hi. i cant understant where is the problem. when i put it in D and start drivind it feels unpleasant kick when gearbox shifts from 1st gear to second. i recently had gearbox repaired because all gears were gone. now its ok everything is new and changed in it but kicks remain. made a diagnostic on it, there are no errors. shifting to other gears are ok and just like cant feel them. oil level ok. where could be the problem? Maybe the problem is in rear differential? thank you for suggestions and answers.