Does anyone know the transmission ratios with a 97 4.6 F150 automatic with overdrive?
I have a 3.08 diffrential gear but need to determine if OD is too tall for towing 4000 lbs. This truck has no tachometer but I feel the rpm needs to be around 2000 at 60 mph to tow this much weight.


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97 4.6 F150, 88 5.0 Mustang 1/8 = 7.409 @ 93.72 mph

 

4R70W ratios:
1st 2.84:1
2nd 1.55:1
3rd 1:1
4th 0.7:1
at 60 in 4th you're turning 1300-1400 rpm,
3rd will put you a lot closer to the torque curve of the engine

 

Thanks StrangeRanger,

That .7 was what I was looking for. I just couldn't believe nobody knew this ratio. I bought my F150 used at a Dodge dealer so I could not get that information before I bought it. This kind of information is what I insist on before I purchase a new vehicle. Doesn't everybody?

Does look like I will be in D for pulling my Mustang. That puts me right at 2200 rpm at 60 mph. My tire diameter is 28" as close as I can measure.