What are the advantages and disadvantages of a 410 rear end vs a 390? I know the 410 will make your car quicker but how much more compared to the 390? How much does it affect driveability in town and on the highway?

 

ZO6 or base C5? Auto or manual?

 

Zo6 manual

 

I have 4.10’s in my rx7 which has the same trans ratios as a base c5. I would imagine 4.10’s with an m12 would be pretty short, but not unbearable.

Really depends on your power level, and future goals though. For a stock displacement NA car 4.10’s would be fine. If a blower is in your future then 3.42’s might be better than either.

 

Gracias!

 

There’s some good gear calculators + speed effect sites online.

 

My C5Z has around 450whp and 3,90 cogs. It would be interesting to drive a similar car, with 4.10's, though I'm not sure anything lower than a 3.90 is needed.

 

This calculator allows you to see what your approximate speed will be in a certain gear/rpm/axle ratio. Put in the correct info first, and it will be accurate.
http://www.tremec.com/calculadora.php

 

There’s not a huge difference between the 3.90’s and 4.10’s, I’ve ran the m12 trans with stock 3.42, 3.73, 3.90 and 4.10’s, if you cruise a lot on the interstate around 80+ then would choose the 3.90 but I love my 4.10’s

 

I might take an occasional road trip but most of my driving is around town. 3.90s sound like they might be a good compromise.

 

Manual

 

O-70 is more my fun zone. I can't afford to get a ticket going 90. These cars get to 90 really fast rowing through the gears. My neighbor has a ZL1 I need to ask him where he goes!

 

I don't want to get beat by an STI! lol!

 

I have a 4.10 with an m6, which is similar to 3.90 with m12. Lots of fun. Its fine on the highway too. Go for it. The benefits grow with a cam...gets you in the upper rpms faster.

 

Nice thank you! Scott Yeah I didn't buy this with gas mileage in mind lol!