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'98 C5 automatic gear ratio change????

Smolan

Member
Joined
Jun 13, 2007
Messages
8
Location
CA
Corvette
1998 Convertible Torch Red
Hello all, new here. Your forum is very informative. I just need a bit of advice. I purchased my first Vette a '98 C5 Convertible with an auto trans with 43000 miles, all stock, no mods. In a week the differential started screaming, not due to abuse. Diagnosis bad gears. Stock ratio is 2.73, since I have to replace the gears, what negative results if any would occur between going with 3.42 vs 3.73? Any suggestions would be greatly appreciated.

Thanks
 

Smolan

Member
Joined
Jun 13, 2007
Messages
8
Location
CA
Corvette
1998 Convertible Torch Red
Thanks for the R&R pics

The information and pictures are very helpful. I still need to determine if 3.73 ratio gears are too much for an automatic trans. I will mostly be using the car as a driver with the occassional burst of fun and racing as many Fords as possible. If anyone can provide specs or information on the details as how and why to choose which ratio, that would be most helpful.

Thank you
 

Mike Mercury

Well-known member
Joined
Jun 24, 2003
Messages
145
Location
Ohio
Corvette
2002, 2003
I still need to determine if 3.73 ratio gears are too much for an automatic trans.


their is no mechanical problems installing 3.42, 3.73, 3.09, or 4.10's in an A4 C5.

The deciding factor in choosing is... for you to determine where (how far) you want the mod to take you.

Personally, 3.42's took me exactly where I wanted to be. For you, your end goal may be different.
 

Smolan

Member
Joined
Jun 13, 2007
Messages
8
Location
CA
Corvette
1998 Convertible Torch Red
Gear ratio

their is no mechanical problems installing 3.42, 3.73, 3.09, or 4.10's in an A4 C5.

The deciding factor in choosing is... for you to determine where (how far) you want the mod to take you.

Personally, 3.42's took me exactly where I wanted to be. For you, your end goal may be different.

Based on my driving style, I feel the 3.42:1 gear ratio will suit my needs. Thank you for the informative replies.
 

c5y2k

Well-known member
Joined
Oct 1, 2005
Messages
475
Location
Gallatin, TN
Corvette
2000 Nassau Blue Vert
Smolan, I have been looking into this mod and for the everyday cruise around town, drive to work on Fridays with a "spirited" drive in-between 3.42s would be the max I would go.

This might help also. (this is not mine and I horked it from another site)
Burnout_GearRatioChart-05.jpg
 

Smolan

Member
Joined
Jun 13, 2007
Messages
8
Location
CA
Corvette
1998 Convertible Torch Red
Gear change

Thanks for the RPM chart. Looks like the 3.42 ratio would suit my drinving needs well. Thanks again for the iinformation.

Smolan, I have been looking into this mod and for the everyday cruise around town, drive to work on Fridays with a "spirited" drive in-between 3.42s would be the max I would go.

This might help also. (this is not mine and I horked it from another site)
Burnout_GearRatioChart-05.jpg
 

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