From...https://www.celicahobby.com/ubbthreads/showflat.php?Number=1869771173#Post1869771671 Manual Transaxle:
1ZZ-FE engine: 1.9L
2ZZ-GE engine: 2.3L
Oil Type: Gear oil API GL-4 or GL-5
Recommended oil viscosity: SAE 75W-90 Automatic Transaxle:
1ZZ-FE engine: Up to 2.9L
2ZZ-GE engine: Up to 4.0L
Automatic Transmission fluid 'Type T-IV'
Change Automatic Transmission fluid only as necessary
When changing the Automatic Transmission fluid, use only Toyota Genuine AFT Type T-IV (ATF JWS3309 or NWS6500) to aid in assuring optimum transaxle performance.
[b]Notice: Using Automatic Transmission fluid other than Toyota Genuine AFT Type T-IV may cause deterioration in shift quality, locking up of your transmission accompanied by vibration, and ultimately damage the automatic transmission of your Celica.