Home > Technical (L322) > Inadvertently selected reverse going downhill - awful noise! |
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Rob99 Member Since: 03 May 2016 Location: Gatwick Posts: 1395 |
As it says.........was travelling down a short hill and to avoid engine braking I usually just drop it into neutral until i get to the bottom but today went too far and selected reverse
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29th Apr 2017 4:06pm |
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GGDR Member Since: 26 Nov 2016 Location: London Posts: 3542 |
My dad used to slip his auto into neutral for a coast down a hill. It eventually the box. That was in the 70's. Maybe it's ok these days?
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29th Apr 2017 5:47pm |
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stan Site Moderator Member Since: 13 Jul 2010 Location: a moderate moderated moderator moderating moderately in moderation Posts: 35286 |
just thinking about that scenario the other week Rob and wondered if it was possible to put it into reverse whilst going forward and you have proved that it is ..
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29th Apr 2017 7:35pm |
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Rob99 Member Since: 03 May 2016 Location: Gatwick Posts: 1395 |
It's only a 200yd section at my kids school. I only do it there as when it gets to the bottom it seems to take a second or two for it to pick up if i leave it in drive. I'm not convinced that letting it engine brake with my foot off the gas is the best thing to do downhill either.
My guess is that, as the selector is only a switch and not a physical link, the gearbox control system wont select reverse if the forward speed is too high. I'm sure some clever auotbox person (like RRPhil) would be able to confirm that. Went on a 100 mile trip this afternoon and everything seemed absolutely normal. 2021 D350 Fifty Edition - Carpathian Grey 2017 4.4 SDV8 Autobiography (2021-2024) - Santorini Black 2012 4.4 TDV8 Westminster (2016-2021) - Santorini Black |
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29th Apr 2017 8:21pm |
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GGDR Member Since: 26 Nov 2016 Location: London Posts: 3542 |
There def must be a logic controller. Sometimes I kill the engine forgetting it's in D and some brain pops her into P automagically. So hoping you're alright. Cheers, Greg
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29th Apr 2017 8:35pm |
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Rambles Member Since: 16 Apr 2011 Location: UK Posts: 800 |
Putting the engine into neutral to coast seems like a bad idea to me.
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1st May 2017 7:17am |
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syl Member Since: 24 Jan 2017 Location: Somerset Posts: 30 |
It's pretty similar to the jaguar setup I'd have thought. Here's an interesting thread:
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1st May 2017 8:08am |
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stan Site Moderator Member Since: 13 Jul 2010 Location: a moderate moderated moderator moderating moderately in moderation Posts: 35286 |
i dont think i would ever risk putting mine into reverse at 60mph ... - .- -.
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1st May 2017 8:12am |
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Freddie The Fish Member Since: 13 Apr 2017 Location: Bedfordshire Posts: 115 |
Having just come from an Audi with a similar knob for the computer I'm worried I'm going to select reverse while zooming out the sat Nav, have nearly done it a couple of times. |
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1st May 2017 9:15am |
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Rob99 Member Since: 03 May 2016 Location: Gatwick Posts: 1395 |
It's not coasting, it's a short steep hill. Yes, it probably isn't allowed in the driving test, but as for not in proper control, you control a vehicle down a steep incline with the steering and brakes not the accelerator. 2021 D350 Fifty Edition - Carpathian Grey 2017 4.4 SDV8 Autobiography (2021-2024) - Santorini Black 2012 4.4 TDV8 Westminster (2016-2021) - Santorini Black |
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1st May 2017 2:02pm |
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berkshirelad Member Since: 06 Apr 2016 Location: Newbury Posts: 265 |
It is not a good idea to coast in neutral with an auto box.
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2nd May 2017 9:51am |
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kingpleb Member Since: 07 Jun 2011 Location: Maybe here. Maybe there, I get everywhere! Posts: 8455 |
As above, use HDC if you must but if its moving stick it in Drive or Reverse depending on the direction of travel. We know about rebuilding the 6&5 Speed boxes on here but the 8speed ones..... that could be very very costly! FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
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3rd May 2017 9:48am |
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n1cktdv8 Member Since: 19 Aug 2013 Location: Cheshire Posts: 1754 |
I think you've been VERY lucky. I "assumed" that the box selector wouldn't allow this change of gear (and potential direction) above a certain speed....if it can
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3rd May 2017 9:55am |
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DeRanged Rover Member Since: 16 Feb 2012 Location: London Posts: 379 |
I would hope to think you are ok.
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3rd May 2017 10:16am |
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