I have a brand new reconditioned rb20det gearbox.
this box has done very low milage
I'm a mechanic and rebuilt it myself, this is the one with dual synchro rings
1st-2nd-3rd. they also have cast iron selector forks, not alloy as the standard r31 style have.
$287 in parts. I have reciepts
gearbox only, comes with shifter
sell for $600 you won't find another one in better condition
PH: 04222 03694
located in Forster NSW (mid north coast)