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What do you mean by the "cluster gear"? Are you talking about all five gear ratios in your t-5 transmission? If you are, putting in "lower" gears (such as 3.55 or 4.10's from the stock 2.73's, will just undo the same problem you attempted to fix by changing gears in the transmission. If you have feel that your rpms are too high at a given speed, first make sure your speedo is correct, then decide what gear it is in... If its only 5th you are worried about for cruising, then you only want to change 5th, if its 1st, then just first or maybe both, but if you lower all of your gears, then you have effectively removed torque from the ground. If you put higher gears ie. your 2.95 first, and then 3.73's in the rear, you are just wasting money, because you are simply putting the same multiplication of torque in different places...
A stock Mustang puts down 2702 lb/ft of torque to the rear wheels (accounting for gear multiplication) 300 lb/ft * 3.30 Nt(tranny gear) * 2.73 Nr(differential gears) = 2702.7 lb/ft @ max torque.
Anyway, my point is this, what you want to do is find a lower 5th gear ratio, and a first gear ratio, then lower your end... This way, you dont sit and spin in 1st, and in 5th you can still drive at low enough rpms to get good gas mileage. I have had the same thoughts, but have had very little luck finding different gear ratios for a t-5, especially a 5th gear lower than .68. I would really like to change the ratio to .50:1, that way, I can keep my current 2.73 gas mileage and still have 3.73 gears, although I am not so sure that it would be worth all the trouble...
Good Luck
What do you mean by the "cluster gear"? Are you talking about all five gear ratios in your t-5 transmission? If you are, putting in "lower" gears (such as 3.55 or 4.10's from the stock 2.73's, will just undo the same problem you attempted to fix by changing gears in the transmission. If you have feel that your rpms are too high at a given speed, first make sure your speedo is correct, then decide what gear it is in... If its only 5th you are worried about for cruising, then you only want to change 5th, if its 1st, then just first or maybe both, but if you lower all of your gears, then you have effectively removed torque from the ground. If you put higher gears ie. your 2.95 first, and then 3.73's in the rear, you are just wasting money, because you are simply putting the same multiplication of torque in different places...
A stock Mustang puts down 2702 lb/ft of torque to the rear wheels (accounting for gear multiplication) 300 lb/ft * 3.30 Nt(tranny gear) * 2.73 Nr(differential gears) = 2702.7 lb/ft @ max torque.
Anyway, my point is this, what you want to do is find a lower 5th gear ratio, and a first gear ratio, then lower your end... This way, you dont sit and spin in 1st, and in 5th you can still drive at low enough rpms to get good gas mileage. I have had the same thoughts, but have had very little luck finding different gear ratios for a t-5, especially a 5th gear lower than .68. I would really like to change the ratio to .50:1, that way, I can keep my current 2.73 gas mileage and still have 3.73 gears, although I am not so sure that it would be worth all the trouble...
Good Luck
