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NMBRPL8



Member Since: 07 Jul 2015
Location: Australia
Posts: 146

Australia 
automatic transmissions and transfer cases
if you have a 4wd an automatic transmission can you push start it?
i doubt a manual puma engined defender could be push started due to the fuel pressuring , but i ask all the same.
as a manual driver i have always found neutral a very useful gear to have when off roading, ie disengaging drive
Post #863578 26th Oct 2020 8:49am
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Bluest



Member Since: 23 Apr 2016
Location: Lancashire
Posts: 4209

United Kingdom 2007 Defender 110 Puma 2.4 XS CSW Java Black
You can’t push start an automatic. Automatics still have neutral. 2007 110 TDCi Station Wagon XS
Post #863581 26th Oct 2020 9:04am
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HardCharger



Member Since: 03 Mar 2013
Location: Manila
Posts: 736

Philippines 2011 Defender 110 Puma 2.4 SW Stornoway Grey
Pumas CAN be push started.

Automatics cannot, just pushed when in Neutral.

Though I remember from somewhere that if you can get an automatic up to about 60kph, you can try starting it then Mr. Green
Post #863742 27th Oct 2020 1:59am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17378

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
It used to be possible to tow start some autos, back in the days when they were all-hydraulic in operation, but only if a rear pump was fitted to the transmission. IIRC the Borg-Warner 35 or 65 was sometimes so fitted.

These were popular on safari motors at one time since they could be tow started provided the TC was properly filled, but you couldn't push start them manually because of the speed necessary.

I don't think any of the modern electronic autos can be push or tow started.
Post #863758 27th Oct 2020 8:33am
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discomog



Member Since: 09 May 2015
Location: Notts/Lincs Border
Posts: 2526

United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Santorini Black
Blackwolf you are definitely showing your age now. I remember working on the Borg Warner 35's as an apprentice. I don't know what was in that horrible red transmission oil but it sure cleaned your hands after a day stripping down the box. I'd love to have a drive in a car with the BW 35 box and compare it to my modern day 9 speed auto. Defender 90XS SW
Mini Countryman Cooper S
Morgan Plus 8
Post #863765 27th Oct 2020 9:41am
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NMBRPL8



Member Since: 07 Jul 2015
Location: Australia
Posts: 146

Australia 
thanks everybody.
nice to know a puma can be push started. any tricks to that? if i park on a slope and run the battery down, could i roll start it? i thought the lack of electronics would intervene
Post #863769 27th Oct 2020 9:59am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17378

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
I doubt that you could push/tow start a Puma with no electrical power whatsoever, but provided that the battery has some power, even if not enough to crank, it should work.

With no power at all there will be no way to excite the alternator so no power can be generated (so you couldn't tow start it with no battery fitted, for example). In theory you could probably tow start a 200tdi with no battery and get it running, although it might take a bit of fiddling around.
Post #863778 27th Oct 2020 10:39am
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jst



Member Since: 14 Jan 2008
Location: Taunton
Posts: 8026

 2011 Defender 110 Puma 2.4 USW Stornoway Grey
not sure why i would use neutral if moving off road Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop
Post #863870 27th Oct 2020 5:29pm
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ickle



Member Since: 22 Jul 2010
Location: South Vendee
Posts: 1782

France 2008 Defender 110 Puma 2.4 CSW Alpine White
IIRC even a 200tdi needs 12v to the fuel solenoid to start it?

Keith
Post #863885 27th Oct 2020 6:48pm
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AndrewS



Member Since: 10 Apr 2007
Location: Hereford
Posts: 3707

United Kingdom 2013 Defender 130 Puma 2.2 SW Rimini Red
jst wrote:
not sure why i would use neutral if moving off road


Or on road Shocked 130's have feeling's as well you know Smile
Post #863892 27th Oct 2020 7:07pm
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PeeWee



Member Since: 13 Apr 2017
Location: Somersetty
Posts: 17

England 2010 Defender 110 Puma 2.4 XS CSW Rimini Red
"Push starting" a Puma:
10/11 years ago I did an LR Experience in a 2.4 Puma and the instructor was quite clear that it could be bumpstarted on a steep hill. I say "bumpstarted" - brakes on, in gear, ignition on, take the brakes off and it would roll and start without the starter motor. I sem to recall that this was in low ratio as well.
Post #962352 20th Aug 2022 7:20pm
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County V8



Member Since: 07 Jun 2021
Location: UK
Posts: 147

United Kingdom 
Wasn't that just to get it back down the hill if it stalled???
Post #962359 20th Aug 2022 9:35pm
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PeeWee



Member Since: 13 Apr 2017
Location: Somersetty
Posts: 17

England 2010 Defender 110 Puma 2.4 XS CSW Rimini Red
Yes, it was But letting it start itself, without using the startermotor, isn't that different to bumpstarting ?
Post #962366 21st Aug 2022 6:11am
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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
Posts: 11324

United Kingdom 
No, that is bump starting. It's also a useful technique in reverse on a failed, stalled, hill climb to get back down again. Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia
Post #962367 21st Aug 2022 6:29am
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Dinnu



Member Since: 24 Dec 2019
Location: Lija
Posts: 3414

Malta 2012 Defender 90 Puma 2.2 CSW Santorini Black
ickle wrote:
IIRC even a 200tdi needs 12v to the fuel solenoid to start it?

Keith


You are correct, from 12J engine onwards (change to timing belt driven injection pumps), they had an electrical fuel shut off valve on the injection pump. The valve is normally closed, so the engine will not start unless a 12V is supplied to the solenoid.

The 10J as fitted to series and some early coil sprung had a manual shut off. Those can be bump started without a battery. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black
Post #962368 21st Aug 2022 8:07am
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