Sub FindReplaceAll()
'PURPOSE: Find & Replace text/values throughout entire workbook

Dim sht As Worksheet
Dim fnd As Variant
Dim rplc As Variant
Dim p As Integer
Dim q As Integer
p = 3
q = p + 1
fnd = "$3"
rplc = "$" & q

For Each sht In ActiveWorkbook.Worksheets
  sht.Cells.Replace what:=fnd, Replacement:=rplc, _
    LookAt:=xlPart, SearchOrder:=xlByRows, MatchCase:=False, _
    SearchFormat:=False, ReplaceFormat:=False
Next sht
p=q
End Sub