yes but that has nothing to do with altering t/box ratio, with the 1.2 box fitted in a defender you have the same ratios as disco but usually taller tyres,its the tyre were over gearing is going to occur
1.2 lt230 fitted to 300 tdi disco is the same as fitted to defender r380s are the same except the gear change,diff are the same only variant is tyre size,later q boxes are equivalent on both they just have finer teeth than tdi boxes
no r380 and the lt230 are same as fitted in manual disco so are the diffs so its only tyre size that might vary,defenders tend to run taller tyres so it ups the gearing as such
the pin wont drop down until the shaft below it hole lines up which happens when the red lever is pulled back and outer shaft behind the tin cover slides forward