98 grand cherokee,4.0 6 cyl,42re trans,as the weather gets colder it dont want to shift from 1st to second without flaring the engine speed a little,2nd to 3rd is really bad,once it warms up its fine,it has about 160,000 on it,fluid and filter changed 1 yr ago at 150,000,no problems in warm weather,are the seals old and dried up,or is something else going on?
thanks in advance