Zacks94Z

Casual discussion with my father about rear gears turned into a heated debate. All i need is for some one to agree with me and prove him wrong. This situation is as follows. A stock automatic LT1 with 4.10s in the rear end WILL get worse gas mileage then a stock 6-speed LT1 with 4.10s. Further more the debate continued as to whether a stock automatic LT1 with 3.23 rear gears would get WORSE gas mileage then a stock 6-speed LT1 (both cars are assumed stock and band new from the factory). Please help me prove him how wrong he his!!

JUSTINSWS6

Your right. A4 with 4.10's will get worse gas milage than a m6 with 4.10's reason is the gearing in the tranny. A4 has only 4 gears which will make it have higher rpms which adds more fuel and gets worse mpgs. Also 4.10's will make you accelerate faster but have less top speed compared to 3.23's.

karpetcm

iTrader: (2)

honestly that debate would not be there if there was some common sense there, but you are right OP

JUSTINSWS6

When you have two people who dont know a lot about cars they will be talking about the flux compasitor giving you x amount of horse power.

Big Al

iTrader: (1)

My flux capacitor is bigger than your flux capacitor

Six speed manual has a .5 to 1 overdrive. So the engine will run slower than the A4 with any rear end ratio. How that equates to MPG is a completely different question, but with 4.10's it a very good bet the six speed will win.

Al 95 Z28

01ssreda4

iTrader: (96)

You're comparing apples to oranges. M6 will always get better gas mileage (all else being equal) because of the 2 overdrives.

shepss217

iTrader: (5)

yup agreed with you, thats why you can upgrade from a 2.73 to a 3.42 with an A4 and it makes a hugh difference cuz the gears are already pretty close in ratio