changing gears to 3.73's good or bad

[lx85stang]

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

 

[Mark89coupe]

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]

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

 

[70lightning]

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

 

[Scorcher2005]

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

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]

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.

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]

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

 

[Moffa]

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

 

[90_Red_LX]

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.

 

[Mark89coupe]

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

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

 

[Mark89coupe]

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

 

[brian15]

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

 

[Nutzy19]

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]

excellent choice

 

[I_AM_CANADIAN]

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