I ran standard gearing up to 33in tyres without any concern, but when I switched to 35s, the standard gearing was a little lacking - my main concern was the loss of torque off the the line. Under good advice I went to 4.56:1 and this has made a noticeable improvement off the mark and even better in the bush. In my opinion, 4.56:1 with 33s would be awesome off road, but would create really short gear changes and crap fuel economy on road.
I do however cruise about 300rpm more than my mates are doing in the same rigs (less gearing changes) and while I have better acceleration and can hold the same gear for longer on steep hills, my fuel consumption is always noticeably more than theirs - on a 6000km trip, I spent and extra $500 on fuel.
Now that I am fitting a turbo, I expect to have a decent increase in torque which may allow me to go back to standard gearing. I strongly suggest you fit your supercharger and determine exactly what size tyres you want to run before making any gearing changes. It isn't a cheap mod making it a potentially expensive mistake. Additionally, the lower your gearing is the smaller the sun gears (or spider gears) are in the centre of the differential. Being smaller in size means they have less metal and thus less strength.
As another option, check out Marks Adapters for low range reduction gearing. This will allow you to keep reasonable high range gearing yet give you a real slow crawl speed off road - great for climbing really technical, low speed hills, rocks and drop-offs.
I do however cruise about 300rpm more than my mates are doing in the same rigs (less gearing changes) and while I have better acceleration and can hold the same gear for longer on steep hills, my fuel consumption is always noticeably more than theirs - on a 6000km trip, I spent and extra $500 on fuel.
Now that I am fitting a turbo, I expect to have a decent increase in torque which may allow me to go back to standard gearing. I strongly suggest you fit your supercharger and determine exactly what size tyres you want to run before making any gearing changes. It isn't a cheap mod making it a potentially expensive mistake. Additionally, the lower your gearing is the smaller the sun gears (or spider gears) are in the centre of the differential. Being smaller in size means they have less metal and thus less strength.
As another option, check out Marks Adapters for low range reduction gearing. This will allow you to keep reasonable high range gearing yet give you a real slow crawl speed off road - great for climbing really technical, low speed hills, rocks and drop-offs.
