3.55s + AODE + 70 mph = what engine rpm?

[fixthedoor]

I picked up 3.55s and will be installing them soon. What rpms should I expect to see @ 70 mph?

 

[tp64]

to low lol... get 3:73

 

[bigB653]

Check out this site:
http://www.slowgt.com/Calc1.htm#RPMInGear

All you need to know is your gear ratio (which you already know), the ratio of the gear in your transmission that you will be in (0.68 for overdrive? i'm not sure about that though), your tire size (not your rim size), and the MPH you are traveling (which you know as well).
IF you have 3.55s, have a transmission gear ratio of .68, 28" tires, and you are going 70 mph, according to this mathematical equation you should be seeing 2028 RPMs.

 

[fixthedoor]

Sweet, Thanks for the link!

 

[bigB653]

No problem, has a lot of neat little formulas to play around with.

 

[trav_19]

wow what a TINY gear...i run 4.30's in my aode and i feel thats small lol

 

[wayne94mustang]

i think our aode tranny came with a .70 overdrive and the wide ratio gear set is .68...... not that it matters mutch

 

[fixthedoor]

wow what a TINY gear...i run 4.30's in my aode and i feel thats small lol

eh, it's a long distance freeway cruiser. Hehe, I don't even know how I'll feel about them though.

 

[trav_19]

wow what a TINY gear...i run 4.30's in my aode and i feel thats small lol

eh, it's a long distance freeway cruiser. Hehe, I don't even know how I'll feel about them though.

yeah my car came with a 3.27 stock so i needed to go big...also the car is not a DD ...i put maybe 500 miles a year on it lol plus with gas i can see a need to keep those rpms down

 

[FunkyBoss]

I ran 4.30's on my '97 Cobra and my MPG improved slightly. My '94 came with 3.73's, I'll probably keep them for a while but I do wish it had alittle more.

 

[Jrgunn5150]

i think our aode tranny came with a .70 overdrive and the wide ratio gear set is .68...... not that it matters mutch

Those ratios are backwards

 

[justinschmidt1]

Check out this site:
http://www.slowgt.com/Calc1.htm#RPMInGear

All you need to know is your gear ratio (which you already know), the ratio of the gear in your transmission that you will be in (0.68 for overdrive? i'm not sure about that though), your tire size (not your rim size), and the MPH you are traveling (which you know as well).
IF you have 3.55s, have a transmission gear ratio of .68, 28" tires, and you are going 70 mph, according to this mathematical equation you should be seeing 2028 RPMs.

His tires are more like 26 inch tall...probably like 25.7 or something...I would imagine he would be at about 2300 at 70 mph