Powerm01

Ok, Time to get rid of this one wheel burn out!!! I have a 350 with limited mods. It's bored😝 .30 over with a high comp can. I want a limited slip rear end with either 3.43 gears or 3.73. I do drive on the high way every once in a while. I live in south eastern Michigan. Any suggestions.

Powerm01

😝Cam. Also should I go with Eaton or Auburn or does it matter

oldsmobiledave

I prefer the Eaton to the Auburn.


You need more info to pick a gear that matches your driveline most important of which is what is your rear tire height?


Personally I would avoid the 3.73. 3.42s are plenty for a street driven car with a 27" tall tire. If you have 28" tall tire you might not mind the 3.73s but you will be spinning 3400 rpm @ 65 mph.


Have you considered a 3.23 gear? It is a great compromise.

Powerm01

id consider a 3.23, like I said I do wanna drive on the highway. I'm not sure about my tire hieght gonna have to do a search I know I have the bf goodrich radial T/A 225/70R14

oldsmobiledave

the 225 70 14 is 26.4" tall. 3.23 or 3.42 gears are the way to go if you are sticking with that tire & a 3 speed automatic.


Use this calculator to predict the cruise RPM with your tire & gear selection.

http://www.csgnetwork.com/multirpmcalc.html


Remember converter slippage will make the incurred RPM even higher than the calculated figure.