OK i'll jump in here, with a contrary view.
Here is a comparison from the CAR warranty side. If you go to most car dealers 2 days or 2 miles after the 3 yr/36,000 mile warranty you are SOL! Have a friend with a Honda Odyessy, the transmission died at 38,000 w/in 3 years, no extended warranty, Honda dealer and factory told him - If you had bought an extended warranty we'd fix it, otherwise sorry you are on you own! Warranty terms are warranty terms. He had to pay $2,500 out of pocket.
I'll NOT stand up for Tracker on folks who had valid issues w/in warranty, but Ron has identified 6 months OUT of warranty a problem and I doubt most companies would honor that. I HOPE Tracker does, but contractualy it's NOT valid.
Me, whether it's a house, car, boat, electronic... 1 month before the factory (or Extended) warranty ends I go over the vehicle (or item) top to bottom, have the dealer (in a car/boat) do a thorough check for any possible warranty issue and make sure they are documented in writting.
Ron - I'd talk to the dealer you bought it from, see if anyone can verify that this problem occured during warranty and then with your dealer politely and professionaly go back to Tracker and ASK if they could cover any repairs.
Let us know how it goes.