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View Full Version : Benefits of Centre ATB when already have diff trutracs?



gavinwibrow
13th March 2019, 07:21 PM
Hi folks. In my minuscule efforts to try and keep the economy going -what if any marginal benefits apply from fitting a centre ATB to a LT230 (with CDL) when trutracs are already fitted to front and rear diffs?
Interested in comments from the many gurus on here!

Bohica
13th March 2019, 09:49 PM
My ideal set up would be ATB diffs front rear and centre.

John_D4
13th March 2019, 10:20 PM
My ideal set up would be ATB diffs front rear and centre.

Sorry, but what’s an ATB?

gavinwibrow
13th March 2019, 10:24 PM
My ideal set up would be ATB diffs front rear and centre.

Which is very close to what I'm considering, given the trutracs are a very similar beast.

Eevo
13th March 2019, 11:14 PM
Sorry, but what’s an ATB?


Review: Ashcroft LT230 ATB centre diff (https://www.aulro.com/afvb/technical-chatter/207166-review-ashcroft-lt230-atb-centre-diff.html)

rick130
14th March 2019, 05:34 AM
It'd be interesting to drive.
I'd really like to feel how it affects the under/oversteer balance using all three?
One thing having an ATB in the t/case did is reduce the backlash there substantially.
Probably not noticeable with an auto, but very much noticeable on a manual.

AK83
14th March 2019, 06:23 PM
....
I'd really like to feel how it affects the under/oversteer balance using all three?
....

Same here .. mainly on the faster(ie. smooth) gravel roads that dominate our country.
Gotta say tho, as is, on fast gravel, D1 handles just as I expected it too(like my old RRC), very predictable and quite neutral handling.

my only issue ATM is some rear bump steer .. thinking either trailing arm bushes(to chassis) or maybe balljoint not quite in top nik .. kind of bump steer.

INter674
15th March 2019, 06:27 AM
Even with perfect bushes the solid axle front will always have some panhard induced steering affect especially when the suspension is raised above std. Std suspension has minimal up lift relatively..perhaps done deliberately by LR to reduce steering impacts/inputs.

Ever driven a raised yota or patrol? ...they wander all over the place😐 esp the rear whereas the rear on a disco is solid courtesy of the watts linkage.

twr7cx
17th March 2019, 07:27 AM
I've got the triple combo. Originally only had front and rear and then had the centre done on a whim. I really can't say I noticed anything particular after it though.

rick130
17th March 2019, 08:00 AM
Same here .. mainly on the faster(ie. smooth) gravel roads that dominate our country.
Gotta say tho, as is, on fast gravel, D1 handles just as I expected it too(like my old RRC), very predictable and quite neutral handling.

my only issue ATM is some rear bump steer .. thinking either trailing arm bushes(to chassis) or maybe balljoint not quite in top nik .. kind of bump steer.Hey Arthur,

I found with a little play in the lower rear trailing arm chassis bush the rear roll steer was pretty horrific.
Check the A frame to chassis bushes too, the bolt and crush tube wear leading to bump steer and a clunk.

I just hate using industrial bolts in double sheer clevises, threads aren't designed to bear loads!!!!
I used to go rough through the race cars I used to look after and replace any SAE hardware with AN/MS/NAS spec bolts where you can specify the grip (unthreaded shank) length.
They go up in 1/6" increments just so they can be used in shear.
Or if I had to use socket head cap screws I'd buy too long and trim the threads to suit, often having to use washers as packers under the nut to get the grip length I needed.

The wear on those big 19mm bolts for the A frame was scary!
I just used genuine bolts as they are a known quality with the Deefer and made sure every bolt was correctly tensioned and crossed my fingers. [emoji23]

dero
17th March 2019, 08:37 PM
I have a Detroit locker in the rear & ATB front & centre , I do a lot of fast gravel driving .
Handling is very good, even if going a little too fast for some corners, I just keep the power on & handling is very predictable .
It is a 130 , which may help a little to .

John_D4
17th March 2019, 10:16 PM
I have a Detroit locker in the rear & ATB front & centre , I do a lot of fast gravel driving .
Handling is very good, even if going a little too fast for some corners, I just keep the power on & handling is very predictable .
It is a 130 , which may help a little to .

I’ve considered getting a Detroit for the rear of my D2. Which one have you got? Straight Detroit or a Truetrac?

rick130
18th March 2019, 12:54 AM
I have a Detroit locker in the rear & ATB front & centre , I do a lot of fast gravel driving .
Handling is very good, even if going a little too fast for some corners, I just keep the power on & handling is very predictable .
It is a 130 , which may help a little to .An extra 27" of wheelbase definitely slows the response down a little! [emoji4]

dero
18th March 2019, 09:41 PM
Std Detroit locker in the rear & trutrac in the front.
Love the locker , they are bullet proof.