Question about the Z51 option.
Thread Starter
Drifting
Joined: Apr 1999
Posts: 1,850
Likes: 5
From: Grove City,Oh,USA
Question about the Z51 option.
I know you get the better suspension and the trans cooler ,BUT do you get the better axle ratio also?? Or do you need the g92 option?
If you DO get the performance axle are the rear ratios the same for the auto and 4+3?
thanks
Mace
If you DO get the performance axle are the rear ratios the same for the auto and 4+3?
thanks
Mace
Burning Brakes
Joined: Jan 2001
Posts: 964
Likes: 0
From: Cedar Park Texas
Re: Question about the Z51 option. (Mace)
The Z51 and the Performance Axle Ratio are two different options and I don't believe they are dependent upon one another. In other words, you can have one without the other. On my 96 auto I had both options. On my current CE I have Z51, and of course no performance axle since it is a 6 speed. The Performance Axle is a very nice option as it adds a little "get up and go" to the performance. I believe a majority of corvette owners/buyers also desire the Z51 option. Hope this helps some.
Safety Car
Joined: Dec 1999
Posts: 4,691
Likes: 1
From: Framingham MA
Re: Question about the Z51 option. (Mace)
You can look at you RPO codes for G44 to see if you have 3.07:1 gears. I believe most 85&86 Z51 cars came with G44, but you never know about gear ratios.
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: Question about the Z51 option. (Mace)
you dont get a trans cooler, you get an oil cooler. Mine is Z51 and i also have the G44-3.07 gears. They arent dependent on each other. The standard for A4 was 2.59 and the 4+3 had a 3.07 standard.
Safety Car
Joined: Dec 1999
Posts: 4,691
Likes: 1
From: Framingham MA
Re: Question about the Z51 option. (vader86)
Mine is Z51 and i also have the G44-3.07 gears. They arent dependent on each other. The standard for A4 was 2.59 and the 4+3 had a 3.07 standard.
As for your car, does your RPO list include G92? If it doesn't list G92 then your G44 ratio was added as part of the Z51 package. I always have thought (and the Z51 I have seen and test driven) that the G44 was included in the early Z51 package.
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: Question about the Z51 option. (dgoodhue)
you are right, i wasnt thinking of 84-85's. No i dont have the G92 performance axle. But i dont think the Z51 package included the 3.07's standard, i'll have to check on it though.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Drifting
Joined: Sep 2001
Posts: 1,875
Likes: 27
From: Long Beach NY
Re: Question about the Z51 option. (JoBy)
I have the Z-51 option on my '86. I seem to remember reading somewhere about a difference in the brakes, either rotor size or pad and caliper. Anybody know anything about this?
Barrier :confused:
Barrier :confused:
Safety Car
Joined: Dec 1999
Posts: 4,691
Likes: 1
From: Framingham MA
Re: Question about the Z51 option. (Barrier)
I have the Z-51 option on my '86. I seem to remember reading somewhere about a difference in the brakes, either rotor size or pad and caliper. Anybody know anything about this?
Barrier :confused:
Barrier :confused:
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Re: Question about the Z51 option. (Mace)
WOW look ath the spring rate even in the stock 84.
Mace
Mace
