Could someone help with the different spec if any between my98 centre diff and a my99 centre diff both wrx viscous type.i am aware the housings are different and the one will not fit into the other without rear housings been changed.is there any difference in torque settings???

 

AFAIK nicholas, ALL centre diffs have the same torque split R50:F50, with the exception of the Type R/RA electromagnetic adjustible centre diff which is R65:F35

Stand to be corrected though