How to tell if they're 3.73s

iwannarace67

New Member

Sep 24, 2001

210

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0

Chicago, IL

Jun 16, 2004

#1

• Jun 16, 2004

• #1

So a friend of mine just went out and bought a fox body over the weekend which is cool. It's a 89 5-speed with supposedly a 3.73 gear. Now the car accelerates like a bat out of hell but it doesn't quite feel like a 3.73. Now how can I tell if the rear is really 3.73? Count the teeth on the gears?

 

ironheart1

New Member

Mar 13, 2004

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Connecticut

Jun 16, 2004

#2

• Jun 16, 2004

• #2

I believe the following will work.

Get the rear of the car up on jackstands, take it out of gear and make sure the Ebrake is off. Make a small mark on your driveshaft and have someone turn the drive tire in a complete rotation... Count the number of times the driveshaft goes around. If it goes around about 3 and a half times, it's 3.55s, about 3 and 3/4 times, 3.73s.. Just over 4 times, 4.10s, etc.

 

cjman15

Banned

Apr 15, 2004

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Fairfield, PA

Jun 16, 2004

#3

• Jun 16, 2004

• #3

thanks, i was wonderin how to do that too

 

QDRHRSE

New Member

Dec 31, 2002

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Palmdale, CA

Jun 16, 2004

#4

• Jun 16, 2004

• #4

ironheart1 said:

I believe the following will work.

Get the rear of the car up on jackstands, take it out of gear and make sure the Ebrake is off. Make a small mark on your driveshaft and have someone turn the drive tire in a complete rotation... Count the number of times the driveshaft goes around. If it goes around about 3 and a half times, it's 3.55s, about 3 and 3/4 times, 3.73s.. Just over 4 times, 4.10s, etc.

Click to expand...

Yep. This is definitely a good way to check.

 

SuperStang83

Founding Member

Mar 21, 2001

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Boyertown, Pa

Jun 16, 2004

#5

• Jun 16, 2004

• #5

Yep, that's the easiest way to do it!

 

iwannarace67

New Member

Sep 24, 2001

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Chicago, IL

Jun 16, 2004

#6

• Jun 16, 2004

• #6

yup it works...they are 3.73s.

 

Euphoric306

New Member

Apr 5, 2004

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Jun 16, 2004

#7

• Jun 16, 2004

• #7

i was gonna suggest that but didnt want to feel like an idiot if it wouldnt work but i see now it does, thanks

 

t69r00p69

Founding Member

May 28, 2002

260

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Houston, Tx

Jun 17, 2004

#8

• Jun 17, 2004

• #8

you could have just tok the bolts of the pumpkin and counted the teeth on the gears but the other way is seems alittle easier

 

ironheart1

New Member

Mar 13, 2004

131

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Connecticut

Jun 17, 2004

#9

• Jun 17, 2004

• #9

Yeah, I have to do this myself still. I was actually told 4.10s, I am at 2600RPM at about 70, and all the math works out, including the SOTP feeling. But I never confirmed it for sure.