Staff at the firm has been voting on proposals to cut their hours and freeze pay in exchange for the guarantee of no compulsory redundancies for two years.
Under the deal, workers would work a four-day week, with hours cut from 35 hours to 32. They would also give up bonuses and have their pay frozen until October 2010.
The proposals have been hammered out between the unions and Jaguar Land Rover bosses.
Some workers voted on Monday on the proposals - others were voting on Tuesday, Feb 24 - and the result is due to be announced on Thursday, Feb 26.
Union bosses told Sky News they are confident staff will back the deal.
JLR is based in Gaydon, Warwickshire, and employs about 15,000 people in Castle Bromwich, Coventry, Solihull, and Halewood in Merseyside.
Jaguar cut 450 jobs in January and like other carmakers has held production suspensions.