Lexus Repair: transmission, lexus ls 400, hello art

Question
when im driving my lexus ls 400 and apply the brakes the car
downshifts by its self,it shifts out of overdrive

Answer
Hello Art,
 I would inspect the motor mounts and transmission mount. Also it wouldn't hurt to have a transmission shop take a look at your vehicle.
JP IMPORTZ
DALLAS/PLANO/RICHARDSON INDEPENDENT LEXUS AND TOYOTA
REPAIR, SERVICE AND PERFORMANCE
WWW.JPIMPORTZ.ORG