Outer Limits 4x4 Board

I've bought a bundera with reduction grearing. It revs at about 3400 at 110km/h and i want to lower the rmp. I dont know what kit has been installed but is it likely that the high range can be returned to normal without chaning the low?

Bigger tyres.

Change diff ratios.

IIRC the gearing sets come with a fixed combination of ratios (ie high and low ratio geras cut from the same lump of metal) and you cannot simply change the high ratio only.

22R or 2LT syzygy

It's actually a 5L hilux motor...

I'm not sure if the revs are a problem, but they seem very high.

It would be out of the efficiency range of the motor i would have thought. It does run hot but that could be unrelated.

its quite common in the hilux's for them to run 3100-3250 RPM with these motors and 31's....

If you have crawler gears then change the diff ratio's, you don't normally change high range when you put in crawler gears in bundies...

But the RPM isn't that far from normal... not that it makes it right

Best thing and easiest is to run bigger tyres if you have the room in the guards...

Brad

Syzygy wrote:I've bought a bundera with reduction grearing. It revs at about 3400 at 110km/h and i want to lower the rmp. I dont know what kit has been installed but is it likely that the high range can be returned to normal without chaning the low?

Reduction (rockhoppers) gears only affect low range.

Changed Diff ratios will affect Low and High.

peak torque is closer to 2500 so its reving way to high IMHO.

my 3L lux revs at 3000 at 120 and this is perfect I feel. good torque to 120km and peak torque at 100km/h.

lift a wheel and spin it and count how many time it turns to one turn of your rear drive shaft. halve this and this gives your diff ratio.

chances are its 4.88 or higher.