auto transmission

Are there any adjustments on the auto box fitted to a JDM 1.5 vxi del sol the engine is the 1.5 vtec but I do not know any info on the trany. It slips in 2nd before engaging when under high power but drives ok once engaged.

Don't know too much about automatics. Could be the clutch (torque converter?) or something with the hydraulics. My advice is take it to a transmission shop or the stealership for a diagnostic.