Rear Gear Change Options On 2004 Mustang 5 Speed GT - Ford Mustang Forum
 
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post #1 of 13 (permalink) Old 09-09-2007 Thread Starter
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Rear Gear Change Options On 2004 Mustang 5 Speed GT

Considering swapping the stock 327 to possibly 373 wondering whether worhwhile or just gas guzzler on the highway. Got plenty of pep now with k and n filter and chip installed.
Any suggestions?
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post #2 of 13 (permalink) Old 09-09-2007
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really just depends on what your looking for out of your car. I dont care about the mileage so I went with 4:10 gears. still getting 19 mpg around town

03 Mach 1, Full eaton swap,4;10s, slp 2 with mac H pipe, 443 rwhp tuned by Excessive

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post #3 of 13 (permalink) Old 09-10-2007
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Quote:
Originally Posted by Blackjack View Post
Considering swapping the stock 327 to possibly 373 wondering whether worhwhile or just gas guzzler on the highway. Got plenty of pep now with k and n filter and chip installed.
Any suggestions?
No less than 4.10s, you will not be sorry.
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post #4 of 13 (permalink) Old 09-10-2007
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Quote:
Originally Posted by JDGt281 View Post
No less than 4.10s, you will not be sorry.
I am going to go the opposite way, I say no more then 3.73's. Unless you are wanting quicker time at the track and going to have some good tires/suspension.

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New forged internals w/cobra crank, TEA CNC ported heads w/ comp cams XE270AH, AccuFab throttlebody and plenum, Spec III clutch, TKO 600 trans, aluminum drive shaft, 3:73 gears, BBK long tube headers, 255lpm intank fuel pump, Dyno tuned, Polished Procharger D-1sc 12psi, 3 core intercooler. SVO hood and 18in Budnik wheels w/toyo tires. Caster/Camber plates BBK lowering springs. Car web page
Comp cams XE262AH,T-45 with tri-ax shifter for sale
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post #5 of 13 (permalink) Old 09-10-2007
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if I would of went 3:73 instead of 4:10 I would have been kicking myself in the a$$. 4:10 are really not as drastic as you would think. if your driving 75 on the highway everyday then you might not want them. but for the most part I think they are a good all purpose gear. just my two cents

03 Mach 1, Full eaton swap,4;10s, slp 2 with mac H pipe, 443 rwhp tuned by Excessive

1990 lx fully built 331 stroker

89 LX lots of goodies
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post #6 of 13 (permalink) Old 09-10-2007
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4.10's hands down.
post #7 of 13 (permalink) Old 09-11-2007
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I know I would hate my car with 4.10's because I don't like it a lot of times with 3.73's.

1998 GT Saleen replica
New forged internals w/cobra crank, TEA CNC ported heads w/ comp cams XE270AH, AccuFab throttlebody and plenum, Spec III clutch, TKO 600 trans, aluminum drive shaft, 3:73 gears, BBK long tube headers, 255lpm intank fuel pump, Dyno tuned, Polished Procharger D-1sc 12psi, 3 core intercooler. SVO hood and 18in Budnik wheels w/toyo tires. Caster/Camber plates BBK lowering springs. Car web page
Comp cams XE262AH,T-45 with tri-ax shifter for sale
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post #8 of 13 (permalink) Old 09-11-2007
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Quote:
Originally Posted by blueoval View Post
I know I would hate my car with 4.10's because I don't like it a lot of times with 3.73's.
I dont understand 3:73's are not much of a change from stock. around town I dont know how you would tell the differance from stock ?

03 Mach 1, Full eaton swap,4;10s, slp 2 with mac H pipe, 443 rwhp tuned by Excessive

1990 lx fully built 331 stroker

89 LX lots of goodies
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post #9 of 13 (permalink) Old 09-11-2007
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I dont want to be shifting more then I am now. First is almost pointless already "I mean how quick I have to shift not spinning" 2nd is not much better, I like 3rd and 4th, but I feel I wouldn't even like 3rd with 4.10's. Everyone likes the low gear becuase it makes first and second pull harder, but you are shifting at lower speeds, the only reason I would ever go with a lower gear is if my car would pull itself good off the line with slicks or if my car wasn't getting near redline at the track in my last gear change.

1998 GT Saleen replica
New forged internals w/cobra crank, TEA CNC ported heads w/ comp cams XE270AH, AccuFab throttlebody and plenum, Spec III clutch, TKO 600 trans, aluminum drive shaft, 3:73 gears, BBK long tube headers, 255lpm intank fuel pump, Dyno tuned, Polished Procharger D-1sc 12psi, 3 core intercooler. SVO hood and 18in Budnik wheels w/toyo tires. Caster/Camber plates BBK lowering springs. Car web page
Comp cams XE262AH,T-45 with tri-ax shifter for sale
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welcome to the site...my opinion 373s are a perfect gear if your planning on "modding" your car in the future and trust me you will see a differance from stock

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Yeah you will see a differance but from 3:27 to 3:73 seems like a waste of time and money just my opinion. it really depends on what he is looking for and what his future plans are with the car. another thing to consider is what tire size you plan on running. that will affect your gearing as well

03 Mach 1, Full eaton swap,4;10s, slp 2 with mac H pipe, 443 rwhp tuned by Excessive

1990 lx fully built 331 stroker

89 LX lots of goodies

Last edited by johnr2001; 09-11-2007 at 03:02 PM. Reason: add on
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I love my 3.73's but then again I started from a 2.73! 3.73 is a good all around gear, good power low and won't kill you on the highway!

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I have 3.73 with some boult ons and Im thinking bout 4.10 but my car will some day lol have it modded with a big turbo on it what should I do in the mean time
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