Stall recovery in Nissan Patrol

Submitted: Thursday, Jul 19, 2007 at 21:41
ThreadID: 47895 Views:3632 Replies:8 FollowUps:10
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Just finished 4WD Course run under guidelines of Australian National 4WD Council. A great experience that I can highly recommend.

During the course, we were taught how to perform a stall recovery. I'm sure you seasoned off roaders know the drill. Funny thing is though there were 3 Patrols there on the day and none of them would hold the hill in gear (low first) with the handbrake off...

They were all 3.0litre models of similar vintages. The Landcruiser belonging to the instructor sat on the hill for ages, engine off, in gear, no brake, no hand brake. Not the Patrols which rolled back (slowly and with a clunk on each movement).

Is this a gearing thing or a compression thing?

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Reply By: Jimbo (WA) - Thursday, Jul 19, 2007 at 21:46

Thursday, Jul 19, 2007 at 21:46
Mike - it's a compression thing. The Patrols will still do a stall recovery (as will other manual vehicles with less compression) it's just that you will experience the beast moving "in clunks" if the hill angle is steep enough.
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Reply By: Member - Brian (Gold Coast) - Thursday, Jul 19, 2007 at 22:14

Thursday, Jul 19, 2007 at 22:14
As Jimbo says, it's a compression thing. The Nissan's are apparently renowned for this, although I hadn't heard of the 3.0l being any worse than others. My 4.2 isn't too bad, it will sit ok on a reasonable grade.

Pleased that you enjoyed the course, might I make a suggestion that you regularly practice the stall recovery, the day that you might need it, you probably won't have time to read the notes! And believe me, if you get it wrong, it gets very ugly, very quickly!

Cheers

Brian
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Reply By: Member - Phil G (SA) - Thursday, Jul 19, 2007 at 23:28

Thursday, Jul 19, 2007 at 23:28
There's also a fair bit of difference in ratios. Usually 44:1 on the Toyota, and about 35:1 on the Patrol for low 1st. I'm guessing that this would be relevant.
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Follow Up By: Member - Glenn D (NSW) - Friday, Jul 20, 2007 at 21:29

Friday, Jul 20, 2007 at 21:29
Hows it going Phil,

Only got a blow out on the way home .

Other than that the mighty 3.0 Patrol has been destroying the km's ( LOL )

Maybe you miss having something to fix

Glenn.
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Follow Up By: Member - Phil G (SA) - Saturday, Jul 21, 2007 at 07:03

Saturday, Jul 21, 2007 at 07:03
Gday Glenn,
You weren't alone - sounds like a couple of others had the "blowout on the way home" too. Best part about Warraweena was that with 53 vehicles, there was always a bonnet up :-))))

I'm hoping I've got nothing to fix for the next 6 weeks. We're leaving for the Pilbara this morning - just having a final look on Exploroz. 3 vehicles - all 78/79series TD, so if anyone needs a spare part...............we can all point the finger and say "I thought you were bringing it" :-))

All the best!
Phil
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Reply By: fj1200 - Friday, Jul 20, 2007 at 00:31

Friday, Jul 20, 2007 at 00:31
What is a stall recovery.
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Follow Up By: Richard Kovac - Friday, Jul 20, 2007 at 00:33

Friday, Jul 20, 2007 at 00:33
You turn the key to re-start.. lol
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Follow Up By: fj1200 - Friday, Jul 20, 2007 at 00:39

Friday, Jul 20, 2007 at 00:39
Thanks for that info, wont have to pay for a course now. :-)
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Follow Up By: Ron173 - Friday, Jul 20, 2007 at 10:33

Friday, Jul 20, 2007 at 10:33
There is a technique called “stall recovery” that everyone should know. This refers to a situation where you have been unable to get all the way up the hill due to traction problems.

You allow the vehicle to stall on the hill and then, with your foot on the brake, engage reverse gear low-range. Then ease your foot off the brake so that the gearbox and drive train are holding the weight of the vehicle. Once that is done, you tuck your feet under the seat, and turn the key. The vehicle will reverse smoothly back down. This technique gives you complete control, which is why you should never attempt to reverse back down a track on the brakes or with your foot on the clutch.

Ron
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Follow Up By: Ingtar - Friday, Jul 20, 2007 at 11:13

Friday, Jul 20, 2007 at 11:13
It's a pretty straightforward process once you've done it a few times. The biggest problem people have with it is putting their foot on the clutch before the brake. Then nothing stops you rolling!
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Follow Up By: Robin Miller - Friday, Jul 20, 2007 at 11:33

Friday, Jul 20, 2007 at 11:33
Fun Stuff - What they don't tell you is that , when its a serious hill , you turn the key and the engine starts and shoots you backwards , sometimes at a speed which is to great to recover from , espically if track behind you is not straight.

Robin Miller
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Follow Up By: Mike Harding - Friday, Jul 20, 2007 at 12:02

Friday, Jul 20, 2007 at 12:02
Quite correct Robin.

It is important to remember that a reverse hill start is no guarantee of getting off a steep hill safely - it's simply the least dangerous way to do it this side of progressively winching yourself down.

_Really_ steep hills, such as we have in the High Country, are about the only things which actually scare me when 4WDing - get into trouble on some of those and the only way out may be in an ambulance helicopter.

If in doubt; low range one and very, very slow. If in real doubt... find another way.

Mike Harding
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Follow Up By: madfisher - Friday, Jul 20, 2007 at 21:50

Friday, Jul 20, 2007 at 21:50
Diesels are better at this than petrols. I think fuel injected petrols get a little squit of fuel when they start as I never had this trouble in my carby 4bys. Wifes Paj is a shocker for shooting backwards as the engine fires. Have yet to try the Jack in this situation. I am not impressed by its retardation.
Cheers Pete
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Follow Up By: Robin Miller - Saturday, Jul 21, 2007 at 07:42

Saturday, Jul 21, 2007 at 07:42
Agree with that Madfisher

My petrol on starting revs to around 1200 then ECU registers this and takes action to put it back to idle.

Only takes a second or two but the damage is done , and even though its 4.8lt engine has more braking than the small Nissan 3lt diesel , its to late.

Only carefully keeping some handbrake on really helps , as even the normal brakes change there characteristics in the first 2 seconds as the engine re-builds the vaccum.

Will be on espically slippery tracks to-day but I'll have the chains handy.

Robin Miller
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Reply By: Member - Davoe (Nullagine) - Friday, Jul 20, 2007 at 02:18

Friday, Jul 20, 2007 at 02:18
both - a cruiser has far more compression than a wizz bang 3.0l
also the patrol has no low range to speak of in comparrison 2.0-1 vs 2.5-1 reduction
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Reply By: Voxson - Friday, Jul 20, 2007 at 22:16

Friday, Jul 20, 2007 at 22:16
Ok.. till you have a 100series auto.. or similar
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Reply By: Member - 'Lucy' - Saturday, Jul 21, 2007 at 01:53

Saturday, Jul 21, 2007 at 01:53
It's a Nissin thing
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Reply By: Member - Michael O (NSW) - Tuesday, Jul 24, 2007 at 11:26

Tuesday, Jul 24, 2007 at 11:26
Well all those great replies and only a few token Nissan bashes. Thanks!!!

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