I've been accumulating parts for months, and I'm finally about ready to swap a magnum XL into my 05 GT. I've already decided on the close ratio 2.66 1st gear model. I currently have 4.10 rear gears. I'm debating which overdrive gears to go with and looking for some second opinions.
Option A: 0.74 5th gear and 0.50 6th gear. 65 MPH would be around 1650 RPM in 6th gear.
Option B: 0.80 5th gear and 0.63 6th gear. 65 MPH would be around 2075 RPM in 6th gear.
Option A would be nice for highway cruising but probably a little sluggish. Option B would be a little more responsive but a little worse on gas mileage. Option B 6th gear is very close to my current tremec 3650 5th gear. I'm not concerned at all with top speed - both would be capable of well over 200 MPH which is way too fast for my blood. The car is primarily a street car that's only driven on the weekends. It makes an occasional trip to the drag strip. Just curious which option you would choose if you were in my shoes.
Option A: 0.74 5th gear and 0.50 6th gear. 65 MPH would be around 1650 RPM in 6th gear.
Option B: 0.80 5th gear and 0.63 6th gear. 65 MPH would be around 2075 RPM in 6th gear.
Option A would be nice for highway cruising but probably a little sluggish. Option B would be a little more responsive but a little worse on gas mileage. Option B 6th gear is very close to my current tremec 3650 5th gear. I'm not concerned at all with top speed - both would be capable of well over 200 MPH which is way too fast for my blood. The car is primarily a street car that's only driven on the weekends. It makes an occasional trip to the drag strip. Just curious which option you would choose if you were in my shoes.