gears
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1987stangman
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- Jul 12, 2006
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Yep, thats the ticket. I went with 3:55's with a stock motor and it was OK but when I added my new combo it really worked well together. Gears are great but it is better when you build your car around them. Just my O2!
There will be debate on this, but I'm throwing in for 3.73s. 4.10s might be good for the dragstrip, but cruising RPMs on the highway are gonna be ugly, and 1st gear is shooooort.
I like the 3.73 i had in an 85 but now i have a 4.10 and its also fun but you have to decide if your goin to go on the highway. With my 4,10 its at 2000 rpm at about 45mph in 5th and im shiftin fast im only in a gear for a few seconds just crusin around
blackened88lx
Active Member
It really depends on your combo and how you use your car like Grn92 said. Most people could have fun on the street with 3.55s or 3.73s just messin around with street tires. My car has 3.55s and with drag radials and they're wayyy too tall. It would really like some 4.10s.
bubba-dough
Active Member
Yep its all about your combo when it comes to racing and how you plan on driving the car. Imo though 3.73 is the better all around choice for fun and performance on a stock or mild bolt on.
tim281
New Member
I am struggling with the same question. I had 3.73s on my 96 Cobra and they worked out really well, but that was a DOHC motor and probably not as torquey at the low end. The 96 came stock with 3.27 gears and the jump in gearing was roughly 0.5....it made a big difference.
Since the Notch has a 3.08, I am leaning toward the 3.55s (roughly a 0.5 difference also). The Notch is a lot lighter so the 3.55 change should be pretty noticable. I wouldn't go higher than the 3.73, but I can't speak from experience with higher gearing. I am looking for a gear that will be fun for the street. My main goal is to build the notch into a fun to drive car with plenty of usable torque at the low end.
Since the Notch has a 3.08, I am leaning toward the 3.55s (roughly a 0.5 difference also). The Notch is a lot lighter so the 3.55 change should be pretty noticable. I wouldn't go higher than the 3.73, but I can't speak from experience with higher gearing. I am looking for a gear that will be fun for the street. My main goal is to build the notch into a fun to drive car with plenty of usable torque at the low end.
parrish5o
New Member
Yeah, it depends on your combo. I like 3.73s myself. The 4.10s are pretty low for the street but tolerable.
I don't want to hi-jack this thread, but my question is virtually the same. I'm trying to decide between 3.55's and the stock 3.27's?? Here's the thing, my Mustang is going to be a daily driver, mild mod, bolt-on car. The problem is, I live in rural Colorado. If I want to go to friggin' Arby's, I have to drive 200 miles round trip.
What RPM can I expect with the 3.55's at 75mph? I'm not as worried about mpg (not that it isn't a concern), as I am the increased RPM resulting in increased heat/wear on longer trips... In the past, I've actually increased MPG, but lowering my gearing (raising it numerically) due to the fact it was running in a better RPM range in terms of effeciency. Obviously its not always the best to run at lower RPM's simply for the sake of running lower RPM.
What RPM can I expect with the 3.55's at 75mph? I'm not as worried about mpg (not that it isn't a concern), as I am the increased RPM resulting in increased heat/wear on longer trips... In the past, I've actually increased MPG, but lowering my gearing (raising it numerically) due to the fact it was running in a better RPM range in terms of effeciency. Obviously its not always the best to run at lower RPM's simply for the sake of running lower RPM.
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