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What are the 3rd gear ratios for the C4/C5/C6 ?

85 F150 3sp. auto. orig. 3.08 rear, orig. 300/6 now 95 302HO.

I believe I have a C5. At about 70mph I'm turnin 3000+RPM. I going to a 3.55 rear (the 3.08 won't leave a stoplight) which would increase my revs at 70mph to who knows what. With a 3.55 rear I would need a AOD for the hiway. I was wondering "what if I used a C6 instead of an AOD, surely a C6 must have a higher 3rd gear and that would allow me to run the hiway now and then." C6's are plentiful w/out the expense of modding a AOD, right?

Thanks,
Meaux
 

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I think they're all 1:1 or thereabouts. The first two might be different but the 3rd gear is probably the same on all three. This is just a wild ass guess though, somebody around here probably knows for sure. Good luck
 

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The c-4 and c-6s have 1;1 high gears and I'd bet the farm the c-5 does too.If you want to decrease rpms with your transmission I'm afraid you'll need an overdrive.
 

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All ford 3 spd auto's have a 1:1 fignal gear. C3-C6 and the trans akel that is a 3 speed. Come to think of it, all 3 spd auto's from GM and chrysler are 1:1 fignal.
 
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