changing gears to 3.73's good or bad

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lx85stang

New Member

Jun 28, 2004

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Apr 10, 2005

#1

• Apr 10, 2005

• #1

i have a c4 auto in my mustang right now with i think 3.06 rear gears the trans is stock except for a b&m shift kit if i changed to 3.73s would it help me any? i will be putting in a t-5 trans in a few months so would that also help me on that any info would be great thanks in advance jj

 

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Mark89coupe

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Apr 5, 2005

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Apr 10, 2005

#2

• Apr 10, 2005

• #2

3.73's with a t-5 are the perfect combo for the street. I cruise on the hwy at 80 and im still under 3000rpms. 3000rpms is around 85mph for me.

 

squeeeg

Founding Member

Jul 4, 2000

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Michigan

Apr 10, 2005

#3

• Apr 10, 2005

• #3

I agree. 3.73's will be the best bet for you situation.

 

70lightning

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Mar 30, 2005

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in the basement makin stuff

Apr 10, 2005

#4

• Apr 10, 2005

• #4

Do you do alot of highway driving? 4.10's or 4.56's if not.

 

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Scorcher2005

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Apr 17, 2004

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South Carolina

Apr 10, 2005

#5

• Apr 10, 2005

• #5

70lightning said:

Do you do alot of highway driving? 4.10's or 4.56's if not.

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did you miss the part about him putting in a t5 soon? Unless you want serious traction issues, stay under 4.10 w/ the t5. If you plan to have 400+ hp, many would agree 3.55s are your best bet.

 

70lightning

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Mar 30, 2005

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in the basement makin stuff

Apr 10, 2005

#6

• Apr 10, 2005

• #6

Scorcher2005 said:

did you miss the part about him putting in a t5 soon? Unless you want serious traction issues, stay under 4.10 w/ the t5. If you plan to have 400+ hp, many would agree 3.55s are your best bet.

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I didn't miss anything, I made my suggestions based on the fact he was going to a T-5, and traction is relative to suspension and tires any how.

 

just4bob50

Active Member

Apr 2, 2005

504

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Pa.

Apr 10, 2005

#7

• Apr 10, 2005

• #7

had 3:55s and put 3:73s in and i love them. i should have gone with 3:90s though.

 

Moffa

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Apr 5, 2005

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Apr 10, 2005

#8

• Apr 10, 2005

• #8

Love my 4.10s, 80 mph is around 2700 for me

 

90_Red_LX

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Sep 29, 2003

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Asheboro, NC

Apr 10, 2005

#9

• Apr 10, 2005

• #9

3.73's, so you have something even remotely resembling top end performance. 4.10s are too steep imo for a stock 302 with a stock t5. 4.6 is better with the steeper gears.

 

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Mark89coupe

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Apr 5, 2005

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Apr 10, 2005

#10

• Apr 10, 2005

• #10

Moffa said:

Love my 4.10s, 80 mph is around 2700 for me

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4.10's. 2700rpms @ 80mph.
Yeah, I can handle that.
I may do that after thr thumper heads.

 

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Mark89coupe

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Apr 5, 2005

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Apr 10, 2005

#11

• Apr 10, 2005

• #11

Has anyone done a before and after 1/4 mile time with a 3.73 to 4.10 gears change?

 

brian15

New Member

Oct 16, 2003

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Apr 10, 2005

#12

• Apr 10, 2005

• #12

sure have it netted me a tenth better with traction problems and worse air but id expect 1-2 tenthos .
Brian

 

Nutzy19

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Mar 30, 2005

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Flemington NJ

Apr 10, 2005

#13

• Apr 10, 2005

• #13

Ive talked to a dozen people about this before . I wanted 3.73's but had a set of 3.55's available to me and from Chris at Crazy Horses mouth he said 3.55's are better for a street driven car and that unless I wanted to have to use overdrive in the traps I better not use 3.73's. I hear too many people on this forum knock
3.55's cause they have 3.73's or 4.10's and can spin their tires at 30 mph....GREAT FOR YOU!!!! I want to use the combination that works not the one that only seems better....Some of us have a use for 3.08's 3.55's 3.73's all the way to 5.14's......its all about the combination thats right for you...

 

Blakthorn

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Jul 24, 2004

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US

Apr 10, 2005

#14

• Apr 10, 2005

• #14

excellent choice

 

I_AM_CANADIAN

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Mar 30, 2005

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B.C.

Apr 10, 2005

#15

• Apr 10, 2005

• #15

would 3.55's be better for a f/i setup?