Product Details

For those requiring something different after an engine change or ?tune up? the following will help explain the effect of ratio changes. When deciding, remember R & P changes will change H & L ratio, T case change will only change H ratio (all have the same low ratio). This can be used to advantages; e.g. in a LR90 change R & P from 3.54 ? 4.1 giving a 13.65% drop, now change the T case from a 1.4 ? 1.22 giving a 15.38% raise. Effect is to lower low range only leaving high range approximately as it was. We have included a simple calculation for those wishing to be precise about their speeds. A word of caution ~ over gearing often causes loss of economy as the engine needs to work above its optimum performance.

Torque Settings

1x Pinion flange bolt 100 Nm

10x Crown wheel bolts 60 Nm

4x Journal end cap bolts 90 Nm

R & P Comparisons

3.54 > 4.1 = 13.65% Drop

3.54 > 4.7 = 24.70% Drop

4.1 > 3.54 = 15.81% Raise

4.1 > 4.7 = 12.76% Drop

4.7 > 3.54 = 32.76% Raise

4.7 > 4.1 = 14.63% Raise

Ashcroft Ring & Pinions are built by Antonio Masiero - Italy

Delivery varies between 2 days and 3 weeks 

For any question, please contact OffRoad Projects