You can buy second hand rotary units for AU$100 on ebay including shipping from the UK, but in my case I fixed it without expense.

Cheers
Marc

If a second hand unit is installed (MY13 Disco 4) will the unit need to be configured to the car or is it plug and play. The TB says the unit needs to be configured. https://static.nhtsa.gov/odi/tsbs/2016/SB-10097267-1020.pdf I'd welcome any advice as I have a replacement unit. Many thanks Steve.

[HarryO]

The first post in this thread may help even though it’s for an 8sp - I keep a copy in my “get out of jail free” folder. Mattblack59bus did a cracker of a job incl photo’s

8 speed shift lock solenoid problems (https://www.aulro.com/afvb/l319-discovery-3-and-4-a/275343-8-speed-shift-lock-solenoid-problems.html)

[DiscoPHOR]

Hi All, <br>
<br>
I have just had this happen to my 8 speed D4, im in the process of writing up a fix for it (well how I fixed mine) and also how to get it started and get home with the problem when it happens (all you need is a T20 torx driver &amp; a touch of bravery).<br>
<br>
You can buy second hand rotary units for AU$100 on ebay including shipping from the UK, but in my case I fixed it without expense.<br>
<br>
Cheers<br>
Marc<br>
<br><br>Hi All,<br><br>I'm a Newbie here and a big Thank you to Marc for writing up the FIX "stuck gear selector on 8 speed trans" Well Done. It happened on my D4 2016 SDV6 HSE which I had since new and just getting it ready for my first big trip to Uluru in couple of months when the Rotary Gear Selector decided to stay on "D" permanently. Went to Bunnings last Saturday, I tried to park and the KNOB just won't turn to reverse<img src="https://www.aulro.com/afvb/images/smilies/BigSmile.png" border="0" alt="" title="BigSmile" smilieid="293" class="inlineimg">, so I thought OK maybe it will RESET if I switch the engine OFF .So I parked on clear area accessible to tow truck just in case then I switched the ignition OFF, there you go SHE won't start again coz it's now stuck on Drive. I disconnected the battery, pull the emergency cable to NEUTRAL still nothing worked and finally I called NRMA, patrolman organised TILT TRAY&nbsp; took my Disco4 home, lucky only 5km away.<br><br>That's when I started GOOGLE and saw AULRO forum about TCS STUCK on Drive with Marc's Fix, except I purchased the unit LR090489 for $955.00 from a Dealer since I need the car this coming weekend. So,I printed Marc's PDF file and followed his instructions, step by step then installed the new unit, started Disco4 up then it worked. Had an engine warning though but after disconnecting the battery a few times, it went away. After that I had the module configured and updated ( apparently it has to be done) at the dealership and so far she's good.<br><br>Next step now is to get the faulty Gear shift selector and use it as spare.&nbsp;<br><br><br>

[sparky_pete]

I'm still writing my instruction, if you need help now give me a call or send me a message (I've PM'ed my number) and I'll step you through my fix, although my problem did list a fault with the Gear selector shift lock solenoid, it wont fix it if you have a fault in the transmission itself.

The fix does involve pulling the TCS (Transmission Control Switch (aka the dial)) apart, so that will keep you happy. Ha Ha!

Cheers
Marc

Mine intermittently played up a couple of months ago but came good, then sure enough the wife reversed out of the driveway the other day and it died completely. Stuck in reverse but i pulled the release and pushed it back onto our nature strip.

Ive a new TCS on order but i guess my question will be, what do you need too do when installing a new TCS? Do i need to set it to N first before power on?

I don't have a Nanocomm or anything to interrogate the car so will it just plug and play?