03 GT with 5spd, CAI, 73mm BBK throttle intake, cat back and lmr’s staggered 17” bullitts. Drive car regularly and frequently on the highway. Looking to get new gears and trying to decide between 373 and 410? Obviously looking to go faster around town but it does spend some time on the highway. Haven’t tuned yet cause I’m waiting until after the gears. Suggestions?
373 versus 410
- Thread starter Stango21803
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08GT500
5 Year Member
Hi,
You didn’t mention tire aspect ratio. The mechanical advantage you’ll have is worth going to 4.10’s, vs 373’s.
If you’re running 275/45/17” tires & rims with 5th gear’s Ratio being 0.68, at 80 MPH in 5th, running 3.73’s. motor’s RPM’s will be 2550. 2803RPM’s running 4.10’a in 5th, same setup.
Guess it’s how often you’re on the highway, vs lower speeds, continually..
Handy gear/speed Mustang chart from CJPP:
Good luck! Looks like a 3.73 app to me, but that’s your call
-John
You didn’t mention tire aspect ratio. The mechanical advantage you’ll have is worth going to 4.10’s, vs 373’s.
If you’re running 275/45/17” tires & rims with 5th gear’s Ratio being 0.68, at 80 MPH in 5th, running 3.73’s. motor’s RPM’s will be 2550. 2803RPM’s running 4.10’a in 5th, same setup.
Guess it’s how often you’re on the highway, vs lower speeds, continually..
Handy gear/speed Mustang chart from CJPP:
Good luck! Looks like a 3.73 app to me, but that’s your call
-John
wmburns
SN Certified Technician
DarthStang2003
Member
I have a very similar setup but with an auto, I plan on putting 3.73s purely because I drive about 40 highway miles a day! I’m saving the 4.10s for my fox body that is not a daily driver.
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