I've noticed almost everybody recommends 4.10s for manual S197s and 3.73s for autos....why? is it a driveability issue or just for the sake of fuel milage? 4.10s gives harder acceleration and before someone says (oh what about the top end?) I say with 4.10s you can stillreach about 155m/h at 6000rpms in 5th gear! isn't that enough for a Stang?

 

I'm going with 4.10's in my auto....

 

The reason why people recommend different gears taller gears for the auto is due to the auto having a shorter OD 5th gear.71 vs the .62 OD5th gear of the manual. Plus with the exception of 1st gear the rest of the gears in the auto areshorter than themanual.But you could certainly run 4.10s in an auto. I have no problems reaching 140 with my 4.10s and plenty of power left, I just start punking out.

And no 155 isn't enough for a stang[8D]

 

I thought 5th gear in autos is 0.75 and 0.70 in manuals? that 0.62 is for pre-2004 manual trans?

BTW what I meant by 155m/h being enough or not is the aerodynamocs of the car and it's overall suspension and chassis design, you need some serious suspension if you wanna go over 155, plus...are you really gonna go over 155? why and where? I don't see the point...

 

I'm certain 5th in theT-3650 is .62. The auto which I'm not sure ofexact model of the 5R55 in the stang, but it's either .71 or .75 depending on the model whether it an N, S(.71), or W model.

 

Timmay, check the update in my previous post!

 

Timmay is correct about the gears...we have the 5r55s in the mustang. This makes the 3.73 a better "match" for a dd auto. 4.10's will work just fine in fact I do believe I've read about 4.30's in an auto before. Not real sure why but I dont think the 3.55 option was or is available from the factory on the auto.

I think that with the 4.10's though you may run through your power band too soon though which would have effect your 1/4 mile times as I understand it anyways....

 

3.73 in my auto, works like a dream... i was told that i would just end up breaking 4.10's if i put that in my auto. is this true that you risk a higher chance of breaking gear ratios in the auto with 4.10 than 3.73?

 

More likely your transI would think butI guessit's possible....I had never heard of that till now.

 

I agree the front end is basically a brick and the stock tires, brakesand suspensionare crap for high speed.The car itself is certainly stable and solidenough forautobahn speeds.It's fun to just stomp on it and let it fly every now and then.If I get an assignment back to Italy or Germany I certainly plan to do so. Yes itis dangerous especially in the city but when you find open country roads where your the only person at risk,you gotta live a little.They didn't make this car just to do 65 and be happy.