transfer box

my question is how much difference is there in the defender transfer box and the discovery one ?
ive got a series 2a short wheelbase fitted with a 3ltr ford v6 so was thinking it might be better with a higher ratio transfer box fitted .
ive always had the series gearbox in before but ther kept on packing in so will the lt77 be a better gearbox for it ?
thanks in advance ..
carl .

1:44:1 v 1:22:1 high range.
If you want big wheels then keep defender box, if you want better cruising on standard wheels use disco box

What gearbox are you running a defender/Disco/RR i,e LT77/R380 or a normal series gearbox? gearbox??

My previous reply assumed lt77

always had a series 2a in before but just been rebuilding it on a new coil sprung chassis so thought i would replace the gearbox with a newer item . got a discovery gearbox and a defender one think the disco will be too long in the bell housing though but was told you can swap the transfer boxes .

carlcurtains said:

always had a series 2a in before but just been rebuilding it on a new coil sprung chassis so thought i would replace the gearbox with a newer item . got a discovery gearbox and a defender one think the disco will be too long in the bell housing though but was told you can swap the transfer boxes .

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So it's not tax exempt.
LT230 same transfer box, but if you have defender type handbrake and disco transfer box-need to drill and tap holes for it