Teamsters union members have overwhelmingly ratified a five-year contract with UPS, ending the threat of a strike.

Eighty-six percent of members voted for the five-year contract, which will now take effect retroactively to August 1. The Teamsters said it was the largest margin of victory ever for a contract at the company. According to the union, 58% of members voted.

There was a deal reached on July 25, a week before the union was scheduled to go on strike. Since then, four weeks have passed since the ratification process began.

There was overwhelming support for the deal among union leadership, which voted 161-1 in favor. It was hailed as “the best contract UPS has ever signed.” by Teamsters President Sean O’Brien.

In a statement on Tuesday, O’Brien said that this is the model for how workers should be paid and protected nationwide.

There were, however, some groups of part-time UPS workers who opposed the deal. Due to opposition from part-timers, whose pay is still less than full-timers doing the same job, the outcome of the vote was uncertain. The results showed that despite opposition from some members, the deal had widespread support among workers of different classes.

Although the union achieved many of its key negotiating goals, including raises retroactive to August 1 of $2.75 an hour and at least $7.50 per hour for full-time employees over the life of the contract.

For many of the workers hired since 2018, the company agreed to eliminate a lower pay scale, so some workers got even larger raises.

In addition, the company agreed to address complaints that 95,000 of its delivery vans in the US lack air conditioning. In the union’s opinion, it’s more than a comfort issue: it’s a safety issue.