I will have to try that if it does not run to good at the track. I think it is going to run alot better than it did. I have never changed out the diff fluids and my rc cars before so this was my first time and only did it because I had to replace my ring gear on my front diff so I did all 3. Boy I tell you your arm gets a working unscrewing and screwing the truck back together. Just seems like alot of work for some fine tuning. I never thought it could make that much of a difference.