Outer Limits 4x4 Board

Hello fellow forumers,
currently driving some Rocky. I think it is a 1984 model, heck thats older than me. Anyway my question is there anyway to lower the gears on my Rocky? Any possibility to change the low range gear in the transfer case?
Or is it there any kit to change the final drive in the diffs?
Btw doesn anyone roughly know what is the ratio of the tranfer case and the diffs?
Sad to say i'm pretty dissapointed with the lack of low gearing. And after installing 31 inch Simex Centepede M/T the gearing feels "off" Previously using 30x9.5 Kumho which is why i'm complaining so u may shoot me on that.

Any other alternative to get better lower gearing on the Rocky? Or should i just bin the axle and source a set of Volvo C303 portal axles with reduction gears build in them. Hehe. Apparently heard there is one running some where on earth but yet to find who's Rocky is it.

Another thing, any suggestion what engine to fit under the bonnet? Find that my 3Y 2.0litre a tad lethargic plus fuel consumption is terrible. 16mpg.
Ouch.....
I would like a diesel but the road tax structure in Malaysia would cost a fortune. Any 4 cylinder carb engine to suggest?

I'm a bit of a rush, i'll introduce myself later.
Happy new year dudes.

Hi, seeing as all the Rocky owners are keeping quiet, I thought I 'd try and help out!

I don't think there are any other gear sets available for the Rocky- so you're stuck with what you've got!

From what I've read the 3Y is a Toyota engine (?)- if so you may be able to swap in another Toyota engine??? Other than that the diesel turbo engine that came out in the Rocky would be the other option- or turbo / supercharge your 3Y.

Here's a link that shows a few different types of 3Y engines- including an EFI version. http://www.engineimports.co.nz/petrol/toyota.htm

I'll attach a pic containing the gear ratios for the Rocky from the factory service manual- sorry about the quality.

Hey thanks for the info.
Yup i'm aware that it is some Toyota engine. Heck even my oil cap states "Toyoda" keke. Oh btw that's the old spelling for Toyota if u aren't aware.
I heard another alternative would be a 4Y 2.2 litre engine which is from the Hilux would be just nice.
But personally i would love to have a 1KZ 3 litre turbo diesel but would cost a fortune. Oh well....

Rarely i get to hear ppl talking about Rocky until i stumbled into this forum.
I hope it would be a bit more rowdy.

Cheers

Howdy,
Sounds like we have very similar vehicles.

The 3y engines are a bit crap, so I have also been looking for an alternative.
after 6 months of consideration I think that the best way is to keep the engine block as is and just change the inlet manifold (and carb) and put on extractors to improve performance (and reduce fuel comsumption).
I am currently looking for a twin weber carburetters (or SU's are OK, good on fuel economy anyway) and will have to find an inlet manifold to suit the 3Y.

To change to EFI means adding all the electronic componenary,
this is OK if you have (can get) all the bits (including wiring loom, etc)
You need to look for a 3Y-EC engine (or at least a head and inlet manifold from one)

There is a 4Y (2.2lt) engine that you could be use, but you will have the same fuel delivery (changing to EFI) concerns.
Though most of the engines that are in hilux's will fit the Rocky
(find good info at http://4xforum.co.za/vguide/hilux.html )

or just put up with the engine that you have
Unless the car is in mint condition and you plan to keep it for 10 years, dont worry about changing type of engine, if you have a great need for better fuel econ and more power you may as well just get a different (and newer, Unleaded) vehicle with EFI that it came with at the factory.


PS (There may also be gearbox alignment problems with using alternative engines)

Hope this is in some way helpful

Hey thanks a bucket load.
Well actually to be honest the engine is not that lethargic for a 20 year old car. Though fuel consumption is pretty bad at 16mpg.
The current engine is fully blueprinted and blanced with reprofiled cams, extractors, straight flow exhaust and running a Weber DCNF40.
I guess the reason that aggrivated the problem is because i recently fitted 31x10.5 size tyres.
So right now i'm trying to figure out if anyone out there has managed to find out a ring and pinon set from any other vehicle that can be fitted to the Rocky to give me a much better aka lower final drive. Then atleast i would know what direction to head toward to when sourcing parts form the wreckers.
Oh btw on a side note does anyone know what are the ratios for the Feroza?

BabyGodzillaGTi-R wrote:Oh btw on a side note does anyone know what are the ratios for the Feroza?

5.27




BUT.......not compatible with Rocky diff housing

Sigh but thanks anyway.
So i assume the diff cage is just way too small on the Rocky?

Hmm i wish i could find more info if there is other posible alternatives and more opinions from Rocky owners.

BUT i really dont wanna go crazy mad by fitting reduction gear hubs/ portal hubs, for e.g like a Volvo C303.

Any more websites to recommend for Rocky owners? Thanks.

BabyGodzillaGTi-R wrote:Any more websites to recommend for Rocky owners? Thanks.

Have you posted questions on the WARFs list ??

Otherwise.....this is the best site on the web for info !!

As for the alternatives.....they have been discussed on this board a few times.

I have dropped Toyota running gear into my Feroza to get the potential for lower gearing....lockers...bigger tyres. For you it wouldn't be that difficult to find the running gear from a wrecked Hilux / Forerunner and either mate the gearbox and t-case to your existing engine or do a complete swap.....diffs and all.

[quote="BabyGodzillaGTi-R"]
The current engine is fully blueprinted and blanced with reprofiled cams, extractors, straight flow exhaust and running a Weber DCNF40.


A very nice engine and mods.
Can I ask where you pick up the manifold for the weber?
And the price?

The early rockys shared a lot of drivetrain componentry from the F20 range(daihatsu) and the SCAT (Toyota). As far as I know the salisbury housings are the same and use the same centre, as the rear lsd from the early rocky will fit in the F20 series, and will fit in the front with a few mods (same deal for detroit lockers). The early F10 ran 5.3 diff gears, F20 ran 4.8, I think from memory the rocky had 3.9's.

Hey. dunno if this is any help, these are the specs from the rocky service manual. Bundyrumandcoke sent this too me earlier this year.

Diff ratios, 3.363 11/37, oil capacity 1.5 litres
Transmission ratios, 5 speed, 1st 3.647 (3.477), 2nd 2.136 (2.037), 3rd 1.484 (1.317), 4th 1.000 (same), 5th 0.860 (0.820), reverse 4.351 (4.148) figures in brackets are for gearbox fitted to turbo charged vehicle, oil capacity 2.9 litres
Transfer ratios, high 1.297, low 2.370, oil capacity 1.3 litres

I noticed the crawl is nothing to be proud of too but am in the same boat as u not knowing what to do. Have considered fitting hilux axles so i also get spring over as well as better coice of ratio, but cost has slowed that idea down. if anyone has got any info on the f-series diff centre swap or lockers could they send it my way too as well cause my mate is gettin rid of his f20 soon for real cheap

3.363 diff reduction is for diesels petrol 3y is 3.909
flat tray is lower again but dont know how much?

Ferozius wrote:

BabyGodzillaGTi-R wrote:Oh btw on a side note does anyone know what are the ratios for the Feroza?

5.27




BUT.......not compatible with Rocky diff housing

Feroza diff ratio is actualy 5.29
Automatic ferozas which are rare came out with 5.57 diff ratios

Hey guys thanks for the input and enlightening this ignorant fool when it comes to 4wds. :p

The early rockys shared a lot of drivetrain componentry from the F20 range(daihatsu) and the SCAT (Toyota). As far as I know the salisbury housings are the same and use the same centre, as the rear lsd from the early rocky will fit in the F20 series, and will fit in the front with a few mods (same deal for detroit lockers). The early F10 ran 5.3 diff gears, F20 ran 4.8, I think from memory the rocky had 3.9's.

Pardon my ignorance but F20 and F10 are they the grandfather of my Daihatsu Rocky? Is it by chance also known as a Daihatsu Wildcat?
So if i want a lower final drive i should try sourcing either the 2 axles and salvage its crown and pinon to give me a final drive of 5.3. So u guys discount a posibility?Hehe
Fingers crossed.
But if i do the swap can i should be able to retain my Detroit locker right?

A very nice engine and mods.
Can I ask where you pick up the manifold for the weber?
And the price?

Nah it is pretty slow. Probably a Feroza would beat me down the 1/4 mile while it will take me a year or 2 to pass the line. Any i'm still retaining the standard manifold as the Weber DCNF series are downdraught. I think what u are referring to are the ever awe inspiring DCOE sidedraught.
I cant remembered the hp figures but if i recalled it was dynoed close to 100hp. But take it with a pinch of salt. Btw not to sure about the price as it was done up some 13 years ago.

Ferozius
Posted: Mon Jan 12, 2004 10:45 pm

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As for the alternatives.....they have been discussed on this board a few times.

I have dropped Toyota running gear into my Feroza to get the potential for lower gearing....lockers...bigger tyres. For you it wouldn't be that difficult to find the running gear from a wrecked Hilux / Forerunner and either mate the gearbox and t-case to your existing engine or do a complete swap.....diffs and all

Dont shoot me but we do have a Toyota Hilux 2.8 litre solid axle with a turbo and a charge cooler from an ST205 Celica fitted to it. Just done up a bit here and there. Ultimate leaf springs, DeCarbon Shocks, Lock Rite locker rear and lsd front, ARB Bullbar, M9000Warn winch, Piaa 80series lamps, roll cage, and a person who is typing this who wished he could drive it as i dont have the license to do it.

That aside, so u think it is possible to directly bolt on the Transfer case from the hilux to the Rocky? Hmmph. I wonder if it is a direct bolt on. Hmm i wonder what are the ratios on that.

Yes BabyG, the F20 and the F10 are the grandaddys of the Rocky, perhaps the Wildcat is the same rig, just with another name for KL import.

I had a mate with an '84 2.8 TD rocky, LWB, he had an LSD from the early F20 fitted in the rear of his rocky, and a detroit for the rear modified to fit the front diff, so yes, you should be able to keep your detroit locker.

Here is a pic of my F20:

Been a while since i've time to checked to forum.
Hey Area54, so looks like there might be a possibility to use the F20 ring and pinon for my Rocky......
But i've yet to find one in my trips to the wreckers. ARGH....

What is your opinion of changing the gearbox and tranfercase and if possible what would u guys think of changing to? If only it is simple as changing the low range ratio...........

Okay now this is the Million Dollar question of the day.
What Petrol engine that is 4 cylinder that would be a good choice to dump in?
My 3Y sucks.......
So what do u guys think of say a Nissan Terano KA 24, or a Toyota 22RE, Toyota 4Y, Toyota 3RZ-FE, or a Pajero 2.6litre engine?
Suggestion and opinions will be gladly appreciated.
Dont mention force induction please as my requirement is good low end and good engine braking for steep hills yeah..... Dont mention V8 as they are non existent.
I guess dumping in an engine will satisfy my lust for power and better lowe end and engine braking.
Cheers.

Depending on the length of your wheelbase, (steel roof/soft top or fibreglass resin top) you will be able to fit in a Hilux gearbox and transfer case behind a 22RE if that is your motor of choice. This will give you a better low range, and in the future you can buy lower case gears if you wish. I can measure the total length of my hilux box and case for you if you like. One problem, you will have to offset the box and motor to one side to counter the offset rear diff housing, but not a big problem.

If you want any more info, ask here.

Mine is the lwb with that big glass fiber rear thingy. Model F85.

Depending on the length of your wheelbase, (steel roof/soft top or fibreglass resin top) you will be able to fit in a Hilux gearbox and transfer case behind a 22RE if that is your motor of choice. This will give you a better low range, and in the future you can buy lower case gears if you wish. I can measure the total length of my hilux box and case for you if you like. One problem, you will have to offset the box and motor to one side to counter the offset rear diff housing, but not a big problem.

Okie so any idea which hilux gearbox and tranfer case to get? Or they are all the same. So in your opinion any competent mechanic should be able to do this as a straight forward job or is quite a hassle? Btw are u roughly familiar what is the gearing of the hilux gearbox and tranfer ratios? Probably i'll see how much % reduction assuming i'm still retaining the standard 3.9 final drive.
That aside what would be the engine to go for? 4Y or 22RE. Or is there any other motor that would be lovely. Preferrably something 4 cylinder.

It would be best to get the donor motor and gearbox from the same rig, that way you get all the nuts and bolts to make it happen, from an 84 onwards hilux, will get you something similar to the 22re, depending on what you have available there in KL.

Any competent mech would be able to handle it, but it might cost you some coin as you would be looking at new engine mounts, gearbox/transfer case mounts, new shafts, and a host of other things that may not become apparent without some thought.

I did have some info on ratios around here somewhere, I'll try to find them and post them up.


You may be able to fit the 4y in front of the box you have now for more power and less hassle, but then you wont have the gearing options. Everything is a compromise...

Any idea roughly how much percentage in reduction i'll probably achieve by changing the gearbox to the hilux version? Oh btw are the ratio's on the diesel 3L the ones to go for as it seems they are the only one available back home.

This might sound silly but some years ago when my dad was really into offroading he actually was in the process of building a 4Y engine. Then beats me what happen to it. Just got lost somehow.

Hey on a side note between a Toyota Hilux and a Daihatsu Rocky what would be a nicer off road rig to have? If only i had the green light to drive my Dad's Toyota Hilux i wouldnt be bitching trying to get the Daihatsu Rocky to come close in terms of power and gearing. Hahaha.