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seco89 05-22-2012 06:48 AM

Diff gears
Hi all just after some advice I'm thinking of changing my diff gears in the near future and wondering what would be best all round I'm currently running 31's but have 29's and possible getting 33's need the gears to suit tyres,towing,fuel consumption and off course in the bush any help

XJ Knight 05-22-2012 06:56 AM

Need to know what engine and trans you have?

seco89 05-22-2012 06:59 AM

4.0l 5speed and current diff gears are 3.07

XJ Knight 05-22-2012 07:04 AM

4.56 for 33's

seco89 05-22-2012 07:25 AM

So what will that do to my fuel use age if I run 29's on the highway

XJ Knight 05-22-2012 07:40 AM

Kill it. You regear to match a certain tire size.. Running larger or smaller tires then your gearing is ment for will have negative effects on gas millage and overall performance. In the case of smaller tires with gearing ment for 33's you will be running at a very very high rpm for the speed your going

seco89 05-22-2012 07:59 AM

That's y I need gears in the middle to suit these needs because ATM I'm doin 60 mph and sitting on 1700 rpm I just want to bump the rpm up a bit so I'm not goin down gears at a hill to keep goin up the hill

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