I just bought a 98 GT automatic im thinking it has either 3.27's or 3.55's no way it has 2.73's...what are you guys taching at in OD on the highway at 70-75 mph...stock size tires...Thanks
Quick question guys with 3.27's/3.55's
- Thread starter MY 85 GT
- Start date
-
Sponsors (?)
Put the rear of the car on jack stands and rotate the tire one time around. If the drive shaft spins 3 1/2 times its 3.55s and if its 3 1/4 its 3.27s. It may have 3.27's stock. I am not sure cause I have never owned an auto mustang in that body style.
patman0911
Founding Member
Since it's got a lockup converter, it shouldn't be too hard to figure out.
O/D = .70 so at 70 MPH:
2.73 = 1750
3.27 = 2100
3.55 = 2300
O/D = .70 so at 70 MPH:
2.73 = 1750
3.27 = 2100
3.55 = 2300
Yeah i can do that but its cold here and wet for all the snow so im being lazy...LOL...just thought if someone had a simluar car and gear ratio that would be close until i open up the rear...
patman0911
Founding Member
No problem 
Pop "gear calculator" into google and a bunch will turn up, some of them Mustang specific with common info already filled in. If you can't find the exact transmission gear ratio you need, like 0.70 for a 4R70W, just select anything that's 1:1 (like 4th gear in most manuals) and then multiply the result by the ratio you need.
Pop "gear calculator" into google and a bunch will turn up, some of them Mustang specific with common info already filled in. If you can't find the exact transmission gear ratio you need, like 0.70 for a 4R70W, just select anything that's 1:1 (like 4th gear in most manuals) and then multiply the result by the ratio you need.Similar threads
