While "dived in the pool" and "dove in the pool" are now both considered correct, more interestingly, "drived the car" is not correct.
Verbs come in 3 main classes in English - strong, weak, and irregular. Strong verbs form their past tense by changing the vowel, e.g. drive/drove, sink/sank, run/ran. Weak verbs change the ending, usually adding -ed, dive/dived, walk/walked. Irregular verbs do a bit of both, buy/bought, seek/sought.
Dive seems to have been generalized into both a strong and a weak verb which m-w.com suggests is due to its similarity to drive.
Reply from Russ Cable (Dallas, TX - U.S.A.)