Karl Marginson's side will now face Skelmersdale in the final on Saturday.
United took a 2-0 half-time lead thanks to Adam Carden and Rory Patterson. But two goals from Neil Zarac ensured a second-half full of tension.
Ultimately Jerome Wright's 68th-minute strike proved to be decisive, sending the crowd into raptures.
After riding their luck early on with Ryan Salmon clipping the bar and Zarac firing narrowly wide, United took control.
Their opening goal, on 22 minutes was a move of real quality as Patterson's first-time pass completely opened up the defence for Carden to put the Rebels ahead.
Carden turned provider on 32 minutes when he unselfishly squared to Patterson who had the easiest of tap-ins.
Zarac popped up to ensure it wouldn't be a stroll for United but then Wright sewed it all up.
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Showing comments 1 to 12 and replies | View All
Ian (01/05/2008 at 11:27)
Free Red, Manchester (01/05/2008 at 11:56)
"Swallow swallow swallow,
cos the dippers aren't going to Moscow.
The pill's not so sweet,
when you lose to a cheat,
and you'll be screaming for Rafa to go"
JOHN STENSON (01/05/2008 at 13:07)
As far as F.C. last night goes, just how loud was that ? And Saturday can only get louder. Especially in view of who we are playing. It's the only final the dippers will see this season. Mind yer hub caps !
paul hudspith (01/05/2008 at 14:03)
Philip MaRSHALL (01/05/2008 at 15:06)
Ian (01/05/2008 at 18:51)
Drifter, Mancunia (01/05/2008 at 22:24)
Si, East Manchester, Audenshaw (03/05/2008 at 18:40)
Drifter, Mancunia (03/05/2008 at 19:34)
oldtime red, salford (03/05/2008 at 22:25)
It wasn't always pretty but nobody could doubt the commitment and sheer effort of everyone concerned. Can't wait for next season.
Drifter, Mancunia (04/05/2008 at 10:31)
Philip MaRSHALL (04/05/2008 at 12:31)