Transmission Ratio info and gear calculator

[ScottieJ]

http://acksfaq.com/gearcalc-01-04-07.php" onclick="window.open(this.href);return false;

http://www.lepayne.com/gears.html" onclick="window.open(this.href);return false;
Use this to calculate what ratio Diffs/tbox gears you need to correct your SJs gearing with bigger tyres.

Tim Pinks gear calculator spreadsheet download http://www.suzukiclubuk.co.uk/pdfs/Gear ... lator.xlsx
Ratios can be found below

410 4 speed gearbox ratios
Top = 1.0
3rd = 1.421
2nd = 1.945
1st = 3.163
Reverse = 3.321

410 5 speed gearbox ratios
Top = 0.79
4th = 1.0
3rd = 1.42
2nd = 1.94
1st = 3.16

410 Final drive (Diff) 4.111

413 gearbox ratios
Top = 0.86
4th = 1.0
3rd = 1.42
2nd = 1.95
1st = 3.65

Final drive 3.909

Samurai gearbox ratios
Top = 0.795
4th = 1.000
3rd = 1.423
2nd = 1.947
1st = 3.652

Final drive 3.727

410 Tbox (early)
Hi 1.590
Lo 2.557

410 Tbox (late with 4wd switch after July 1983)
Hi 1.580
Lo 2.511


413& Samurai Tbox
Hi 1.409
Lo 2.268

Rocklobster
Hi 1.580
Lo 4.16

Vitara SWB 8V

Manual Gearbox ratios
1st 3.65
2nd 1.95
3rd 1.38
4th 1.00
5th 0.86
Reverse 3.67

Final Drive 5.12

Automatic Gearbox ratios
1st 2.40
2nd 1.47
3rd 1.00
4th NA
Reverse 2.00

Final Drive 4.62

Transfer box ratios
Hi 1.00
Lo 1.816

X90 RWD Gearbox
1st 3.65
2nd 1.95
3rd 1.38
4th 1.00
5th 0.80

Available SJ Tbox gear ratios and their tooth counts.

[Newtomud]

Hi Scottiej, You messaged me rescently about the differences between a 410 and a 413 T-box.. (2+1/2 turns / 2+1/4 turns)..
So That relates to the numbers above.. 410 low 2.51 (turns) and 413 low 2.27 (turns) ?

Another question is I've seen rock crawler gears for sale that gear the T-box to 6.5 to 1.. So that would be 6+1/2 turns and very much lower? Too low?

What about the calmini rockcrawler gear set..The advert doesn't give a ratio.. just says that it's got a 83% reduction in low. Again, too low?

[ScottieJ]

Hi Scottiej, You messaged me rescently about the differences between a 410 and a 413 T-box.. (2+1/2 turns / 2+1/4 turns)..
So That relates to the numbers above.. 410 low 2.51 (turns) and 413 low 2.27 (turns) ?

Yes that is correct

Another question is I've seen rock crawler gears for sale that gear the T-box to 6.5 to 1.. So that would be 6+1/2 turns and very much lower? Too low?

Yes it would be 6.5 turns in low; this would be good for 32-33" tyres running standard diff ratios

What about the calmini rockcrawler gear set..The advert doesn't give a ratio.. just says that it's got a 83% reduction in low. Again, too low?

An 80% reduction in low is pretty much equal to a 4.16:1 gear set; the same as a rocklobster and is good for 30-31" tyres running standard diff ratios. If you want a rocklobster the best thing to do is source a 410 and 413 transfer box and send them both to Rockwatt in the traders section he does them for a good price.

Then if you want to run 35"+ tyres you'll want a transfer box with 8:1 low ratio

[Newtomud]

Thanks for taking the time to check out my questions.. Been looking for a 410 T-box but there seems to be a lot of tossers on ebay who haven't got a clue what there selling.. I've spoken to rockwatt/richard a couple of times and he will build me a rocklobster as soon as I get the 410 box, just thought I'd get an education and understand/research the other options... Thanks again. John.

[dan_2k_uk]

this is pretty handy and has all the samurai stuff in the drop down boxes including rocklobster but missing 410 t-box but ratios are above.

gives road and crawl speeds and more

http://www.grimmjeeper.com/gears.html" onclick="window.open(this.href);return false;

[ScottieJ]

Good find that is awesome.

In low low 1st gear at idle ill be doing 62feet per minute

[mike harris]

jesus, i just put my gearing in lol !!!

with 34 inch tyres, 5.1 box, 5.125 diffs.

omg 1-3 mph in first in low !!! hahahaa !!

mike

[Team Pink]

I have been messing around with XL and have put together a calculator (I like to see things visually so have added graphs) It is also, for me, easier to use as I do not have to enter all the data to change one thing.
Working through my gearing on the racer with the new gearbox and axles I get 86mph flat in 5th in low box. This is ideal as I personally would not want to go much faster on leaf springs + I always have the option of high box which will give me 11/2 extra gears and a top speed (probably unobtainable) of 137mph.
The spread of the ratios on the Carlton box is good, the change 2 to 3rd drops the revs by 150 rpm more than is ideal so I will need to hang on to second a little longer than the other gears
If anyone wants the XL calculator let me know, it is not pretty but it does work.

Tim

[ScottieJ]

Hi Tim if you could email it to me on Scottiej @ suzukiclubuk.co.uk (obviously without the spaces) i should be able to host it on the server for anyone to download if that's ok.

Cheers

Scott

[ScottieJ]

Nice one Tim, That is a very handy gear calc indeed

Anyone who wants to try it you can download it by clicking this link http://www.suzukiclubuk.co.uk/spreadshe ... lator.xlsx" onclick="window.open(this.href);return false;