Transmissions and Drivetrain Need help with your trans? Problems with your axle?

Gear ratio

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Old Dec 16, 2018 | 01:48 PM
  #1  
Mr.250r's Avatar
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From: Stl, mo
Car: 1988 Iroc
Engine: 305 TPI
Transmission: T5
Gear ratio

Can anyone confirm this is indeed a 4.10 ratio gear set? Doesn't seem to be stamped like stock set that I'm used to at least but maybe the aftermarket does it different. It's the only numbers I can see decoding to that.
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Old Dec 16, 2018 | 02:50 PM
  #2  
Lurbie's Avatar
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From: Davison, MI
Car: 89 Camaro
Engine: Dart SHP 400-Holley Terminator EFI
Transmission: Tremec T56 Magnum F
Axle/Gears: Strange S60 3.55:1
Re: Gear ratio

Count the number of teeth on the ring gear. Count the number of teeth on the pinion gear. Divide the teeth count of the ring gear by the teeth count of the pinion gear, that's your gear ratio.
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Old Dec 17, 2018 | 09:18 AM
  #3  
big gear head's Avatar
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Re: Gear ratio

Yeah, it's that simple. Count and divide.
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Old Dec 17, 2018 | 10:03 AM
  #4  
Mr.250r's Avatar
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From: Stl, mo
Car: 1988 Iroc
Engine: 305 TPI
Transmission: T5
Re: Gear ratio

The whole point was to avoid that just because no big deal I ran the #s it's a motive gear 4.10 set, I appreciate the help though
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Old Dec 18, 2018 | 03:47 PM
  #5  
midias's Avatar
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: Gear ratio

https://www.summitracing.com/parts/mgr-g875410

Here it is based on the part number from the gears
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Old Dec 23, 2018 | 06:12 PM
  #6  
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From: Spokane WA
Car: 92 Lingenfelter Z28 articwhite
Engine: Aluminum 615BBC
Transmission: Th400wbrake/curri entps9" locker
Axle/Gears: 4.11/4.30/4.56
Re: Gear ratio

7.5 anything past 350hp and sticky tires the pinon gear with drop teeth like crazy..just sayn..
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