Great move on hitting the rehab but you really need to think HARD on the sub plan they will only suck you back in try and exit rehab clean an sober you stand a greater chance of making best wishes.
I agree with Motye51, why get on subs after you get out of rehab? They will detox you once your there so there is no point at getting on subs. Subs weren't created to be a long term solution anyways and a lot of people end up abusing them.
In terms of your question and methadone detox...Im not sure because everybody is different. You said you've only been on methadone for 2 months so hopefully you will feel better faster than someone who has been on it for years.
I just wanted to say good morning and welcome....
I applaud you on getting yourself into rehab and yes, there will be w/d off the methadone but i HIGHLY ask that you reconsider finding a sub dr once out of rehab. Are you going to tehab to detox or learn???? W/D from the methadone i would hate for you to then get on the subs and have to w/d off of that....there w/d are VERY similar. Why not try getting clean w/o the thought of finding that sub dr?????