Outer Limits 4x4 Board

Seen quite a few questions popping up about different gearing options and there seems to be a need for some figures so here is what I have worked out when I was looking at the Sierra t-case to go in my Vit. There may be other ratios available from other manufacturers and if so add please them to this thread. These figures are what I have gained from searching sites and calculating the ratios. There may be errors so confirm for yourself.

High Low
% Ratio % Ratio

Sierra Stock 1.409 2.268

Calmini 4.16: 12.2% 1.58 83.6% 4.16

Calmini 5.14: 18.3% 1.67 127% 5.15

Calmini 6.5: 20.2% 1.69 187% 6.51

Rocky Road 4.16: 12% 1.58 83% 4.16

Rocky Road 6: 24% 1.75 170% 6.12

Rocky Road 8: 24% 1.75 260% 8.16

Trail Tough 4.16: 12% 1.58 84% 4.24

Trail Tough 4.9: 16% 1.63 115% 4.88

Trail Tough 6.4: 17% 1.65 181% 6.37

Rockhopper S4: 24% 1.75 180% 6.35

Trail-Gear 6.5: 20% 1.7 187% 6.5

Good Idea CJ, I agree with your observation.

My understanding is that the above mentioned 'Sierra Stock' ratios of 1.409 and 2.268 only apply to 1300 NT, WT (leaf sprung only). So for those who have 1L, or coilies, this is what I know to be their stock ratios:


1-litre Sierra Stock (SJ-40): 1.580, 2.511

Coily Sierra Stock (SJ-80): 1.320, 2.123

LOWRANGE OFFROAD 6.5:1. 20% reduction in high and 187% reduction in low. Should suit 33's and 3.7's. NO QUESTIONS asked replacement guarantee.
http://www.lowrangeoffroad.com/samdrivetrain.htm

jimny

stock 1.32 high, 2.145 low
trialjimny gears 1.63 high (23%), 2.64 low (23%)
APIO gears 1.32 High (0%) 3.382 Low (58%)

Trialjimny and APIO gears 1.63 High (23%), 4.169 Low

these are all with the CHAIN drive t/case


Mitch


PS this needs to be in the BIBLE

want33s wrote:LOWRANGE OFFROAD 6.5:1. 20% reduction in high and 187% reduction in low. Should suit 33's and 3.7's. NO QUESTIONS asked replacement guarantee.
http://www.lowrangeoffroad.com/samdrivetrain.htm

i think thats just a site what sells the Trail-Gear 6.5

ofr57 wrote:

want33s wrote:LOWRANGE OFFROAD 6.5:1. 20% reduction in high and 187% reduction in low. Should suit 33's and 3.7's. NO QUESTIONS asked replacement guarantee.
http://www.lowrangeoffroad.com/samdrivetrain.htm

i think thats just a site what sells the Trail-Gear 6.5

That is correct. CJ said "There may be other ratios available from other manufacturers and if so add please them to this thread."
6.5:1 (20%H-187%L)wasn't listed.

oooh I've seen it after its been edited

Vitara

Low range ratio and reduction.

Stock 1.816

Rockhopper 4.16 129%

Rocky Road 4.4 142%

Calmini 4.24 134%

Trail Tough 4.24 134%

High range is 1:1 for all gears as there is no reduction available to the high range.

The crawler gears will fit all Vitara's '91 on and will fit GV's with a 1.6 4cyl auto & manual, 2.0 4cyl auto & manual and 2.5 V6 4 speed auto only.

Here's a couple of calculators.

http://www.novak-adapt.com/knowledge/gearing.htm

http://members.optusnet.com.au/~zerosin/gearcalc.html