My jimny... gearing question

Hi everyone. I'm new to this site and Jimnys although not new to suzuki 4x4s, also been a member on Difflock for quite a few years!
I've bought myself a Jimny which has been lifted and has 235/75/15 tyres. I'm pretty happy with it and it's general condition.
The one thing I'm not happy with though is the gearing. High range there is no power and low range just isn't slow enough.
I think I know my options, I'm a past customer of Rockwatts and had a rock lobster t-box in one of my SJs. Although that's at the top of my wish list I'm just trying to weigh up my options with prices.
From what I've read my options are...
Full blown rock lobster with fitting kit and 2 sj props.
Standard 410 t-box also with fitting kit and the required props.
Later VVT manual diffs.

What I'm after is % of reduction for each option.
Rough costs and availability of parts.

I know SJ parts are getting thin on the ground and therefore expensive, you wouldn't believe what I just got quoted when I asked for two diffs from a jimny breakers! (£450!!)

Are there any other options other than smaller tyres?

Thanks for your help!

its fairly simple...

[gearbox final drive ratio in desired gear] x [transfer box in high or low] x [diff ratio] = final drive

so it sounds like you probably have a 2001-2005 jim with a m13 (non VVT) engine, R7ME gearbox, stick/manual t-box and original diffs.

this currently works like this (in high-box, 5th gear): 1.5x1.32x3.909=7.74

so to work out the result from changing any of the parts to other components you just substitute the appropriate number.

For example; changing the transfer box to a rocklobster or mini rocklobster box would work like this: 1.5x1.5x3.909=8.79

This is a 6.8% reduction in gearing in high-box, 5th gear (change numbers to suit other gears).

Then apply some maths to the tyre size to work out the increase in overall diameter as a percentage, and see what you get (235 tyres are 6% bigger than factory size).

Low and behold... you need a rocklobster in there.

Think i must have done this write up for about 3 different posts lately so perhaps i should contribute a writeup to the wiki?!


p.s. Ive got a rocklobster (1.5 high, 4.3 low) box, cradle and props for sale. done 10 miles since built

Riccy

pps... i also have a set of 5 alloys with BFG AT's on in 215/75r15!

I have sent you a pm Riccy