Gear Ratio Option Question

[RC81]

Was the 3:07 ratio an option in 81 for an automatic? In looking at my owners manual it shows the2:87 standard, but the 3:07 as an option for the auto. Am I reading this correctly? Maybe this is the G92 RPO code referenced in the Black Book?

 

[spikebot 81]

I thought the 2:87 was the only gear for a auto and the taller gear was for the 4 speed but someone here can set us both straight I hope.

 

[Hib Halverson]

"G92" has commonly been the RPO code for "performance axle ratio" with automatic transmissions, however, the actual ratio varied depending on model year.

 

[RC81]

If any of you guys have your owners manual look on page 7-3. It gives ratios and options, but shows the 3:07 standard with the 4-speed and an option for the auto, but down below it shows it to be 2.72 for the manual and 2.87 for the auto. What am I missing?

 

[black_81_vette]

mine was the 2.72 ratio with a 4 speed.

 

[RC81]

Yeah, I dont know if the 3:07 was offered in 81.