In the second part of their case, they demanded equal treatment with men on bonus payments. Male ground maintenance staff at Cleveland CC had regularly earned around 40% more.
The four unitary councils that took over from Cleveland CC last April have settled out of court and will pay the women£4m compensation.
Rodney Bickerstaffe, general secretary of Unison, which represented the women with the GMB, said the settlement would have far reaching consequences for other councils.
'Other councils should now examine their pay rates and ensure that they do not end up with similar equal pay claims,' said Mr Bickerstaffe.
The settlement includes a promise from Middlesbrough, Hartlepool, Redcar & Cleveland and Stockton on Tees BCs that they will examine their pay systems with unions to ensure equal treatment.
An out-of-court settlement was reached last August after unions argued that the women's pay and hours had been unfairly cut to prepare for compulsory tendering while male staff were unaffected.