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Discussion Starter #1
I Have a 5.0 from a 91 mustang and im going to put a t56 tranny in what gears should i get in rear with this new six speed. i currently have the stock 3.08 in. i plan on doing some track events every now and then but nothing super aggresive.
 

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if it's a stock 5.0 then at least 3.55.
 

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Here we go again :)

Take a look at where you'll be doing most of your driving and cruising in 6th gear. If you'll be on the highway at 75-80 mph, or if you'll be on the back roads, at 55-60mph. Choose the gear that puts you at about 2,000 rpm's at that crusing speed. The first 5 gears will sort themselves out appropriatly.
 

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3.55:1 seems to be the popular choice. I have a 3.08 now, but may boost the "wow" factor a bit with a 355 later on. Others have gone with 373's and have gone back to the 355's.
Good luck and have fun, Sten
 

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I would echo the at least 3.55 comment.

Bruce
 

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Unles your car is an IRS car you will have geometry problems with your driveshaft angles because the six speed box is longer, which makes the driveshaft shorter. Check with tech at FFR to be sure. If it works in your car you can use a higher (numerically) gear like a 3:55 or 3:73 because you have the overdrive gears (5th and 6th unless you unstall different gears for 5th) in the tranny which will drop the RPMs down when cruising the highway. Try to have your final highway cruising RPM near where the cam you choose has some power or you will be shifting just to pass someone.
 

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I have to agree with Bob & Bob. To properly answer this question for you or anyone else we can't just throw a blanket over it and say "3.55" or "3.73" or whatever without knowing the engine specs and transmission ratios. What is first? Fifth (or sixth)? The answer will likely be different for a 3.35 first .68 high gear combination than it will for 2.95/.86. So, what have you got?

Jeff
 

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Discussion Starter #9
3.36, 2.07, 1.35, 1.00, .80, .62
are the gear ratios for the t56

and the 5.0 is putting out about 358 horsepower 360ftlb of torque
 

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3.36, 2.07, 1.35, 1.00, .80, .62
are the gear ratios for the t56

and the 5.0 is putting out about 358 horsepower 360ftlb of torque
3.27. With an overall reduction of 10.98:1 first will still be fairly short (but fun!), second will be the "money gear":mf_w00t1:, fifth will make a nice highway gear and sixth will be for loafing at 70+.

Listen to Bob (bbk347) re: fit of a T-56. It probably won't play well with a straight axle.

Cheers,
Jeff
 
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