kovacsr15

I have a 2004 4.6 auto with flowmasters and cai. want change my gears to 373 390 or 410.my concern are the rpms at 65. what will be the rpms with
410s.my tire size is 245 45 17 I was told that makes a difference.can any one help me thanks.

cliffyk

Here is my How Fast can I Go in Each Gear? calculator--select the 4R70W transmission and the various final drive ratios, it will tell you what you wish to know...

H0SS302

How you liking your SL500 cliff?

cliffyk

I like it a bunch! It is certainly a different sort of ride than those I have owned in the past.

It took a while to settle in with the fact that it is not, nor will it ever be by any definition, a "race" car; but instead a VERY refined honest-to-goodness GT roadster with enough power to pass almost anything--except a gas station...

Trying now to find a set of "Bullitt" wheels that fit it:

H0SS302

Nice, looks like a fun car to take on a drive. Im currently restoring an 88LX into a fun cruiser. Gonna be a while before its road ready though. LOL

Good to see your still around though!

SyNdicateZ

4.10's. get em. Just cruise at 55.