automatic transmissions usually come with initial high gear ratio (2:1),resulting,
poor hill climbing capability
poor towing capability
4L / Low gear in jeeps is provided to cater these issues
where as in case of manual transmissions initial (1st gear) gear ratio is around (4:1),
which gives almost double torque when required in 1st gear as compared to same engine coupled with auto transmission...
weight of corolla is around 1000 kg,
smaller cars weight vary from 800 kg to 1000 kg