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-   -   Thoughts on 3.73 gears..? (https://themustangsource.com/forums/f800/thoughts-3-73-gears-522190/)

am5.oh Jun 1, 2013 10:55 AM

Thoughts on 3.73 gears..?
 
I'm debating if I should install some 3.73 gears, but I would first like to see your thoughts and opinions.
I currently have stock 3.31s.

My current mods:
C&L intake
Boss Manifold
JBA long tubes
JBA H-Pipe w high flow cats
GT500 AB
SCT tuned by Bob Kurgen

423 hp 380 tq

Glenn Jun 1, 2013 11:18 AM

no get 411's .... no get 355's no wait go ahead get the 373's or get the 411's but 373's would be ok

Ltngdrvr Jun 1, 2013 11:50 AM

What do you want out of the gear change?

My car came with 3.73's and I think 3.55 would have been good enough.

ricksGT/CS Jun 1, 2013 12:10 PM

3.31's ,,gas saver / highway gears
3.55's ,,quick
3.73's ,,alittle quicker
4.11's ,,OMG fast ,,but bad on gas for daily driving .
I still have the 3.31's in my 2007 ,but I like them for the top end speed and
good gas mileage ,nice highway trip driving .

Brandon302 Jun 1, 2013 12:19 PM


Originally Posted by Ltngdrvr (Post 6633678)
What do you want out of the gear change?

My car came with 3.73's and I think 3.55 would have been good enough.

+1, what you want to do will affect your choice.

am5.oh Jun 1, 2013 01:13 PM


Originally Posted by Brandon302 (Post 6633687)

+1, what you want to do will affect your choice.

I want to pull off the line a little quicker. Mine seems a tad bit sluggish on low rpms. How do you like them, how's your gas mileage and top end? I'm currently getting 20 mpg as a daily driver with a heavy foot here and there.

am5.oh Jun 1, 2013 01:16 PM


Originally Posted by ricksGT/CS (Post 6633681)
3.31's ,,gas saver / highway gears
3.55's ,,quick
3.73's ,,alittle quicker
4.11's ,,OMG fast ,,but bad on gas for daily driving .
I still have the 3.31's in my 2007 ,but I like them for the top end speed and
good gas mileage ,nice highway trip driving .

Yea I'm really liking my gas mileage right now and top end speed! I want it to feel a little more torquey tho...

am5.oh Jun 1, 2013 01:16 PM


Originally Posted by Glenn (Post 6633668)
no get 411's .... no get 355's no wait go ahead get the 373's or get the 411's but 373's would be ok

Lol..

Brandon302 Jun 1, 2013 01:24 PM


Originally Posted by am5.oh (Post 6633715)
I want to pull off the line a little quicker. Mine seems a tad bit sluggish on low rpms. How do you like them, how's your gas mileage and top end? I'm currently getting 20 mpg as a daily driver with a heavy foot here and there.

18.5 mpg usually around town, that includes quite the heavy foot. However I feel like the car has more then enough power and could maybe use 3.31's.

5LHO Jun 1, 2013 05:20 PM

I love 3.73s, they are a perfect all-round gear for this engine and trans combo. With only the mildest adaptation you can start in whatever of the first 3 gears you feel like. Not that I do that much but, I can, any time.

Car rips at the track too but, 3.73s forced a shift to 5th before the stripe so, I upped the diameter on my slicks to 28 and 4th it is, right below the redline, perfect.

TheDivaDanielle Jun 2, 2013 11:13 AM

3.31's are great on a 5.0.. I don't see the need for 3.73's though.

racksteris Jun 2, 2013 11:37 AM

4.10 all day..If your not doing FI

I love them. BEST upgrade I have done to my car better than a tune..

Gas MPG went from 19.6 to 19.2 with a more aggressive tune

TheDivaDanielle Jun 2, 2013 11:41 AM


Originally Posted by racksteris (Post 6634094)
4.10 all day..If your not doing FI

I love them. BEST upgrade I have done to my car better than a tune..

Gas MPG went from 19.6 to 19.2 with a more aggressive tune

curious what your shift speeds are at 7000 RPM..

racksteris Jun 2, 2013 11:50 AM


Originally Posted by TheDivaDanielle (Post 6634097)
curious what your shift speeds are at 7000 RPM..

I have an auto. depends on how you drive.

3500- 4000 all depends on how much you get on the gas, The car is fast with the gears, FING fun to drive LOL

racksteris Jun 2, 2013 12:02 PM

I just reread your post. shift speed.

I don't know. all I know is the car is soo much more fun to drive,
80 mph = 2600-2700 rpm 60 mph =2000 rpm

Defiant 5.0 Jun 2, 2013 12:58 PM

I have 3.90's, the oddball gear lol.

mikeyt03 Jun 2, 2013 05:35 PM


Originally Posted by TheDivaDanielle (Post 6634090)
3.31's are great on a 5.0.. I don't see the need for 3.73's though.

You won't until you've had them on your 5.0.

TheDivaDanielle Jun 2, 2013 08:06 PM


Originally Posted by mikeyt03 (Post 6634236)
You won't until you've had them on your 5.0.

nope, drove them and found them annoyingly short.

muscledom Jun 2, 2013 08:27 PM

I have 410s. Shoulda got 430s. Different tranny though. Don't fear the gear.

Five Oh Brian Jun 3, 2013 07:56 AM

Don't fear the gear. Gears are, by definition, a torque multiplier and who doesn't love more torque?!?! I went with 4.56's and a 28" tall drag radial so that I can use most of 5th gear in the 1/4 mile before hitting the traps and the car launches so much harder than with the 3.73's. Also, much more entertaining to drive every day!


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