After many hours researching this, I've come to the conclusion that one of those 3 speedo gearings are what I need to get back on track. I run a 3.73 10-bolt with 16" tires and T5 tranny. I have no idea what gears I currently have. Any opinions on which one would work?

I'm curious also, this car had a 2.77 when I bought it. The speedo was under by a bit. I had the speedo recalibrated at that time, could this effect the gears I install to correct the problem this time?

Thank You..
Eric

 

I'm just looking for an idea before I go to the local GM store to order the parts. I appreciate any advice on this subject. Thanks again for the input.

 

16" tires - I assume that's a typo and you meant 26" tires.

In that case, your best bet would be the 7/20 combination.
7-tooth drive gear - #14071731
20-tooth driven gear - #14090593

The driven gear might be hard to find so in that case you'll have to go with the 21-tooth driven gear - #14090594. But that would give you a noticeable deviation on your speedometer.

Hope this helps.
Lou

 

Thanks Lou. Yes that was a typo. I meant to say I have 25.65" tires or "16"s.