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Old 02-13-2013, 11:21 AM   #1
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Default Gears

I ran my fiends 94 formy 6 speed at track and he pulled past me right before end of the quarter. I'm a auto so I was wondering what the best gearing would be to possibly beat him. Both cars are stock with just intake. My car is 94 z28 auto
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Old 02-13-2013, 12:01 PM   #2
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Originally Posted by 94lt1z View Post
I ran my fiends 94 formy 6 speed at track and he pulled past me right before end of the quarter. I'm a auto so I was wondering what the best gearing would be to possibly beat him. Both cars are stock with just intake. My car is 94 z28 auto
No knowing what your current gear ratio is.....I'd say the best gear for daily drivability, gas mileage AND performance would be 3.73 gears.

But hell......I'm a B-body guy, so take that with a grain of salt.

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Old 02-13-2013, 12:16 PM   #3
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Ya i wouldnt go any higher than 3.73 in a auto its an all around good gear thats what i have im a manual. And once i get my new rear end im goin 4.11s all the way
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Old 02-13-2013, 12:52 PM   #4
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You probably have 2.73s but you could possibly have 3.23s. Look on the sticker on your door that has all the couple letter codes and look for GU5 or GU2. Then you'll know if you have 3.23s or 2.73s.
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Old 02-13-2013, 08:34 PM   #5
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I am close to a deal on a 3.42. I think it will make a big difference from my 2.73. I like the idea of just bolting up the rear and I think if I put im 3.73s it will be time for another rear rather quickly lol. Also, gas is $4.00 plus.
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Old 02-13-2013, 08:38 PM   #6
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I am close to a deal on a 3.42. I think it will make a big difference from my 2.73. I like the idea of just bolting up the rear and I think if I put im 3.73s it will be time for another rear rather quickly lol. Also, gas is $4.00 plus.
A 3.42 rear end you mean? You would see a big improvement with them over the 2.73s.
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Old 02-13-2013, 09:43 PM   #7
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A 3.42 rear end you mean? You would see a big improvement with them over the 2.73s.
Lol, thanks for reading my mind.
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Old 02-13-2013, 10:20 PM   #8
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Easy way to tell (at least with the pontiacs) is if you have the 150 mph speedo you have 3.23 gears stock.
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Old 02-14-2013, 04:33 PM   #9
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Depends on tranny to.. I run 4.11 in my auto with .no issues , I'm not about to drive it on a long trip .. if you wanna be able to take it on longer trips too IDE stay w 3.73.. If memory is correct I gained over a half second going from 3.23 to 4.11
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Old 02-14-2013, 09:57 PM   #10
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42 Minutes left 3.73s and Carrier $100-125

GM 10 Bolt 7 5 3 Series 3 73 3 73 Ring and Pinion 3rd Member Spider Gears Set | eBay
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Old 02-14-2013, 10:13 PM   #11
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Thanks bro, i would rather smack in the 3.42 whole housing.
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Old 02-15-2013, 01:34 AM   #12
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I have a chance to get some used 3.73s cheap but I would have to run the spacer to make them fit in my 2 series carrier. Is the spacer a dumb idea in an already weak rear end?
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Old 02-15-2013, 08:04 AM   #13
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I'd just get a 2 series gear set. They'll be stronger than that 3series set with a spacer. Spacer will probably make setting back lash a pain also
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Old 02-15-2013, 10:40 PM   #14
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3.73 for auto for street/strip and a converter.

He has 3.42s.
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Old 02-16-2013, 01:33 AM   #15
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Id keep running him at the track eventually ur friends rear will blow from launching. Id do 373s. Yukons are supposed to be pretty good i hear
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