[shandy92]

atari4x4 wrote:

^^ datsafrontshaft

you know what i meant!

[DarkHorse]

..swateesed...

shandy92 wrote:

below shows the angle of the front shaft,

got_bar_work wrote:

Y did i get gears this sounds heaps better

Starting to think the same thing. Dammit.

[got_bar_work]

The angle should be no worse then now
The vit output might be centered but its heaps high
The sierra case is to the right but alot lower
U might be able to clock the case a bit to make it better

[stocker]

Ok, so just doing some more research With the gearing options, what my aim is to bring the FDR (final drive ratio) back somewhere closer to stock. So I've been using a gearing calculator provided for us in our awesome ' Good Tech Section '

So the final drive ratio on 225/75r15, 29.28inch tyre (stock tyre size) is pictured below on the right
And the modified ratio is on the left, I have based it on use with 4.3 ratio diffs as I was informed earlier that these are available for use with vitaras.

This image being the settings applied to get the numbers


The difference between the final drive ratios


I think that at 3750 rpm should be a good highway cruising speed. As our motors make peak power/torque around 5000 - 5500rpm, this will provide good response on the highway




What are people's thoughts on this?

[tanshi]

IF you can find 4.3 diffs then yeah those numbers work the 100km/h in 5th is a bit low really. Your low range is gonna be goddam aweful. 36:1

Plus by the time you have bought all the bits and made them fit. which is not going to be easy by any means.

2 diffs in 4.3. 1 sierra transfer case

honestly just buy an undertaker, much less work. you will end up with around 4400 in 5th which is bit high but better than low. this is all assuming that you have 5.1 diffs now ofcourse

[got_bar_work]

U need min final crawl of the vit with 5.12 and 4.2
Any less and it will suck in lowrange

[atari4x4]

double check the stock tyre size, pretty sure it's not a 225/75r15

[got_bar_work]

Is it.205/70/15 like a sierra

[atari4x4]

that works out to be 26.3"

time to start again stocker.

[tanshi]

either way the gearing works out the same. when he wants to run 31s

[stocker]

got_bar_work wrote:

Is it.205/70/15 like a sierra

Yep you and Atari are right. I was going off the original tyre sizes that were on mine.

Just looked at the placard. 205 70 r15.

Just recalcu-malated with 4.6 diffs, that will give me




Perhaps the 4.6 diffs could be the go then, I will have slightly better low range.and there's alway the option of dropping a set of gears in for extra low range later on. Also it will rev slightly higher than compared to stock on the highway, which will always be a bonus i guess when your pushing bigger tyres

[got_bar_work]

Ur going to need some sort of gears
A stock sierra case sucks in lowrange with 31

[stocker]

got_bar_work wrote:

Ur going to need some sort of gears
A stock sierra case sucks in lowrange with 31

Is that perhaps because of the ratios of the gearbox in front of it.

If you have a look at the finial drive ratios, it will actually make them better than the stock transfer

[got_bar_work]

U need min 70:1 low first with 31

[stocker]

Why so low? The low range doesn't seem so terrible now

I'm not looking at some rock crawling monster

[tanshi]

i personally wouldnt think it needs to be quite so low.

but on 31s 30:1 is going to be really bad trust me. you will find it dying on hill climbs

i would say if you can come up with 50:1 it will be enough

[got_bar_work]

Thanshi wats 4.2 transfer and 5.12 end up at
Thats what i have with 30.5 tires and it is just low enough
Would be great with a auto

[tanshi]

with a manual gearbox 4.2 transfer and 5.1 diffs is 78:1
with an auto gearbox 4.2 transfer and 5.1 diffs 60:1

[tanshi]

i used to have 70:1 in my sierra on 31s and i used 2nd and some times third
1st was good for crawling but was often too low

[stocker]

I run around now with 31's and I've never encountered whilst 4wding a hill that required more than what 1st gear low range can provide. I don't need to crawl at half a kilometre an hour...

[tanshi]

IF you say so.

[stocker]

tanshi wrote:

IF you say so.

I like your way of thinking.

[stocker]

Ok so lets talk pricing people, what should I be paying for said transfer case.

[got_bar_work]

I paid $300 when i got one for my old coily
Prob cheaper if u look round here
Post a wanted add

[shandy92]

stocker, dont you run 5.12 diff tho? or have a missed it and ur running 4.6:1?

if you cant find any of your side, i know "suzuki shop" here in perth have loads and cheap to. i was going to get one of want33's for $100 when i was looking, ask him.

[stocker]

shandy92 wrote:

stocker, dont you run 5.12 diff tho? or have a missed it and ur running 4.6:1?

if you cant find any of your side, i know "suzuki shop" here in perth have loads and cheap to. i was going to get one of want33's for $100 when i was looking, ask him.

No mate I'm running 5.125 diffs now. I'll need to run 4.6's to correct the over correction of the sierra box... That is because I wish to take it back to driving like its stock, or as close to as possible

Your on the west coast, I'll hit up a few wreckers around here first and see what pops up first, thanks though.

[shandy92]

stocker wrote:

No mate I'm running 5.125 diffs now. I'll need to run 4.6's to correct the over correction of the sierra box... That is because I wish to take it back to driving like its stock, or as close to as possible

Your on the west coast, I'll hit up a few wreckers around here first and see what pops up first, thanks though.

why not just run with the 5.12?? see how they go to begin with and if its to low then change them out. better than changing them out and then it being to high and having to change them back to 5.12!

[DarkHorse]

My recollection of stock gearing is that it sucked arse - snatchy as fuck off the line and buzzing it's head off at freeway speeds. While the former may have something to do with my aggressive driving, the latter was actually better with 31s IMO. Overall an over-correction, and crap in lowrange, but I reckon my ideal gearing for road would be something like the equivalent of 235s with 5.12s, and transfer gears for offroad.

[stocker]

shandy92 wrote:

stocker wrote:

No mate I'm running 5.125 diffs now. I'll need to run 4.6's to correct the over correction of the sierra box... That is because I wish to take it back to driving like its stock, or as close to as possible

Your on the west coast, I'll hit up a few wreckers around here first and see what pops up first, thanks though.

why not just run with the 5.12?? see how they go to begin with and if its to low then change them out. better than changing them out and then it being to high and having to change them back to 5.12!

Something close to 5000 rpm at 110km/h...


No thanks buddy, I want something that drives like a stock vit, not a 1.0L stock sierra

[atari4x4]

easy fix, fit bigger tyres