Which arb locker fits a 1994 NAS 90 ST? - Defender Source
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  #1  
Old August 26th, 2014, 12:18 PM
DonFromWhitby
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Don Andrews
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Which arb locker fits a 1994 NAS 90 ST?

I've been searching around the Faqs, mods and forums and unfortunately, the search comes with a million hits. After an hour or searching, I'm giving up and just asking...

Arb has a few different lockers for defenders.. But which one is for a 1994 NAS 90?

A search on the Arb USA website come up with the following partnos:

RD127 10 spline 3.54 ratio

RD128 24 spline 3.54 ratio

RD138 TC 24 spline 3.54 ratio

RD20 Salisbury 24 spline 3.54 ratio

No explanation is given for which is for front vs rear, or which is used for NAS trucks...


Any help from someone who's done this?

Looking to do rear first, then front later when budget allows...
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  #2  
Old August 26th, 2014, 12:20 PM
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RD128 24 spline 3.54 ratio
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  #3  
Old August 26th, 2014, 12:21 PM
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RD128. Front and rear.

RD127, for 10 spline trucks. Just a really stupid idea....
RD138, for P38 style diffs.
RD20, Salisbury. Basically a Dana 60 used in the rear of pre 2007? 110s and 130s.
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  #4  
Old August 26th, 2014, 12:22 PM
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http://www.arbusa.com/uploads/PDF/ac...erDefender.pdf
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  #5  
Old August 26th, 2014, 12:23 PM
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Your truck has a 24 spline axle and 3.54 gear ration so you have 2 choices there. I don't know the difference between the two however so someone else may need to jump in with some help there. Both front and rear are the same btw.

Clay
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  #6  
Old August 26th, 2014, 12:24 PM
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And budget to install aftermarket halfshafts and CV joints.... IMO.
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Old August 26th, 2014, 12:31 PM
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Quote:
Originally Posted by Red90 View Post
And budget to install aftermarket halfshafts and CV joints.... IMO.
X2 especially if you only go rear and plan to run larger/heavier tires over challenging terrain. But with that said I'd rather break an axle than blow a diff.
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  #8  
Old August 26th, 2014, 12:46 PM
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And I should add.... You are better off getting an Ashcroft air locker than an ARB. They have a better design.
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  #9  
Old August 26th, 2014, 12:50 PM
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If you have to ask these questions, just buy a rear locker as well. You don't need a front. The extra cost to make these late model axles strong enough for a locker is unreasonable for the benefit.
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  #10  
Old August 26th, 2014, 01:27 PM
DonFromWhitby
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All interesting points. I had forgotten that Ashcroft made an air locker.

Maybe they'd put together a package with the locker and half shafts...

What should I be looking for in uprated CV joints? The truck is stock height, but I'm looking to add a 90mm lift and go from the 285/75/16 Goodyear MTRs (i think that works out to 32" OD?) to something bigger with some wheel spacers ( I have some rubbing now with these tires)

The MTRs work well for me, but they're very loud.. The truck sees about 3000km of driving a year and in terms of split between highway and trail, I usually drive about two hours to the trail at highway speeds, then spend a day or two in the bush at low speed.

Otherwise, I'm about 10 minutes from my favourite green lane where I can get the kids a bit bumpy and a little muddy with no risk of body damage or getting stuck. I'm debating getting more road worthy tires and if I get stuck, relying on my winch. I'm looking to do some tougher trails with some of the local 4x4 clubs where they are recommending 35" tires and. 4" lift (mind you a jeep needs more lift than a D90) for some of these trails with difficult rock passages.


Thanks!

Don
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  #11  
Old August 26th, 2014, 02:38 PM
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For the CVs, I would get the Rovertracks kit. http://lucky8llc.com/Products.aspx?ProductID=7881 Best deal out there.

90mm lift? Are you serious? Why? That is a big lift for a 90 and has a lot of downsides. In addition, doing it properly is very complicated.
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  #12  
Old August 26th, 2014, 02:49 PM
DonFromWhitby
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Quote:
Originally Posted by Red90 View Post
For the CVs, I would get the Rovertracks kit. http://lucky8llc.com/Products.aspx?ProductID=7881 Best deal out there.

90mm lift? Are you serious? Why? That is a big lift for a 90 and has a lot of downsides. In addition, doing it properly is very complicated.
Typo.. 50mm

And thanks for the link.. Looks like a good quality kit..
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  #13  
Old August 26th, 2014, 05:33 PM
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i'll have front and rear ARB's with 4:11 for sale shortly......
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no thanks whatever I tell you, you will low ball me
I would rather keep the parts in storage
good luck with your search
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  #14  
Old August 26th, 2014, 05:37 PM
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I would recommend you speak to Lucky8 or Great Basin Rovers. Explain to them what you intend to do in the near and long term. They will be able to give you advice on what to do first, etc. These are both well respected in the industry and will guide you on options to consider.

If you are going to be doing trails that need that type of vehicle prep there are other issues you should be aware of and take into consideration.

I just think it's tough to ask the general public questions like this and keep from getting even more confused.

Clay
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  #15  
Old September 14th, 2014, 10:03 AM
DonFromWhitby
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Quote:
Originally Posted by ron View Post
i'll have front and rear ARB's with 4:11 for sale shortly......
Asking price and condition?
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  #16  
Old September 14th, 2014, 11:41 AM
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If you don't get Ron's arbs, get the Ashcrofts with half shafts /cvs
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  #17  
Old September 14th, 2014, 11:56 AM
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Quote:
Originally Posted by Z.G View Post
If you don't get Ron's arbs, get the Ashcrofts with half shafts /cvs
X2 but I would go with the tibus/rover tracks cvs.
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  #18  
Old September 14th, 2014, 12:19 PM
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Quote:
Originally Posted by DonFromWhitby View Post
Asking price and condition?
That's the config I'm running with my MTR's right now...no problems whatsoever. And if you're doing all of that half shaft and CV's is the smart way to go...sell the old or keep as trail spares. Good Luck!!
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  #19  
Old September 14th, 2014, 12:40 PM
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Originally Posted by Arcadeus View Post
X2 but I would go with the tibus/rover tracks cvs.
My bad...stuck in D2 mindset where Ashcroft is the only option haha
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