[bobbrumby]

After lifting my mums Jimny 2 inches and throwing some 235 75 15s on the gearing is a we bit tall. I did some calculations and the diameter of the tyres increased by 9%. I got a welder and am thinking of mounting up a 1 or 1.3 sierra tcase. Now from what I have found out the 1.3 case will make a 6.7% reduction and the 1 liter will have 20.4%, compared with the jimny transfer. Im thinking the 1.3 wont be enough once you think about the extra weight from the coopers.

I was going to find a 1 liter tcase but was wondering what the revs would run at 110km\h, is there an easy way to work it out?

I am aware that the 1 liter tcase had two variations and the one you want is the one with a 4wd switch. But also do the 1 liters come in both the wide and narrow track versions? As I seem to remember reading you need wide track tcase flanges.

I have read that the conversion also requires a wt front prop shaft and jack shaft, are these differing length from the jimny ones or are the flanges incompatible?

Also are the speedo tone wheels like the one used in the ora kit, available on their own?

Any help would be greatly appreciated, sorry if this has already been asked a million times but just what to get everything sorted before I go wasting the oild girls money.

[greenzook89]

1 Litre cases were only NT, look for a 1 litre switched case, as this is easier to fit reduction gears into later on. There is a DIY speedo pickup thread on BigJimny but I dont have the link.

As for ratios, get your gearbox/diff/tcase ration and smash them into here http://www.grimmjeeper.com/gears.html