C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Changing the Overdrive Shift Point

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Old Apr 25, 2020 | 08:25 PM
  #41  
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Originally Posted by WVZR-1
I don't need PHOTOS!! Trust me there's a GU2/G92 Performance Axle for Y67!!! If there weren't one I wouldn't have mentioned it!!! Look a little harder!
My 93 FSM list the following axles GH0 3.54, GM1 2.59, GM3 3.45, GT7 3.33, GU2 2.73, G44 3.07, G92 Performance Ratio Rear Axle
Does this mean they put all these axles into 93 Corvettes?
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Old Apr 25, 2020 | 08:25 PM
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Originally Posted by WVZR-1
I don't need PHOTOS!! Trust me there's a GU2/G92 Performance Axle for Y67!!! If there weren't one I wouldn't have mentioned it!!! Look a little harder!
That's somewhat abrasive, wouldn't you say? Could you please point me in the right direction? Again, I've seen plenty of G44+G92 (my '94 is this combination of RPOs) but I haven't seen any GU2s. Thank you.
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Old Apr 26, 2020 | 12:17 AM
  #43  
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Originally Posted by SloJo
My 93 FSM list the following axles GH0 3.54, GM1 2.59, GM3 3.45, GT7 3.33, GU2 2.73, G44 3.07, G92 Performance Ratio Rear Axle
Does this mean they put all these axles into 93 Corvettes?
Slojo, here’s everything GM printed for the 93 corvette including specs.
https://www.gmheritagecenter.com/doc...t-Corvette.pdf
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Old Apr 26, 2020 | 12:33 AM
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Originally Posted by 1Sin
Slojo, here’s everything GM printed for the 93 corvette including specs.
https://www.gmheritagecenter.com/doc...t-Corvette.pdf
Thank you for this! So according to this brochure, the G92 was 3.07 for the coupe and 2.73 for the convertibles. That explains why I never saw any 2.73s. Very good to know!
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Old Apr 27, 2020 | 08:40 PM
  #45  
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Originally Posted by Nomake Wan
Thank you for this! So according to this brochure, the G92 was 3.07 for the coupe and 2.73 for the convertibles. That explains why I never saw any 2.73s. Very good to know!
What page did you find that on? Search doesn't work on this PDF for some reason.
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Old Apr 27, 2020 | 09:09 PM
  #46  
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Originally Posted by SloJo
What page did you find that on? Search doesn't work on this PDF for some reason.
It's actually listed on multiple pages, but a nice table can be found on page 78.
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Old Apr 27, 2020 | 10:27 PM
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Originally Posted by Nomake Wan
It's actually listed on multiple pages, but a nice table can be found on page 78.
Thanks, Nomake Wan!
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Old Aug 15, 2021 | 08:17 AM
  #48  
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Originally Posted by 1Sin
The easiest way to fix your annoyance if it is the TCC lock up MPH would be to contact Solomon from the link in post #5 and mail your PROM to him for a one time tune and have him increase the TCC lock up MPH and you would get a better tune as well then you could just swap proms in your ECM.
I have to agree with ihatebarkingdogs changing that 2.59 gear would make a huge improvement in torque and fun factor but might also might require some adjustments to the OEM settings in the ECM PROM to take full advantage of a gear change.
That was how I ended up having to sending mine to him I changed to a 4.10 gear and my speedometer among other things had to be changed.

where did you get a 4.10 for d36 ? how has it been? please tell us more. thanks.
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Old Aug 15, 2021 | 09:37 AM
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Sorry for the misunderstanding Me93 the 4.10 gear was a F body not the C4. A 3.73 is big as you can fit into a D36. A 3.73 is perfect for a street car and changing the gear is about the biggest improvement for acceleration per dollar. The tune helped but some issues like inability to downshift manually can only be done with something like a Trans go shift kit to rework the valve body
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