auto lockers vs selectable cross axle
Submitted: Monday, Jan 14, 2008 at 20:08
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baldman
Hi all,
What are the pro's and cons of using each of these systems and would it be advisable or practicle to fit auto lockers to the rear axle and selectable cross axle lockers to the front.
cheers
baldman
Reply By: Robin Miller - Monday, Jan 14, 2008 at 21:12
Monday, Jan 14, 2008 at 21:12
For ultimate performance across all conditions I would rate the selectable cross axle type is the best Baldman.
However it doesn't perform best under all circumstances and under all driveline configurations.
Assuming the once standard part time 4wd system with lockable hubs.
The auto locker can be very good in non-slippery conditions but after using both in Patrols I have no doubts that ARB type is most practical.
The ability to turn it off on slick surfaces has saved me more than once and some of my most memorable 4wd moments have been spent understeering off a track due to the inability to de-select the automatic type.
While I don't know what car you refer to , generally speaking a rear auto and a front selectable is an acceptable combination
Robin Miller
AnswerID:
281636
Follow Up By: baldman - Monday, Jan 14, 2008 at 21:26
Monday, Jan 14, 2008 at 21:26
Thanks for the advice Robin.
Due to $$$ I will probably be purchasing a rig with manual hubs. The type or model is still undecided.
My assumption was that whilst attempting the more difficult parts of the track the auto locker would engage and assist when needed and a front ARB type would also be used when necessary.
By having an ARB type on the front I was hoping that this would not impede my steering ability on smooth or slick tracks.
Plus the money saved by going this way would go towards a winch.
thanks
Baldman
FollowupID:
545951
Reply By: splits - Monday, Jan 14, 2008 at 22:41
Monday, Jan 14, 2008 at 22:41
Baldman
I have an auto locker in the front of my Hilux and the stock limited slip in the rear and I could not be happier with the combination. People tell me Toyota LSDs are crap but I am still waiting for the thing to wear out and if it ever does I will fix it because it works very
well and I can't see the need for anything else. The locker does not make the steering heavier but it does self centre a little faster. It took me all of about 5 ks in the bush to get used to it and it felt normal from then on. In 2WD on the black top, but with the hubs still locked in, it still fells fine. You can hear a light knocking sound as it unlocks on tighter corners but that is all.
The term "unlocking" on corners is not quite correct because at least one wheel is always driving. It can't return to being an open diff.
The only thing that worries me with air lockers, apart from the cost and the electrical/mechanical complexity of them, is when you engage them you are forcing both wheels to turn at the same speed all the time and no two wheels ever turn at the same speed, not even in a straight line on the freeway. This means one wheel is always skiding and this would have to place an enormous strain on the axle, particularly at the front with the CV joints. You also have the problem of heavier steering and a reluctance to turn sharp corners.
I would be very reluctant to turn it on and would probably leave it too late in many situations. When it was on I would be in a hell of a hurry to get it off again. I have found my auto locker is like a "set and forget" thing. It is there at the precise moment I need it and it is rolling along and not worrying me when I don't.
Brian
AnswerID:
281660
Reply By: Twinkles - Tuesday, Jan 15, 2008 at 08:27
Tuesday, Jan 15, 2008 at 08:27
I also have a Hilux with an auto Lokka in the front and standard in the rear. I fitted manual hubs as
well. I fitted the hubs so that I could wind the
suspension up and not be running the CV's at highway speeds. I fitted the auto lokka because of price. When driving on dirt roads/tracks that have good traction when in 4wd, then the steering pull back to centre is strong, but on difficult tracks it is not noticable. I took the car up the Burgoyne Gap Track last weekend and it performed fantastic. Very loose large rocks cover the track and roll away under you and further up, where I had the the most difficulty last time because I kept lifting a front wheel and losing forward motion(IFS sucks), I plodded over it. I have also put a softer after market
suspension which helps keep all wheels on the ground. If i was going to fit a locker to the back, I would probably fit an ARB or TJM air locker.
Take a look here:
http://www.pps.net.au/4wdencounter/articles/difflocks.html
AnswerID:
281701