rear end ratio

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Aug 10, 2001 | 05:47 PM

87firebird

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Joined: Mar 2001

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From: Indiana

rear end ratio

I don't know what my rear end ratio is and was wondering if there is any equation for getting an estimate on what it is. Like if your going 60mph at so many rpm then the ratio would be around ... Is there any equation to get an estimate of what my rear is?

Thanks for whoever can help

Aug 10, 2001 | 06:02 PM

88greyiroc

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From: st.stephen , nb , canada

i was told to do it this way put your car in D not overdrive if its an auto and get the car goin a steady 70mph and whatever your rpms read is your gear ratio or if you have a 5spd put the car in 4th and go 70mph.and there you have it

Aug 10, 2001 | 08:19 PM

simon

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Joined: Nov 2000

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From: FL

Go to the main page of this site and select the "equations" section. There is a calculator specifically designed for this purpose.

Aug 11, 2001 | 02:17 AM

Kevin91Z

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Joined: Jul 1999

Posts: 10,950

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From: Orange, SoCal

Car: 1990 Pontiac Trans Am

Engine: 355 TPI siamesed runners

Transmission: Tremec T56

Axle/Gears: 12-Bolt 3.73

What kind of engine do you have and what trans do you have? There is usually only one or two ratios it can be, unless it was changed. Look at the Tech Database on this site.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
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