trans ?

[4.6boy]

can a overfilled autotrans casue bad gas miles?

 

[NO BRAKES]

it can make the trans go bad... so... im guessing that bad would=bad mileage.

 

[ran260gt]

Not good to overfill , remove the top line going into your radiator (its your return line) put a hose over the disconnected trans line fitting comming out of the radiator (your hose will be hooked up to your radiator ,just to be clear) , run it to a bucket , turn your car on for about 5-10 sec and run some fluid out , shut your car off , reconnect your line , start your car , check level and refill as needed !