Shrewsbury Town have moved top of League Two tonight after beating Accrington Stanley 2-1 at the Crown Ground to leapfrog Burton Albion.
However, Grant struck again on 87 minutes to snatch the points as Micky Mellon's side moved to the summit.
However, Matt McClure jeopardised the victory after being sent off for violent conduct on 70 minutes, but Tranmere failed to make the most of their numerical advantage as Wanderers held on to stay third.
Tom Soares struck the only goal of the game on eight minutes as Bury moved level on points with the Hatters in fourth.
Bruno Andrade pounced with an 89th-minute winner as the hosts moved level on points with eighth-placed Argyle.
Charlie Wyke's strike on the half-hour mark was enough to stop the rot as United move 21st, two places and two points above the drop zone.
Scott Harrison's own goal helped the hosts into a 1-0 half-time lead, before Billy Bingham sealed the win on 66 minutes to lift the Daggers six points clear of danger and leave Hartlepool seven points off the pace.
Results in full: AFC Wimbledon 0-0 Southend, Accrington Stanley 1-2 Shrewsbury, Bury 1-0 Luton, Cambridge United 0-3 York, Carlisle 1-0 Cheltenham, Dagenham and Redbridge 2-0 Hartlepool, Newport 0-1 Mansfield, Northampton 1-0 Portsmouth, Oxford United 1-1 Morecambe, Stevenage 1-0 Plymouth Argyle, Tranmere Rovers 1-2 Wycombe Wanderers