Originally Posted by kovacsr15
Just bought a 2004 Mustang GT 4.6 , automatic , the motor is fully stock except for the cold air intake. I'm thinking of changing my stock gears to 373/410 would I gain anything? Called a few shops and was told that I was wasting my time , Any thought? I m trying to get faster acceleration w/out hesitation. For now it is not a every day driver I have a warranty on the trans/motor Any suggestions?
gears make a HUGE difference. If you want pure acceleration, 410s are the way to go. if you want acceleration and still some cruising rpms on the highway go with 373s. Either way its a crazy difference over stock, i dont know why a shop would tell you that.
You dont gain horsepower by the way, it just adds to your accel..
As far as warranty, the shop would have to prove your gears caused the failure for them to have a case.