Is my gearbox failing or engine issue?

[mike7]

Hi all,

reversing up my driveway that has a 7-10 degree slope so was going uphill in reverse. Car moved back as normal for about 3 feet and than stopped as if I needed more revs to keep the momentum going but as I pushed in the accelerator the engine revs didn’t increase at all. Car just sat there. I pushed the accelerator in about half way and the engine just didn’t respond with the car standing still.

Looking at the rear window I noticed a reasonable amount of whitish smoke. I tried again and the car eventually got up to the top after 3 attempts but again minimal revs and just crawled up. It didnt feel like anything was slipping between engine and gearbox but that’s an assumption.Once in forward gear the car felt better and then a couple of minutes later hard acceleration and gear changes were normal.

Got home and stopped at the steepest part of my driveway and reversed up backwards uphill and the car reversed fine. WTF is going on?

gear box oil change at 80K km’s and there were no warnings or messages on the dash, 2.7L MY2011

Anyone have a similar experience or have any input would be greatly appreciated. Better sell a kidney, this is sounding expensive

Cheers
Mike

[Discodicky]

Hi all,

reversing up my driveway that has a 7-10 degree slope so was going uphill in reverse. Car moved back as normal for about 3 feet and than stopped as if I needed more revs to keep the momentum going but as I pushed in the accelerator the engine revs didn’t increase at all. Car just sat there. I pushed the accelerator in about half way and the engine just didn’t respond with the car standing still.

Looking at the rear window I noticed a reasonable amount of whitish smoke. I tried again and the car eventually got up to the top after 3 attempts but again minimal revs and just crawled up. It didnt feel like anything was slipping between engine and gearbox but that’s an assumption.Once in forward gear the car felt better and then a couple of minutes later hard acceleration and gear changes were normal.

Got home and stopped at the steepest part of my driveway and reversed up backwards uphill and the car reversed fine. WTF is going on?

gear box oil change at 80K km’s and there were no warnings or messages on the dash, 2.7L MY2011

Anyone have a similar experience or have any input would be greatly appreciated. Better sell a kidney, this is sounding expensive



Cheers
Mike

A faulty brake light switch will cause tranny to select neutral.
Happened to me.
Suggest you replace it anyway as cost is only around $30

[Graeme]

It could be due to a faulty brake light switch.

Edit - I'm too slow!

[DiscoJeffster]

Ok. For those who say brake light switch - when I was doing some work on the car, I pressed the brake and accelerator to try and stall up the engine on the box. It didn’t work and nothing happened if I remember correctly - the car knew I was pressing the brake. Of note though, I logged into the IID and received a logged alert/fault for something along the lines of “Accelerator and Brake simultaneously activated.“

So one would say if the brake light switch is an issue (and staying on) then this fault should be logged.

[Graeme]

The brake light switch has 2 sets of contacts. My experience is that if 1 set is burnt making poor contact then mixed signals can be received,
whereupon the engine produces very little power.

[mike7]

Ok, after reading what you guys have said about brake lights I’ve had a look and the leftt brake light lens cover is cracked just above the indicator which has caused the entire brake light “chamber” to fill with water. I could only just make it out as the whole area was filled with water so no demarcation line. Never noticed the cracked lens

the brake lamp is literally under water so Ill empty it out and dry and see what happens. I’m assuming this might have something to do with my issue?

Thanks for your responses, I’ll let you know what happens.

Mike

[PerthDisco]

Ok, after reading what you guys have said about brake lights I’ve had a look and the leftt brake light lens cover is cracked just above the indicator which has caused the entire brake light “chamber” to fill with water. I could only just make it out as the whole area was filled with water so no demarcation line. Never noticed the cracked lens

the brake lamp is literally under water so Ill empty it out and dry and see what happens. I’m assuming this might have something to do with my issue?

Thanks for your responses, I’ll let you know what happens.

Mike

Make sure you refill with LR approved brake light fluid

[Discodicky]

Ok. For those who say brake light switch - when I was doing some work on the car, I pressed the brake and accelerator to try and stall up the engine on the box. It didn’t work and nothing happened if I remember correctly - the car knew I was pressing the brake. Of note though, I logged into the IID and received a logged alert/fault for something along the lines of “Accelerator and Brake simultaneously activated.“

So one would say if the brake light switch is an issue (and staying on) then this fault should be logged.


Mine never logged a fault 'cos when I put a Scanguage 11 on it several months ago and after the switch fault, my car showed that no faults at all had occurred.

[Eric SDV6SE]

Make sure you refill with LR approved brake light fluid

Only available from selected LR dealers when you have reached "Unobtainium" service level, the one above "WTFhowmuchwasthat". RRP A$120 for 100ml flask. Unicorn horn stopper is extra.

[Eric SDV6SE]

A faulty brake light switch will cause tranny to select neutral.
Happened to me.
Suggest you replace it anyway as cost is only around $30

Doesnt explain the white smoke though. Indicates unburnt fuel.

[gavinwibrow]

Hi all,

Anyone have a similar experience or have any input would be greatly appreciated. Better sell a kidney, this is sounding expensive

Cheers
Mike


How come no one has mentioned the issue with older transmissions?
I had an EH with auto and suffered the same fate. When I finally reversed out of my predicament, I found I actually could drive forward, and went straight to my mechanic around the corner. He said reverse goes first, despite being the least used gear - that's how I got a replaced auto ouch!

[Landy74]

hi Mike7
Have a read of the tread I have going at the moment in the Range Rover Sport area as some of your symptoms sound a bit like what I'm battling at the moment I would suggest cleaning all the connections from the fire wall back to the gearbox and transfer as I made a big difference to mine hope it works for you and use a good electronic contact cleaner on all the connections including the transfer CPU behind the battery

Regards
Kynan

[mike7]

Thanks Kynan,

Ill give that a go, I spoke to my LR indy service guy and he thinks it might be the brake light switch as suggested here and not the gearbox itself which is a big relief but still early days with the diagnosis. Drove the car today and no symptoms at all, wish I had an IID tool to have a look at what faults there are.

cheers
mike

[DiscoJeffster]

So. I swear I’ve seen a brake / accelerator together error but trying today I couldn’t make it happen. So I take that back BUT!!!!
There I was at the lights today. Green arrow goes, I accelerate, I move off, just get moving and the engine dies - well doesn’t die - just press the pedal and nothing. Revs dropping and I’m slowing to a crawl, then suddenly and slowly it wakes up and starts to move off. Later I try putting my foot on the brake and accelerator at the same time and I get the same effect. I think my brake light switch is also failing. I swapped it this arvo with another used one that was working ok when removed so we’ll see. Need to find the Ford part number.

[Aussie Jeepster]

So. I swear I’ve seen a brake / accelerator together error but trying today I couldn’t make it happen. So I take that back BUT!!!!
There I was at the lights today. Green arrow goes, I accelerate, I move off, just get moving and the engine dies - well doesn’t die - just press the pedal and nothing. Revs dropping and I’m slowing to a crawl, then suddenly and slowly it wakes up and starts to move off. Later I try putting my foot on the brake and accelerator at the same time and I get the same effect. I think my brake light switch is also failing. I swapped it this arvo with another used one that was working ok when removed so we’ll see. Need to find the Ford part number.

I vaguely recall reading "somewhere" that the computer goes strange when you press the accelerator pedal and brake pedal at the same time. Not sure if it was here or not, but I know I saw it "somewhere"!

[loanrangie]

SY/SZ territory I believe for the brake switch.

[Graeme]

Many years ago now but the cheapest switch price was from the local LR dealer.

[Alistair]

Hi Mike

Could I just check something that is implied but not stated anywhere (I think). Is your gearbox a manual or an automatic? I am assuming that it is a manual as you refer to an oil change rather than a transmission fluid change, but this could have just been a turn of phrase...

I had something symptomatically very similar to this a few years back, but mine was in an auto and was specifically related to that transmission.

Cheers

Alistair

[josh.huber]

So. I swear I’ve seen a brake / accelerator together error but trying today I couldn’t make it happen. So I take that back BUT!!!!
There I was at the lights today. Green arrow goes, I accelerate, I move off, just get moving and the engine dies - well doesn’t die - just press the pedal and nothing. Revs dropping and I’m slowing to a crawl, then suddenly and slowly it wakes up and starts to move off. Later I try putting my foot on the brake and accelerator at the same time and I get the same effect. I think my brake light switch is also failing. I swapped it this arvo with another used one that was working ok when removed so we’ll see. Need to find the Ford part number.

You are right mate, but to get that error up I " think" you need to hold it a certain amount of time. Also both circuits in the switch need to be working. I did the same thing the first time my switch went. Tried to replicate it. Now I have one in the glove box

[mike7]

Hi Alistair,

Its an auto and it’s the transmission oil that Ive changed, sorry for the confusion.

No symptoms in the last few days, Ive got my indie mechanic to come on the weekend and see if he can download any fault codes.

Mike

[GIL]

Hi Folks,

Timing is everything.
Here is a current thread dealing with brake switches and shows part numbers

Brake light switch issue D4 - Help (https://www.aulro.com/afvb/l319-discovery-3-and-4-a/246853-brake-light-switch-issue-d4-help.html)

Hope this helps
GIL