AOD 3:55's VS 4:10's?

LilBerx · Jan 18, 2012

I have a chance to swoop up on a rear axle with 4:10 gears in it.. i am currently running 3:55's in my 92 5.0 with an AOD transmission... I am pretty sure 4:10's will wake my car up, but what kind of rpms am i looking at freeway driving? around 65-70 MPH.
At around 65 right now i am around 1800 RPM

1991notchbackLX · Jan 18, 2012

LilBerx said:
I have a chance to swoop up on a rear axle

Must be Utah vernacular.

The 4.10 gear set is the typical recommendation for AOD cars. You're going to sacrifice fuel economy and some cruising RPM, though. Expect to see 2200-2500 RPM at highway speed.

Jason 302 · Jan 18, 2012

What he said.

I say get the 4.10's and free that AOD up a bit. Don't forget to change your speedometer gear too.

VibrantRedGT · Jan 18, 2012

They say every gear up is 220rpm. So 3:55's to 4:10's should be and extra 660rpm. So say your at 2000rpm at 75MPH, expect 2660rpm at 75MPH now. However the performance should make up for the extra rpm in my opinion. They say an AOD with 4:10's is roughly the same as a T-5 with 3:73's. I remember reading that in a magazine many moons ago.

Mustang5L5 · Jan 18, 2012

If oyu do a lot of highway driving, you may not like it.

I know when i had my AOD, i hated going on the highway with 3.73's. Crusing speed was about 70 and it felt like i was revving like crazy on the highway

LilBerx · Jan 18, 2012

1991notchbackLX said:
Must be Utah vernacular.

The 4.10 gear set is the typical recommendation for AOD cars. You're going to sacrifice fuel economy and some cruising RPM, though. Expect to see 2200-2500 RPM at highway speed.

ha ha, must be! the only highway cruising i will be doing is going up to cdubbs in idaho, which is about 20 miles away... but how much fuel economy am i projected to suffer around town?

I'm tempted on 3:73's to be in between, but i want to be able to have that power when racing others...

VibrantRedGT · Jan 18, 2012

Motive makes a 3:90 gear if you want to get in between 73's and 10's.

LilBerx · Jan 18, 2012

Have a link by any chance Vibrant? thanks.

LilBerx · Jan 18, 2012

Nevermind... found them, but they have a price on them.

Mustang5L5 · Jan 18, 2012

LilBerx said:
ha ha, must be! the only highway cruising i will be doing is going up to cdubbs in idaho, which is about 20 miles away... but how much fuel economy am i projected to suffer around town?

Depends on who you ask. You'll get numbers from 10-32 mpg highway every time a fuel economy thread pops up

Mintsick · Jan 18, 2012

I truthfully would not go through the time & money to move to 3.73 from a 3.55. A 3.90 gear isn't a bad suggestion.

Codydubb · Jan 18, 2012

Keep in mind that 4.10 rear end has a spool and will chew your tires up pretty bad....which is why i didnt want it, Drag Radials are expensive...

1991notchbackLX · Jan 19, 2012

Codydubb said:
Keep in mind that 4.10 rear end has a spool and will chew your tires up pretty bad....which is why i didnt want it, Drag Radials are expensive...

What has a spool?? I don't follow.

Codydubb · Jan 19, 2012

that 4.10 rear end he was looking at

VibrantRedGT · Jan 20, 2012

1991notchbackLX said:
What has a spool?? I don't follow.

Me either, I'm still not following. The 4:10's spool? You talking about lots of tire spin due to the tall gear?

Mustang5L5 · Jan 20, 2012

A spool is a axle that is pretty much solid all the way across. The two rear wheels don't spin independant of each other. Great for straight line drag racing, terrible for daily drivers because every time you turn, the inside wheel will chirp as it skips because it can only spin the same speed as the outside wheel. Chews up rear tires fast

1991notchbackLX · Jan 20, 2012

I understand what a spool is, I have one. I just didn't see anywhere in the post where anyone mentioned anything about having a spool. Must be some inside information or something.

Codydubb · Jan 20, 2012

1991notchbackLX said:
I understand what a spool is, I have one. I just didn't see anywhere in the post where anyone mentioned anything about having a spool. Must be some inside information or something.

Codydubb said:
Keep in mind that 4.10 rear end has a spool and will chew your tires up pretty bad....which is why i didnt want it, Drag Radials are expensive...

Yes it was inside info lol

AOD 3:55's VS 4:10's?

LilBerx

Active Member

1991notchbackLX

Active Member

Jason 302

VibrantRedGT

"STANGNET'S PENGUIN SMACKER"

Mustang5L5

That is…until I whipped out my Bissell

LilBerx

Active Member

VibrantRedGT

"STANGNET'S PENGUIN SMACKER"

LilBerx

Active Member

LilBerx

Active Member

Mustang5L5

That is…until I whipped out my Bissell

Mintsick

Codydubb

Member

1991notchbackLX

Active Member

Codydubb

Member

VibrantRedGT

"STANGNET'S PENGUIN SMACKER"

Mustang5L5

That is…until I whipped out my Bissell

1991notchbackLX

Active Member

Codydubb

Member

Similar threads

AOD 3:55's VS 4:10's?

Active Member

Active Member

"STANGNET'S PENGUIN SMACKER"

That is…until I whipped out my Bissell

Active Member

"STANGNET'S PENGUIN SMACKER"

Active Member

Active Member

That is…until I whipped out my Bissell

Member

Active Member

Member

"STANGNET'S PENGUIN SMACKER"

That is…until I whipped out my Bissell

Active Member

Member

Similar threads

Privacy & Transparency

Privacy & Transparency