My friend and I just recently did two drain and fills on my 2010 Honda CR-V LX 4wd 2.4 liter. The car drove as well as it normally did for a couple days. After a couple days have passed, I was driving up a fairly steep hill and I noticed that the car was making a deep growling sound and my foot on the gas pedal was vibrating pretty severely while going up the hill. I believe there might have been some power loss but very minimal if so. I also noticed that when I was coming to a stop, when my CRV would shift down a gear, it would slightly jolt me forward because of a sudden deceleration which I did not notice before the fluid swap.

When I drive lightly on the throttle, I do not notice any growl or vibration whatsoever. It appears that when I push the throttle down past 40-50%, the deep growling and vibration gets progressively worse very quickly. It almost sounds as though its a very large exhaust leak with how loud it is but this only occurs when the throttle is pressed beyond 40-50%.

I have about 90,000 miles on my CRV and I did one drain and fill before at about 60,000 miles when the vehicle was 7 years old. In both instances, I changed the in-line transmission fluid filter and I constantly checked to make sure that the fluid level on the dip stick was within normal range. From what I been reading, it might be a torque converter issue but I am unsure. I wanted to have some idea before I brought it to the dealership as to what common issues are with the CRV so its less likely that I get oversold something I don't need.

Any help would be greatly appreciated. Thank you.