If you had engine oil in transmission or vice versa, that could spell trouble. If transmission fluid is leaking, the fluid level could be low causing the lack of power but then under such circumstances, the engine would race (sounds loud with tachometer shooting up) and you have lack of accelerating pace.
If the engine oil is overfilled too much, it would result in loss of power and you might get a lot of smoke from the exhaust.
If the Malfunction Indicator Light is showing, you need to retrieve the trouble codes and let us know the EXACT code, it might tell us what is wrong.
Was problem there before oil and fluid replacement?
Wednesday, October 31st, 2012 AT 8:17 PM