You can try to do the following, uncheck the box in the options that says you want to play with the classic hotkeys, that way you will have reverse on R instead of U which makes all the difference. Countless times I thought I was telling my tanks to back up and I was mistakenly hitting Y or I.
Always have spotter units for your Jackson, either infantry or M20 utility vehicle, Stuart or even M8. Stuarts are nice because they have their stun ability and point blank engine shot but it's dependent on your teching choice. Alternatively you can also place an AT-gun behind your Jackson so that when they push you aggressively with the Panther you can reverse your Jackson out of there and if he gives chase he will drive right into your AT-guns field of fire.
Also, if you are able to close the distance with a couple of riflemen squads and throw the AT-grenade on it, the panther is basically dead in the water once its engine is broken.
