How to tell what gear an 05+ has

Kornnut

Founding Member

Nov 25, 2000

1,999

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108

Tulsa

Feb 20, 2009

#1

• Feb 20, 2009

• #1

Wondering what gear the 06 the wife and I picked up tonight has in it. Any way to tell by a tag on the rear, or door sticker? I know I can always put the rear on jack stands and rotate the wheel, then count the times the drive shaft goes around. I am lazy though. Its an auto. Could it have 3:55's from the factory or did all the autos come with 3:31?

 

NastyStang113

New Member

Sep 12, 2008

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Florida

Feb 20, 2009

#2

• Feb 20, 2009

• #2

The rear differentials have a tag on them. I believe all automatics came with 3.31s.

 

anthony05gt

Active Member

Mar 18, 2006

1,262

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Maryland

Feb 21, 2009

#3

• Feb 21, 2009

• #3

What he said^

 

DarkFireGT

Playing with my wife's really makes me want one.

10 Year Member

May 23, 2004

692

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89

East Moline, IL

Feb 21, 2009

#4

• Feb 21, 2009

• #4

autos come with 3.31.

 

TBrad

New Member

Feb 15, 2009

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Dallas, Texas

Feb 21, 2009

#5

• Feb 21, 2009

• #5

Kornnut said:

I know I can always put the rear on jack stands and rotate the wheel, then count the times the drive shaft goes around.

Click to expand...

............
Does that really work?

Count how many teeth on the ring gear.
Count how many teeth on the pinion gear.
Divide into each other... will give you the ratio.

If they are still factory ford gears the pinion has the ratio stamped into the face.
Some will still have the tag on the cover with the gear codes.

 

kooldawg6

mine works really well and can take a fair amount

Aug 31, 2006

1,679

2

38

Central VA

Feb 22, 2009

#6

• Feb 22, 2009

• #6

DarkFireGT said:

autos come with 3.31.

Click to expand...

...but a tune and 4.10s really wake it up

 

stangzilla100

New Member

Oct 19, 2008

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Feb 22, 2009

#7

• Feb 22, 2009

• #7

you can check the code on the door sticker

BG — 3.31 — non-limited slip, base vehicle with manual or automatic transmission
CD — 3.55 — limited slip, GT with manual transmission
CG — 3.31 — limited slip, GT with automatic transmission

 

02nightmaregt

To hell with your Mustang, I want to see your HOG!

Jul 1, 2007

513

4

19

Southern Indiana

Feb 22, 2009

#8

• Feb 22, 2009

• #8

TBrad said:

............
Does that really work?

Count how many teeth on the ring gear.
Count how many teeth on the pinion gear.
Divide into each other... will give you the ratio.

If they are still factory ford gears the pinion has the ratio stamped into the face.
Some will still have the tag on the cover with the gear codes.

Click to expand...

yes that works

 

blacksheep06

New Member

Jan 31, 2006

288

0

0

Feb 22, 2009

#9

• Feb 22, 2009

• #9

Here's the best way to tell.................













If it hauls ass, it has 4.10's.