This is topic what rpm am i at with 4.11s on an AOD in forum Tech Talk at Northern California Ford Owners  .


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Posted by 67stang12s (Member # 2314) on :
 
At 75mph
at 60mph
 
Posted by 91sleeper (Member # 779) on :
 
Dont GM's have 4.11's? Fords have 4.10's bro. [patriot]
 
Posted by 67stang12s (Member # 2314) on :
 
i'm talking about a 9 inch rearend
not a 8.8
 
Posted by KCmustangboy (Member # 1927) on :
 
What size tire?
 
Posted by KCmustangboy (Member # 1927) on :
 
quote:
Originally posted by KCmustangboy:
What size tire?
A 245/45/17 would run 2194rpms at 60mph or so and 2743rpms at 75, these should get you close...
 
Posted by 67stang12s (Member # 2314) on :
 
im on 275/40/17s
thanks kc
that sounds good
but a little too good because I used to have 373 in my 88 lx and that thing seemed to be at 3000 at 75 but i couldnt really tell my speedometer wasnt accurate since i had gears
 
Posted by KCmustangboy (Member # 1927) on :
 
quote:
Originally posted by 67stang12s:
im on 275/40/17s
thanks kc
that sounds good
but a little too good because I used to have 373 in my 88 lx and that thing seemed to be at 3000 at 75 but i couldnt really tell my speedometer wasnt accurate since i had gears
There is a lot to consider...the slipping in the torque converter...exact tire size..ect.. but If you get a tape and measure the exact tire size in inchs and make sure your AOD has the .67 overdrive you should be able to know real close.
 




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