Best LT230 variant for an RRC

[Mercguy]

I'm seriously contemplating an LT230 swap for the BW in my 91 RRC.

But I need to know what the best starting point is, in terms of unit variant, gear ratios etc.

The vehicle will be getting a body lift and flares to accommodate the 235/85R16 KM2's very soon - shortly afterwards the LT swap will be on the cards, so I need to start looking for the right bits n pieces to complete the swap.

I have gleaned quite a bit of information about the unit itself, but I'm not sure if the V or Q types are any better than a T ?

Regardless of the situation, I'll be putting in an ATB centre diff down the track and likely rebuilding it before it goes in the car.

Question is, do I need anything else to mate it up to the 4hp22 apart from that different length spud shaft?

I was thinking that an electronic diff lock would be a nicer thing to have than the lever, but not sure how many D2 LT230's there are out there (or if they will fit)

Also, front propshaft.... double cardan modded or standard from a D1 or D2 required?
lastly do I need to use a different crossmember for the transfer case to the BW in the RRC or is it simply a different rear mount bush? I'm hoping the parking brake will not require any alterations to the rear propshaft, but I'm also interested in a disc type brake for a reduction in mass...

It's got to the point where information overload has addled my brain and I cannot remember the exact conversion requirements beyond the basic bits.

I guess I should ask how many members have successfully completed this conversion, and if they encountered any serious headaches along the way...

And if perchance someone has an appropriate LT230 & sundry bits they wish to part with, please let me know.

Thanks in advance :D

[DoubleChevron]

I'm seriously contemplating an LT230 swap for the BW in my 91 RRC.

Thanks in advance :D


Oh .... mines a '91 build .... I'm hijacking this thread when you work out what needs to be done :p Are you putting a proper gearbox in or sticking with the slugomatic :wasntme:

I'd go manual center difflock everytime. Nothing like stuff being manual for reliability :)

seeya,
Shane L.

[DoubleChevron]

Well it looks like I'm getting around to this one first.

https://www.aulro.com/afvb/

https://www.aulro.com/afvb/

Well I manage to source and LT230 locally .... Yes I'm sure everyone noticed right away the problem I was to dopey to notice until today.

Anyway, I've been trying to read up on this conversion, all I can find is I "may" need a new output shaft in the slugomatic gearbox .... and "may" need a disco front driveshaft. We'll see I guess. The LT230 above is apparently from a slugomatic V8 disco.

https://www.aulro.com/afvb/

https://www.aulro.com/afvb/

https://www.aulro.com/afvb/

The borg warner transfer case look remarkably clean externally. mouse **** and all :)

I've also read about "drilling out the center" of the tranny tunnel ... whatever that means .... Well, any that was quite obvious if you remove the console.

[DoubleChevron]

https://www.aulro.com/afvb/

https://www.aulro.com/afvb/

https://www.aulro.com/afvb/

https://www.aulro.com/afvb/


Other than the fact I was to stupid to notice the selector and diff lock mechanism isn't there ..... What other checks do I need to do on the LT230 before fitting ? It appears the input shaft spline is good. Do I need to check the output shaft spline ?

The guy I bought it from also has all the bits there to do a 5spd conversion ..... Damn it all, I just don't have the $$$ at the moment :(

seeya,
Shane L.

[Mercguy]

Sorry mate,

Haven't been online much recently works been hectic and I had another car with more 'pressing' issues to attend to..

AFAIK, D2 with CDL is the one you need, but you got the one without.

Not to worry, if you don't need the centre diff locked. You can shove an ATB centre in there down the track which is as good as a BW vc anyway.

Main issue as far as I understand it with the LT230 is not engaging the cdntre lock when on the loose stuff. If you have good traction it's not a problem, but if it doesn't get locked on the loose stuff, the pinion gears go kaput real quick if you give it any stick.

I was specifically looking for the later one with the electronic solenoid to lock the cdntre diff, so I didn't have to worry about the extra movement in the lever. In fact, I was sure I could keep the existing setup and just wire the switch in. But still.....

Maybe you want to hold off on the LT if you need the centre lock, and find another one?

[DoubleChevron]

Sorry mate,

Haven't been online much recently works been hectic and I had another car with more 'pressing' issues to attend to..

AFAIK, D2 with CDL is the one you need, but you got the one without.

Not to worry, if you don't need the centre diff locked. You can shove an ATB centre in there down the track which is as good as a BW vc anyway.

Main issue as far as I understand it with the LT230 is not engaging the cdntre lock when on the loose stuff. If you have good traction it's not a problem, but if it doesn't get locked on the loose stuff, the pinion gears go kaput real quick if you give it any stick.

I was specifically looking for the later one with the electronic solenoid to lock the cdntre diff, so I didn't have to worry about the extra movement in the lever. In fact, I was sure I could keep the existing setup and just wire the switch in. But still.....

Maybe you want to hold off on the LT if you need the centre lock, and find another one?

It has a center diff lock (you can see it in one of the piccies). The issue is the linkages ... you need them too. No-one wants to sell linkages as they appear to be worth more to sell than the entire LT230 (As all the disco II owners will pay a premium to get them :) ). I think I've chased up a set of linkages from the '88 Rangie being wrecked on ebay.

seeya,
Shane L.

[Mercguy]

hey Shane, how did you go with the LT230? did you end up changing out the front propshaft for Disco one or still using rrc?

[BigJon]

I was specifically looking for the later one with the electronic solenoid to lock the cdntre diff, so I didn't have to worry about the extra movement in the lever.

Never seen one of those.

[PhilipA]

AFAIK there is no such animal.

The only electronic transfer starts at 38A with an electronic Borg Warner.
Regards Philip A

[blackrangie]

Ive just blown something in mine, not sure yet need to remove, LT230 with Ashcroft ATB and vented extra oil cover..started clunking hard with CDL on in loose sand trying to turn around on a tight sand track (slow crawl)

Have been driving on a combo of hard and soft sand for 1 week mainly with CDL on with a fair amount of loss of traction at high and low speeds.

550hp and 6speed auto

Questions

Does anyone know what if any are the speed/throttle limitations of both locked and unlocked CDL when an Ashcroft ATB is in an LT230.

What scenario's do you lock/unlock the CDL(only if you have centre ATB) and what speeds and conditions have you used just the ATB unlocked?

Ashcroft reccomend locking CDL with ATB when extended wheelspin is likely.

My guess is its something else has let go in the transfer related to other areas of the box that have not been modified to specs in this thread or syncro website

Anyone heard much about syncro gearboxes duraspec lt230 offerings? Ultra spec is offroad only and basically spool centre.

Also of interest is the 2wd selection they are making or have made im not sure how this compares to ashcroft or avm 2wd kitshttps://www.aulro.com/afvb/images/imported/2017/12/684.jpghttps://www.aulro.com/afvb/images/imported/2017/12/685.jpg

[Tins]

I was specifically looking for the later one with the electronic solenoid to lock the cdntre diff,



IIRC, AMV in Ringwood, Vic did those.

[blackrangie]

So who is the best LT230 builder in OZ?

[Vern]

So who is the best LT230 builder in OZ?No idea. But have you found out what went wrong with yours?

[blackrangie]

No idea. But have you found out what went wrong with yours?Not yet, could be user error