Sand Bog “Crawl Control”

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Originally Posted by geoffmc

Guys,

my previous vehicle was a 150 Prado Kakadu, complete with CRAWL. I used it twice on the sand to extracate myself from being seriously bogged. I had a rear factory difflock and on both ocations, CRAWL advised to unlock the rear locker, as it couldnt divert drive to the wheels as-needed. CRAWL works differently to the video further up in this post, it actively proportions drive at a much slower speed to wheel as necessary, using the brakes to slow and maintain the wheel speed at an amazingly slow rate, which isnt possible manually. Thats the other bit of kit that i miss from the Prado.

cheers
Geoff

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I don’t understand why you needed it? I didn’t think a Toyota could get bogged? That’s what Tojo drivers keep telling me [emoji2369]

Just re reading the D4 TC specs it appears the upgraded sand launch mode provides a soft start which I guess when combined with the extra lift that should activate if bogged will greatly assist with extraction.

Crawl mode sounds very interesting tho..have to look out for that one..and good to see Toyota doing some innovation!

Steane and Dave at Loaded4x4 love Landies, Steane particularly (he drives a Deefer) and they both reckon that crawl mode in the 200 Series is the best TC mode they've used

Okay..got to try sand mode today..but on wet grass.

Parked the 1300kg float up hill on wet grass...after 50mm rain..so yes..very wet and slippery.

Went to take off in high range D..no go..just wheelspin as the engine revved up.

So selected low range plus sand mode. Pressed acc pedal..hum..not much happening yet..pressed some more and slowly the car inched forward slowely gathering momentum.

So sand launch mode seems to work quite well on slippery grass. It dulls the throttle response quite a lot...not quite crawl mode but enables much better loud pedal control.

Sand launch mode? You are talking about:
Low range rather than high,
Sand mode selected
DSC off

I guess I don’t get what you mean when you say “launch” ....

I guess in the old days we just used the hand throttle. Then software started giving cars a bit of a helping hand, which is a good thing. The Puma Defenders had the whole Traction Control and anti-stall thing happening and works a treat in sand (see below). Now with sand mode in Toyotas and JLR Terrain Response settings they make things a lot easier for the driver nowadays. I've been playing around with my D3 of late and even though it's a 2006 with early software compared to the D4's and D5's, it is very capable on 18's.

YouTube

Found this explanation from LR..note the brake application..

"New Discovery 4 takes this technology a further step forward and includes new Sand Launch Control and enhanced traction during
Rock Crawl Pre-charge which is a function that applies a small amount of brake pressure to each brake calliper during very low speed driving.

The new Sand Launch Control system helps prevent the wheels
spinning when moving off from a standstill and the vehicle ‘digging in’. Once the vehicle reaches the appropriate speed the slip threshold is returned to its normal state."

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Originally Posted by DiscoJeffster

I don’t understand why you needed it? I didn’t think a Toyota could get bogged? That’s what Tojo drivers keep telling me [emoji2369]

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hahaha, yes, i know several Toyota owners that believe that mantra. I'm not a brand loyalist and have owned Pajeros, Pathfinders, Patrol, Suzuki, Toyota's, however the D4 is the closest to perfection ive owned.

cheers
Geoff

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Originally Posted by geoffmc

hahaha, yes, i know several Toyota owners that believe that mantra. I'm not a brand loyalist and have owned Pajeros, Pathfinders, Patrol, Suzuki, Toyota's, however the D4 is the closest to perfection ive owned.

cheers
Geoff

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In 4WD Territory I’ve owned Pajero (‘99 NL, last of the ladder frame), Freelander 2 (can’t count that) and D4. I’ve never sold my soul to Toyota.

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Originally Posted by DiscoJeffster

In 4WD Territory I’ve owned Pajero (‘99 NL, last of the ladder frame), Freelander 2 (can’t count that) and D4. I’ve never sold my soul to Toyota.

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Mate,

ive owned 2 x R50 Pathfinders, an NH, NL and NT Pajero (the NT was heavily modded and was the most reliable vehicle ever owned), LWB Suzuki Sierra, 150 Petrol Prado Kakadu (i wanted to see what all the fuss was about) and a GU CRD Patrol (lots of off road mods), a Subary MY80 Wagon (lift kit, RX Turbo motor and rear detroit locker and it was a weapon) and now the Disco.

cheers
Geoff