3.73s or 4.10s - Mustang Evolution

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Old 05-12-2014, 03:33 PM   #1
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3.73s or 4.10s

I don't what gears I already have on my 91' when I bought it the guy said it needed 3.73s but I was also reading up on 4.10s I'm jus curious which would be best for me. I wish i knew his whole set up but I'm trying to change it to my liking. It's my daily driver but I only take it to work which is literally 4 min away so mpg isn't a worry.
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Old 05-12-2014, 04:01 PM   #2
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Auto or stick?
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Old 05-12-2014, 04:49 PM   #3
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Stick. 5 spd
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Old 05-12-2014, 04:51 PM   #4
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I know 4.10s are better for autos but was wondering how it would do if it were on a manual, or would 3.73s give me my all around satisfaction
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Old 05-12-2014, 05:01 PM   #5
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You gonna hit the track some?
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Old 05-12-2014, 05:04 PM   #6
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How big are your tires out back?
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Old 05-12-2014, 05:33 PM   #7
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Yea I plan to start hitting the track next spring. Tires are 275/40R17 98 W
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Old 05-12-2014, 05:52 PM   #8
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Those tires ere pretty good size, I mean with such a small commute and track days those 4.10s would be pretty crazy. But to save a little on gas and tire life I would go with 3.73.
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Old 05-13-2014, 07:41 AM   #9
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I have a 3:73 and i dont really like it ! The gears r to short i should have put a 3:55 or 3:42 evetully i will but is it just me ! But also i dont 1/4 mile !
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Old 05-13-2014, 07:41 AM   #10
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4.10

don't fear the gear
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Old 05-13-2014, 07:44 AM   #11
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Ur right ! I just dont like shifthing gear like my kenworth !
Haha
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Old 05-13-2014, 07:45 AM   #12
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I didn't find my 4.10 too short at all. I regretted not doing 4.30s
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Old 05-13-2014, 07:50 AM   #13
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Well not to me ! But its different for everybody , hopefully my new tranny got higher gears that should be help !
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Old 05-13-2014, 08:29 AM   #14
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I've got both. The 3.73s in my V6 are just about perfect. My GT 5.0 has the 4.10s and they are too much even though it's an auto. 1st gear is almost useless. I wish I would have tried someone else's first. I would have gone with 3.55s. I'll probably be switching soon. Mileage is not an issue, it's just the constant high revs.
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Old 05-13-2014, 10:27 AM   #15
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Well not to me ! But its different for everybody , hopefully my new tranny got higher gears that should be help !
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Old 05-13-2014, 10:28 AM   #16
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U bet on that ! Same to me !
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Old 05-13-2014, 10:37 AM   #17
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Quote:
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U bet on that ! Same to me !
OP, use the quote button so that others know to whom you are replying.
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Old 05-13-2014, 10:42 AM   #18
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OP, use the quote button so that others know to whom you are replying.

Tks ! Did not know !
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Old 05-13-2014, 11:28 AM   #19
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I put 4:10s in last year and they seem perfect with my t56
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Old 05-13-2014, 12:19 PM   #20
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I got a t45 I am biulding a 8.8 rearend and was gonna be doin some runs at the trAck should I get the 4-10 gears or no
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Old 05-13-2014, 12:21 PM   #21
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5speed stick if u got a stang what's the point if u can't shift through them gears right
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Old 05-13-2014, 01:55 PM   #22
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Such a hard decision lol
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Old 05-13-2014, 02:39 PM   #23
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3.55's.

You have a torquey engine that stops making power up top (unless you have heads/cam). Give the engine time to use it's power.
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Old 05-13-2014, 02:40 PM   #24
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3.55's.

You have a torquey engine that stops making power up top (unless you have heads/cam). Give the engine time to use it's power.
3rd gear is ridiculously long and does not land in the fat band on a manual 3V with 3.55
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Old 05-13-2014, 02:48 PM   #25
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This is an old pushrod 5.0.

Going to 3.55, the speed difference between the first 4 gears would be around 30 mph per gear at redline. So first would do a little over 30, second around 60, 3rd around 90, 4th around 120.

I wouldn't call that tall or long gearing.
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Old 05-13-2014, 02:52 PM   #26
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This is an old pushrod 5.0.

Going to 3.55, the speed difference between the first 4 gears would be around 30 mph per gear at redline. So first would do a little over 30, second around 60, 3rd around 90, 4th around 120.

I wouldn't call that tall or long gearing.
That is exactly what I was getting with my 4.10s hehe
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Old 05-13-2014, 03:17 PM   #27
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4.10's....4.10's.....


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Old 05-13-2014, 03:23 PM   #28
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I personally have 4.10s, but in this case i'd have to agree with Ish, if its a mostly stock 5.0 pushrod then the 4.10s would bring it up into the rpms quick, but all the power is lower so you will essentially bring yourself out of your own power band.
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Old 05-13-2014, 04:31 PM   #29
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Just build around the gears. Throw the supporting mods at is as you go. In the meantime have fun with them around town.

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Old 05-13-2014, 05:21 PM   #30
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I just get my new tranny t5z , it will be better i think because the first gear is 2:95 vs 3:35 and seconde gear is 1:94 vs 1.99 ! So hopefully will make a tiny difference ! I can wait to try it next week ! But my 5.0 is pretty much stock . Now when i will do top end and aluminum heads then maybe i will love that 3:73 because of the higher rpm ! Will see
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Old 05-13-2014, 07:31 PM   #31
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Ok so my setup is e303 cams,gt40p heads, gt40 intake, 4 barrel 650cfm Holley carb,msd ignition, so I'm definitely thinking the 3.73 gears
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Old 05-13-2014, 07:36 PM   #32
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Ok so my setup is e303 cams,gt40p heads, gt40 intake, 4 barrel 650cfm Holley carb,msd ignition, so I'm definitely thinking the 3.73 gears
3.55, 3.73 max
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Old 05-14-2014, 01:14 AM   #33
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I'm hittin those speeds with 373 gears I want 4.10
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Old 05-14-2014, 11:14 AM   #34
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Idk what gears I have now but I can do 72 in second and 117 in 3rd didn't want to see what 4th would do. Front end gets kinda light at those speeds I have a tremec 3550 series 5 speed that I put in over summer an was going to go with 3.73. Everyone I talked to says it's the best all around gear
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Old 05-14-2014, 10:32 PM   #35
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4.10s. If you are going steep just go all the way. People worry to damn much about highway RPMs with 4.10s. Its like a 200 rpm difference at most and with the .68 final drive in the T-5 you'll still be at 2400rpm or so doing 70mph.

Hell, I want to toss the 3.08s I have sitting in my garage into my 98 whenever I finally get the blower on it. I hate having to shift 2 seconds after I floor it in 1st.
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