Gear suggestions please

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12-01-2009, 09:49 AM

#21

mapitts

3rd Gear Member

Join Date: Nov 2009

Location: Decatur AL

Posts: 823

I am not exactly sure where I saw it, but you can and will find that a factory Mustang with a 3.55 rear and a 3.31 rear come with different transmission gear ratios. If you do the math, the 3.55 will launch quicker, but after that,the final ratio's are pretty close to the same. That is with both cars from the factory. I have a friend with a '07 CS GT w/ 3.55's and I havwe an '09 with a CAI and an SCT 93 octane tune with 3.31's. He does launch faster than me, but after that he cannot pull away from me. Mine will do 60 in 2nd, no problem.

12-03-2009, 08:54 AM

#22

Mr.Ski

2nd Gear Member

Join Date: Aug 2009

Location: Somewhere in southern Indiana

Posts: 178

Just remember that the rim sizes has nothing to do with this, it is the overall height of the rim/tire combo height that makes a difference. For example, we could have an 18 and 20 inch rim/tire combo that are both 30 inches tall because of the different sidewall heights of the tires. Just some food for thought.

12-03-2009, 09:19 AM

#23

Daniel60

5th Gear Member

Join Date: Dec 2004

Location: Small walk way by big walk way

Posts: 4,717

Quote:

Originally Posted by cummins cowboy

my car is a stock '07 those saying go to 3.31's are crazy, IMO this is flat out the wrong gear for the car in any situation, to me it requires too much slipping of the clutch from a start like getting the car in and out of the garage, it also means your not shifting into 5th ever until you are on the highway doing at least 70. it also does not allow the car to be in the rpm's it needs to be if you wanna get on a whindy road and do some aggressive driving.

3.73 is really what these cars should have come with, I am very happy with mine and they really wake up the car, first gear is plenty usable and feels as it should. the clutch isn't slipped near as much leaving a stop light.

Yes I have to agree that the 3.31 gear is not a mustang gear. She should at least come with a 3.55.