Hi lads I smashed my first mt75 4x4 box two weeks back the good old 3rd gear let go I'v got a spare box witch I'm in the proses of putting in but as my mate Rex has done lots of mt75 boxes I'm thinking over the winter cutting my smashed part off my box and welding it on to a skyline box I'v been told to use a r33 4x4 box . But has any one got any info if this is the right box to use and wot will I need to do as I beleve the box will need a pump wiring up to it any info would be fab . Thanks for you time ps I no I will have to cut my tunel up to get it in witch is not a problem .

 

Reylamd would be a good person to talk to as they did a fair bit of development using these boxes

 

You need to speak to "grahamC" on here he has. Cossie 4x4 mk1 escort with skyline box that he's done mostly by him self

 

do it, do it, do it is what I would say don't waste any money on the mt75 put that money towards the conversion and have a car you can abuse and not worry about.

they are very tough gearboxes, ive thrown 570 hp 480lbft at a stock r32 gtr box with loads of 3 second 0 - 60 pulls and never a problem.

you can also have fully adjustable 4wd by controlling the pressure to the 4wd clutch and easily run rwd aswell.


r32 boxes are push, p33 pull I think or the other way around lol

 

turboshed on the xrocbb fitted one to his xr4x4. i think he's scarabman on here. if you search he did a build thread on it.

 

Thanks lads it was graham c
That told me he has the r33 box in his mk1
I think I will be doing this mod over the winter it will be going into my focos .

 

Thanks very much mate for the info . So am I right in saying if I don't run the oil pump it will just run rwd

 

As we are talking about maybe doing this mod dose any one no of any skyline brakers as I'm going to need a bear box and the front and rear pops to get uj,s of them to have them put in my shafts

 

I think so yes, if the 4wd/abs fuse is pulled on an r32 there is no power out of the clutch at all, but with an r33 it wasn't as simple as that, I don't know if its pressure related or if there is some mechanical lock there but the 4wd wont completely disengage on an r33/r34 by disableing 4wd/abs.

martin will know, I had a 4wd fault on my r33 and the system wasn't engageing but it still applied 60lbft to the front hubs on the dynapack whereas an r32 will not it will just go 100% rwd.

 

r32

http://www.ebay.co.uk/itm/Nissan-Sky...item3f3c8d51d9

r33

http://www.ebay.co.uk/itm/R33-GTR-Sk...item4adb002809



they can suffer with synchros like any box but redline heavyweight oil does work wonders with a worn gtr box

the later r33 box is a better/stronger gearbox aswell.

 

Thanks very much for the very good info mate

 

ill alert graham to this thread

 

Thanks mate

 

I thought about this and by the time you buy all the bits get stuff made have the box reconed as it will more than likely need it as syncros go for a past time plus the boxs are a very slow change you will be into a oppliger gearkit price range and its strong fast changing and fits without all the issues of changing everything

 

agree with Jay on this one, the oppliger gear kits have been proven to be reliable now, why piss about when there is a proven solution with the oppliger kits.

 

Some very good pointers there lads about the opliger gear kit as I'v had one in my hands only last week as my mate Rex is putting one in his escort . The thing is it's aprox £2000 then it's got to be fitted so let's call it £2300 in one big hit witch I just can not aford as I'm just about to do the setelmont to my devors I'm going throw . So with the sky line box way it's £400 / £600 for the box I can cut the bell housing,s and get welded for and £30 I can mod the tunel so free my time and labour over the winter free I will be onist I'm 100% I can get one in the car and working for under £1000 and if the box need a over hall I will get it done when I can aford it . Don't get me rong lads I would love to just do the bolt and play way but I just don't have the ££ to had with this devors

 

Not to be nasty, but if you think you can achieve a skyline transmission conversion for a grand, I suggest you really sit down and think about it more.

 

+1, i think it'll cost a few quid to convert the bellhousing alone.

 

Like Rog says you wont do it for 1k even if you do the work ! Yes on paper costing it might look like that but it wont happen but I can see your predicament but personally I would wait until you get some more funds

 

Isn't the skyline box also a lot heavier than the mt75?

 

I can see ware your coming from but I was a tool maker and i still have a lath and a miller and i all so made jigs for a living so all it's going to cost to do the bell housing is the welding .
But as you have all said I will sit down and have a think about it but I still think I will be doing it . As at the end of the day I'v built a focos 4x4 my self shell mods the lot . I will keep you updated on wot way I go

 

with a lot of time if you cut the flange off your old box and get the box lined up perfect and marked all you need to do is get it welded on.

make a gearbox mount fit would be easy enough to make out of both mounts. propshafts can be altered for not a huge amount of money, you will have control over the 4wd aswell.

just the clutch to sort then which will need to be hydraulic converted.

id say if I wanted to do one I could do it for about £1500 but that would be me doing most of the work myself.


but if you don't have the ways/means to do it all yourself it would probably end up cheaper to do what jay has done for £2300

 

You have to ask why you are doing it, for me it was active center diff and the availability of cheaper gearkit conversions.

I made all the bits for mine, cut, welded, milled, box rebuilt/props/hydraulics etc and its cost me approx £1500+ all i bought was the main components.

I have a few more fancy bits than most on it but budget at that price if you doing it yourself and expecting it to work.

I see no advantage in doing it and not controlling the center diff correctly.

 

If you have 2 k oppliger motor sport can do you a box good value ! As the skyline box will hit that much really so it down to wot you won't really

 

Exactly I still wouldnt fit a box standard box as there strong enough for power but 48 kilos heavier iirc very slow changing but its up to you , if i had the cash i would be buyig a oppliger sequential box now lol

 

Still doesn't get you the advantage of active center diff though.

 

no but unless good money is spent in controlling it properly its almost pointless

 

good point jay, ideally it would need the attessa pumps unit with it then use this controller


http://www.google.co.uk/url?sa=t&rct...mgRLSguIS_uBKw



fully adjustable 4wd then and also self adjusting through an accelerometer and giro thingy bob lol


in all honesty though where do you stop then the diffs will need sorting for big power, its one of the reasons I went to the darkside as an old rb gtr will take 600 hp all day long on stock gearbox and diffs

 

Well you no I had a midnight purple 33gtr stage 2 and my 500bhp gtst and preffered the gtst as the engine was more torquey and like you say the 4ed system takes a battering it still felt a little out of touch with the driver lol and sapped power

 

Yes, i have that in with my price above, mapped, 4 presets, gain adjustable, brake and handbrake input, accelerometer and de-cellerometer all controlls the attesa pump/accumulator and solenoid 😉
The controller was the single most expensive part.

Like most people would spend 10k on an engine but crib at 5k for a box on here.

 

box 400-500
spinner plate 230+vat
welding 400-500
front prop50
gearbox mount 50
rear prop mines fancy 250
center push clutch depends wot you use 130-200 quid
pump for box 100
plus pipes and controlers martin dose one for 250
but you can do it cheaper like me
not cheap conversion but when i did mine no other boxs are good for 500 hp

 

Any specifics on the exact kit id need for my 4x4 or a link please mate been looking at gear kits i cant fibd one for that money

thanks in advance

 

There you go

http://www.oppligermotorsport.com/in...=97&Itemid=205

 

Cheers jay

 

a touch over £1500 at current exchange rates, fingers crossed my house extention and work doesn't take all my money.

 

Bottom gear kit fil?
think i may have the diffs aswell

 

r32 gtr gearbox £250

http://www.gtr.co.uk/forum/299073-r3...x-50000km.html


I know what id be doing, and having a rwd switch aswell

ive had 3 rb26 gtrs and all the gearboxes have been very tough, they get a lot of stick aswell with 600+ up em being hammered and 0 - 60 in 3.2 seconds ive done on a stock r32 box and they will take it well

 

i did want to go this route but martins stopped doing mechanical work now i beleive hes the only one who offerd a full conversion im not savy enough to atempt it myself

 

The oppliger sequentials are big bucks and straight cut only so might be a tad much for road only. The close ratio ones in the long box are supposed to be much better suited to Cossie power as the Cossie was quite long (some would say over geared) from the factory.

 

did you see the kits in the link jay posted they seem very reasonably priced no?