does anyone know what gears came stock in a 79 z28

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Old Dec 25, 2009 | 12:21 AM
  #11  
heartbeat_jr's Avatar
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thanks to everybody and i believe it still have the stock gears because the only thing that wasnt stock on the original motor when i got it was the carb and timing chain so i believe it is stock but i guess when i get it back ill bust it open and see its about time to change the gear oil anyway so i guess i will just count the teeth and find out but thank you all for your suggestions and merry christmas.
 
Old Dec 27, 2009 | 10:42 AM
  #12  
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3.42:1
 
Old Dec 30, 2009 | 12:22 AM
  #13  
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"just want a true posi instead of that old one legger but i was just wondering what gears came in it stock. "

OP posed the question. I answered it.

John
 
Old Mar 10, 2021 | 09:51 PM
  #14  
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Originally Posted by 79ZED
There was only two ratio's available for the 1979 Z28. Tha auto got the 3.42, the 4 speed cars got the 3.73. No other options were available.

John
about 2500 g92 rear end optioned z28s in 1979. Performance rear axle.

 
Old Mar 11, 2021 | 03:14 PM
  #15  
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Ben,

That's true, but the G92 option was for all other Camaro models, it wasn't available on the Z28. I believe, though I'm not certain, that the G92 may have been 2:73 or 3.08 depending on the model. The 3.42 or 3.73 ratios were not available on the G92 option.

John
 
Old Mar 13, 2021 | 11:23 AM
  #16  
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https://www.differentials.com/techni...io-calculator/

If you want to know what you actually have for sure you'll have to pull the cover and count the number of teeth on the ring gear and the pinion gear.
The link above has a calculator but it's pretty simple division.
It also has a link to find what was available for your car.
 
Old Mar 14, 2021 | 12:34 PM
  #17  
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Originally Posted by 79ZED
Ben,

That's true, but the G92 option was for all other Camaro models, it wasn't available on the Z28. I believe, though I'm not certain, that the G92 may have been 2:73 or 3.08 depending on the model. The 3.42 or 3.73 ratios were not available on the G92 option.

John
I noticed another thing in the OP's post, he said it was an open diff.. Stock Z28 cars did not have an open diff.. Maybe something's broken in there?
 
Old Mar 14, 2021 | 05:56 PM
  #18  
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Originally Posted by F(at)-Body
I noticed another thing in the OP's post, he said it was an open diff.. Stock Z28 cars did not have an open diff.. Maybe something's broken in there?
Or maybe rear axle replaced at some point,cars this old can have a lot of non original parts especially cars like Z28's that tend to get run hard and often abused over their lifetime. Only way to know what he's got is pull the cover and look inside.
 
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