yeah lightweight is cheap horsepower. but horsepower is useless if you can't get it to the ground!

the thing is, it's wheelspinning with slicks - so something is wrong with the weight transfer. a set of 90/10 shocks might do the trick up front, but they're plain horrible to drive with.

i mean, ANY diff will prob be heavier than the one you have in there - so it's just a matter of how much heavier. the 9in will be about 55-60kg more than a hilux / BW rear end - depending if you run gearsets or a full spool.

if it were my car, i'd choose the commodore / skyline BW and fit up a 4.5ish detroit locker. i'd keep the std leaves and just run a 2link / trampbar rear end instead.

but that's just my o-pinion....pardon the pun