Thread: Lucky 8's Project P38

Originally Posted by mtb_gary

Are you planning on putting the ABT in the front diff in addition to the rear?

Gary

I dont know yet. Im thinking of putting a Locker in the Rear and then moving the ATB To the front.

Originally Posted by FiveSPDDisco

I dont know yet. Im thinking of putting a Locker in the Rear and then moving the ATB To the front.

ATB's are on my wish list for front & rear. I like the idea of not havng to stop to engage a diff lock, or lose power when the traction control kicks in. esp around my area which is primarily soft sand dunes.

Gary

Who said you need to stop to engage a locker!

Originally Posted by Keithy P38

Who said you need to stop to engage a locker!

Good point Keith. Yeh no need to stop to put a locker on. I've enabled mine heaps of time without stopping. Only thing you shouldn't do is enable it when one wheel is going a lot faster than the other side I'd say.... Then you probably aren't moving anyway if that is happening so there's no problem backing the throttle off to enable the locker.

So the ABT would be better for steering in the front over a locker but it doesn't lock as well when a wheel is lifted huh? So its a good sacrifice to still have decent steering in the front. Might look into these over a locker if I go down locking the front... to compliment the rear locker.

In something with TC the ABT is seemless you generally won't need to think about engaging it. If you stop then you probably need more than the diff for the sake of the axles

Or dont unlock a locker whilst its under torque, it goes TING!

As I understand the angle of the helical gears are quite steep so it'll 'ramp up'quite strongly in response to the tc. Im guessing 85-90 percent locked?

Originally Posted by benji

Or dont unlock a locker whilst its under torque, it goes TING!

As I understand the angle of the helical gears are quite steep so it'll 'ramp up'quite strongly in response to the tc. Im guessing 85-90 percent locked?

Thanks. I'll be keeping that in mind then Benji. Is this with an Ashcroft or another brand like ARB? I'm listening to your advice, just surprised it would disengage under torque. Maybe other brands have stronger springs to disengage them?

I've found my ashcroft locker seems to stay locked with the air turned off even under the slightest load so surprised to hear it ting when disabling under load. I haven't tried when under high load and likely won't either now.

The first test run I did was on grass. Turn it on then did a tight turn to see it churned the grass up on the inside wheel which proved it was active. Turned the air off and it still churned the inside tyre until I put the car in neutral or went into reverse to take all load off it. Even driving in a straight line seemed to keep it locked. Maybe turning the other direction would have disengaged it though. Well mine did anyway.

Not disengaging even under the small load is actually one thing that concerns me and always do some tight turns to make sure it's turned off before hitting the bitumen again. Just sitting there with the brakes on and in drive seems to keep it locked so can't see it disengaging when under much load.

But you guys have got me tempted to get one of these ATB for the front now though because I never fancied a locker in the front unless driving in a straight line. Just not sure if that thousand odd bucks delivered to Oz will be too noticeable with a rear locker and traction control on the front already. Happy to be convinced though

Are these things only 295 pounds plus the p38 spacer and postage? So only 434 pounds delivered to Sydney. Hmm that's getting more tempting now.

So they don't encourage understeer on the road at all?

Are they as strong as the front 4 pin diffs?

Any comparison to the other brand ATB diffs ashcroft sell that are more expensive?