Do I Have Gears?

S

SBC RACING

New Member

Nov 16, 2003

141

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Santa Barbara, Califonia

Sep 25, 2004

#1

• Sep 25, 2004

• #1

I have the feeling that the previous owner of my car installed some rear gears, the reason i think so is that 1st and 2nd gear are pretty short and on the freeway according to the speedo im going 75-80 and people are riding my ass. The car definently does not feel like its going 75-80 so im thinking its got some gears. What do you guys think? Are these the typical symptoms?

 

4Jenna

Founding Member

Sep 12, 2001

4,326

6

69

AZ

Sep 25, 2004

#2

• Sep 25, 2004

• #2

Pull the diff cover off....mine say 3.73 embossed on the gears...or you can count the tire revolution thingy

 

W

wytstang

Mustang Master

Mar 14, 2004

4,988

4

78

Summerville,SC missing South Fl. weather :(

Sep 25, 2004

#3

• Sep 25, 2004

• #3

If at 70mph your RPM's read 2200 more than likely you have 3.73's

 

SN95StangMan

New Member

Jul 5, 2003

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Lynwood, CA

Sep 25, 2004

#4

• Sep 25, 2004

• #4

eades5.0 said:

or you can count the tire revolution thingy

Click to expand...

That would be the easiest and fastest way to do it.

 

SN95StangMan

New Member

Jul 5, 2003

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Lynwood, CA

Sep 25, 2004

#5

• Sep 25, 2004

• #5

Gearbanger 101 said:

Yup...Say if you had 3.73 gears, then for each full drive shaft rotation, you rear tire should turn approx 3 3/4 turns. 3.55's would be approx 3 1/2 turns, 4.10's would be a little over 4 turns and so on.

Click to expand...

Are you sure it isnt the other way around. For each rotation of the tire, the d/s should rotate approximately 3 1/2 turns if you have 3.55's

 

Gearbanger 101

Straight Outta Locash

20+ Year Stangneter

Aug 10, 2002

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Ontario, Canada

Sep 25, 2004

#6

• Sep 25, 2004

• #6

Yup...Say if you had 3.73 gears, then for each full drive shaft rotation, you rear tire should turn approx 3 3/4 turns. 3.55's would be approx 3 1/2 turns, 4.10's would be a little over 4 turns and so on.

 

Gearbanger 101

Straight Outta Locash

20+ Year Stangneter

Aug 10, 2002

9,457

1,377

234

Ontario, Canada

Sep 25, 2004

#7

• Sep 25, 2004

• #7

SN95StangMan said:

Are you sure it isnt the other way around. For each rotation of the tire, the d/s should rotate approximately 3 1/2 turns if you have 3.55's

Click to expand...

Possibly, I guess I got it backwards, but I tend to drink to much at times I'm going to blame it on a combination of that and my dyslexia.

 

GRGT1994

New Member

Sep 22, 2004

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Sep 26, 2004

#8

• Sep 26, 2004

• #8

wytstang said:

If at 70mph your RPM's read 2200 more than likely you have 3.73's

Click to expand...

That might not work for our boy. It sounds like he might have an upgraded gear set, without the corresponding speedo. Seeing how he has people riding up on him on the highway and it doesn't seem like he's going at speed reading on the speedo.

Try the counting method.

 

Thomas302

Member

Jan 9, 2004

119

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Alamogordo, NM

Sep 26, 2004

#9

• Sep 26, 2004

• #9

Its real simple, it will take less then 5 minutes. Just jack up the rear end, and while your buddy rotates the tire one revolution, count how many times the drive shaft rotates. ie 1 turn of the tire = 3.73 turns of the drive shaft. It may be a little off if you have bigger or smaller tires, but it will be close enough to tell what you have.

 

Zero Signal

Active Member

Feb 24, 2003

2,633

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Tucson, AZ

Sep 26, 2004

#10

• Sep 26, 2004

• #10

A revolution is an angular measure so it's independent of the radius thus the tire size won't effect anything. I say rotate the wheels ten times and count the driveshaft turns if you want alittle more certainty

 

mo_dingo

20+ Year Stangneter

Aug 26, 2003

3,031

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Tucson, AZ

Sep 26, 2004

#11

• Sep 26, 2004

• #11

Zero Signal said:

A revolution is an angular measure so it's independent of the radius thus the tire size won't effect anything. I say rotate the wheels ten times and count the driveshaft turns if you want alittle more certainty

Click to expand...

Good point. The difference between 3.55 & 3.73 isn't much. But when you multiply it 10 fold, it makes it much easier to discern.
Scott

 

SmithCobra95

New Member

Aug 21, 2004

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Sacramento, California

Sep 26, 2004

#12

• Sep 26, 2004

• #12

Thomas302 said:

Its real simple, it will take less then 5 minutes. Just jack up the rear end, and while your buddy rotates the tire one revolution, count how many times the drive shaft rotates. ie 1 turn of the tire = 3.73 turns of the drive shaft. It may be a little off if you have bigger or smaller tires, but it will be close enough to tell what you have.

Click to expand...

NOTHING is ever easy when working on a car lol

 

Venom351R

Founding Member

Apr 27, 2002

4,548

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MAINE

Sep 27, 2004

#13

• Sep 27, 2004

• #13

Once you find out what gear ratio you have make sure to buy the correct spedo gear to correct your MPH on the highway. The prob isent that you have gears, its that someone put gears in the car and never changed the spedo gear.

 

H

hiattwl

New Member

Jun 9, 2003

145

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0

Cullowhee, and Andrews NC

Sep 27, 2004

#14

• Sep 27, 2004

• #14

I've got 3.73's and the correct speedo gear, and when i'm running 85/90, hondas like to ride my ass, as long as i'll let em, but anyway, i think that's just them people that's got slow cars following us so they can see what a real car is.

lol