Rear gear suggestions

1990lx5oh

New Member

Aug 10, 2007

26

0

0

Weaverville, NC

Apr 6, 2009

#1

• Apr 6, 2009

• #1

I was wondering what ring and pinion gears some of you are running? I'm fixing to upgrade and don't know what ratio I want to go with. But my concern is it's my daily driver of about 60 miles a day highway. So I'm looking for a happy medium of quick accel and decent highway mileage. Thanks in advance for any suggestions.

 

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lang williams

New Member

Jun 11, 2003

567

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0

cleveland, oh

Apr 6, 2009

#2

• Apr 6, 2009

• #2

is the car a 5 speed or auto? I put 3.27s in my 87 aod car and really liked them. they woke the car up, made a nice chirp on the 1-2 shift (with a shift kit), an I didn't notice a change in my mpg. i got around 21 per gal when i drove like a normal person. now i see the 331's are standard in the 05 an up cars an they show up on ebay an craigs list cheap, I'd throw a set in my dd if i had 273s.

 

1990lx5oh

New Member

Aug 10, 2007

26

0

0

Weaverville, NC

Apr 6, 2009

#3

• Apr 6, 2009

• #3

It's a 5 speed, I knew there was something I was forgetting to say...

 

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cobrat56

New Member

Apr 5, 2009

1

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0

ny

Apr 7, 2009

#4

• Apr 7, 2009

• #4

i put 3:55's in mine an its great on the highway most people do 3:73's or 3:55's for the highway driving

 

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Sicarius428

Active Member

Jan 6, 2004

2,085

5

49

Apr 7, 2009

#5

• Apr 7, 2009

• #5

3.55s are a good all around gear. 3.27s will definately be better for the freeway but don't get anything bigger than 3.55 on that commute. For a 3.27 you can justify buying a whole sn95 rear end and doing a brake upgrade/5 lug swap because he GTs had 3.27 gears. Might be cheaper tha having a set installed.
On a side note, If you are looking for a set of 3.55s, I have a set of NIB FMS 3.55s in the garage. PM me if you are interested.
Kevin

 

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habiv

Member

Oct 28, 2004

125

1

16

Apr 7, 2009

#6

• Apr 7, 2009

• #6

I had a set of 3:27's put in last summer and I am very happy with them. People thought I was nuts not going with 3:55's, but I didn't want anything crazy. Also, I kind of did what sicarius428 said above. I was at the Ford nationals in carlisle and I saw a guy selling Ford 3:27 gears that he had taken out of an sn95. I picked them up for $75. The guy I bought them from had a bunch of 3:27's. He said that everybody comes in to his shop wanting to change to a lower rear end gear and they always leave the old gears with him. If you do this though, you just have to inspect the gears and make sure there is no wear on the teeth.

Here is an RPM calculator so you can see the difference between all of the gear ratios. 3:27's at 65MPH are doing about 1900 RPM's.

Ford Mustang: Mustang Tech: Calculators & Decoders: RPM Calculator

 

67coupe

Founding Member

Apr 5, 2002

658

402

93

Huntsville, AL

Apr 7, 2009

#7

• Apr 7, 2009

• #7

For what is worth, I drive 50 miles/day for my commute. Average around 23 mpg with mods in sig. I also make frequent road trips up to 400 miles. In total, about 17,000 miles/year. I love the 3.73's and actually, when at the drag strip, wish I had 3.90 or 4.10.

 

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Haus

Member

Jul 20, 2005

408

0

16

Apr 7, 2009

#8

• Apr 7, 2009

• #8

my 92 came with 3.27's from the factory so i cant really say anything.

 

bynummustang

Seen my other Jackstand?

Jul 24, 2005

1

2

69

NC State University

Apr 8, 2009

#9

• Apr 8, 2009

• #9

Go to a 3.73 and call it a day. Gears will wake a car up.

 

SteedaGT9150

Advanced Member

Nov 10, 2004

1,351

59

68

Maryland

Apr 8, 2009

#10

• Apr 8, 2009

• #10

bynummustang said:

Go to a 3.73 and call it a day. Gears will wake a car up.

Click to expand...

couldnt have said it better

 

Beasty306GT

Active Member

Dec 19, 2002

671

4

28

Oxford,Mass

Apr 8, 2009

#11

• Apr 8, 2009

• #11

go 3.73 u will love them

 

faststang90

10 Year Member

Nov 5, 2007

522

16

49

baytown texas

Apr 9, 2009

#12

• Apr 9, 2009

• #12

355

i had 3:55s in my last street car 5 speed car and loved it.