Thread: Puma ABS scared the ........ outof me!

Should be switchable

All the opinions here still don't match the 99.9% of times where ABS offroad works better than not having it...

If your system is playing up, get it sorted... None of you can drive better than a computer!

There has never been an occasion to date where ABS has failed or performed in such a manner for me to desire it's disconnection.

And as noted, no ABS, no Traction Control system... An even worse situation!

Originally Posted by inken_dave

..........This all works fine until I'm in a position where the Defer won't move forward. Because of the steepness, on both occasions I have disengaged the clutch at the same time applying the brake. .............

If the hill is that steep & you stop moving forward, the last thing you should be doing is putting your foot on the clutch.
Sound like you need to learn how to do a stall recovery - safest way to get back down a hill whether you lose traction or run out of puff.

Originally Posted by Larry

If the hill is that steep & you stop moving forward, the last thing you should be doing is putting your foot on the clutch.

Sound like you need to learn how to do a stall recovery - safest way to get back down a hill whether you lose traction or run out of puff.

Agree, just like I said before to use stall start process, I did it on a couple of occasions going up the hill and worked well.

I'm wiring in a switch to turn the abs computer off tomorrow. As far as I'm concerned it's outright dangerous - period.
You cannot slow down on some surfaces, and you can't do a stall recovery in an auto. I've had exactly that happen in reverse too.

On heavily corrugated gravel roads it won't slow down either.

It's great on firm surfaces, and quite remarkable in the wet - but we nearly lost it coming down a step loose track towards a switchback......
In what situations have you found it helpful offroad?

Originally Posted by inken_dave

Imagine climbing up a slope until you loose traction altogether, you continue to rev to try and inprove the ability of the TC, but when you depress the clutch, and apply the brake, instead of the wheels locking, the ABS unit jumps in and starts the anti locking process. The only problem is, that you are now heading backwards trying to stop, but because of the ABS acting while travelling backwards, the truck wont stop!!!!!!!!!!
?

I have TC in my Puma, and never encountered the situation you are describing, so either you're doing it wrong or there is an issue with your TC/ABS?

Never, ever use the clutch when going up or down steep inclines. In fact, using the clutch offroad is a big no-no, that's the first thing you are taught at LR experience.

You select the correct gear before you hit the obstacle/incline. If you cannot clear it, stall the vehicle and then do a controlled reverse.

Originally Posted by Larry

If the hill is that steep & you stop moving forward, the last thing you should be doing is putting your foot on the clutch.
Sound like you need to learn how to do a stall recovery - safest way to get back down a hill whether you lose traction or run out of puff.

I understand what you are saying, and I understand the stall recovery. If you use a stall recovery all the time, this just doesn't always fit. Often you have a chance of a second line, in which you do depress the clutch and stomp on the brake(So your engine doesn't stall!!!!!), then you back down slowly, to firmer ground. So I appreciate your comments, but not scenarios are the same!!!! I'm not talking stupid inclines, but inclines where it is possible to get going again using the right line!

What has happened, is there has been no transition time from bringing the truck to a standstill to the ABS activating! This problem is not starting when I want to reverse back down, this problem is when I’m wanting to stop on the hill, without stalling the engine!!!

Yes, in hindsight, you could let the Defer idle, it wont stall in 1st low, and then switch it off. This would be a safe option, but with anything without ABS, this is unconventional!!!!!!

They key, I have found, is to reduce you wheel speed before deciding to halt the truck.

On the tec side, if disabling the ABS is possible, then a simple relay logic circuit may work from the low range sensor, so when pushing the lever forward, the ABS comes off!

Originally Posted by inken_dave

What has happened, is there has been no transition time from bringing the truck to a standstill to the ABS activating!

Hmm, sounds like there's an issue with your ABS - wheel sensors dirty perhaps?