well your running a oneway that means your car will feel like it wants to drift and that might be the case. also check your chassis tweak, droop and ride height in that order. ialso you might want to check on binding. a bearing might be shot and that might back it pull. but if its not to extreme then i could just be that your not used to the oneway. so you could also try switching the multi diff to the solid spool. after all that and its still doing it maybe try and switch it to the solid spool and see how it acts.
oh also , never use breaks with a oneway... the car will go right around
Xray '007 US and a bunch of other outdated stuff