Sharif, who was ousted by Musharraf in a 1999 coup, told a rally of 7,000 supporters on Sunday near the eastern city of Lahore that the election would sweep away the current regime.
"God willing, the rule of usurpers will come to an end," he said amid chants of "Go, Musharraf, go" and "Prime Minister Nawaz Sharif."
Rising violence has put a damper on campaigning ahead of the voting, especially in the northwest, where a suicide bomber killed 27 people on Saturday at an election rally by a secular Pashtun group.
No group claimed responsibility, but suspicion has fallen on Islamic extremists.
CAPTURE
Meanwhile, Pakistani security forces captured and wounded five suspected Taliban militants yesterday, including the brother of the hard-line militia's former top military commander in Afghanistan, officials said.
Mansoor Dadullah, brother of slain Taliban leader Mullah Dadullah, was arrested after a shootout near a religious seminary in Zhob district of southwestern Balochistan Province at around 10am, a local intelligence official said.
A senior military official confirmed the arrests and said all the militants were all wounded, some critically.
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