I just got off the freeway and hear is what I had...

60mph 2200 - 2300 RPM
70mph 2300 - 2400 RPM

I put a range since it's a little hard to tell exactly where the guage is reading but it is closer to the lower end of the range than the higher.

Thanks Again!

 

I think you have 3.73 or 4.10 allready installed. Personaly I would leave it.

 

Im running a 3.73 and i get gear whine at 80mph +/-. Ive spoken to a few others that also run a 3.73 and all have the same whine at the same speed. Others say that if they whine they werent installed correctly but i hear more whining 3.73s than non whining 3.73s. Seems like a hit or miss setup to me.

I think you may have 3.73s already cuz im around the same rpm at 60. Im also running an AOD.

3 rotations = 3.08
3 1/4 rotations = 3.27
3 1/2 rotations = 3.55
3 3/4 rotations = 3.73

...you get the idea.

 

Thanks for the replies guys. I am thinking I may just stick with what I have till it breaks . It seems from all my reading that the only downside of going from 4.10 to 3.73 was about 1mph and minimal difference is wear. I am still going to take it to the shop to get the speedo gears put in so I can actually know how fast I am going without thinking.

Thanks Again!