i want to get 4:56's in my 4x4 1997 f150, i am getting 33 inch tires. i was wondering if anyone would know roughly what it would rev at on the highway

 

There are no hub conversions for it, the reason being is that the axle uses a center disconnect and to use hubs would require a complete redesign. The only option you really have is gears. There are very few lockers or LS available for this axle. The reason is that lockers are MUCH harder on these axles than they are the old D44TTB. You get to pick from the stock ratios then 4.10, 4.56, and I've HEARD of 4.88s but never seen anyone that actually sold them. You might be able to get 4.30s since they're offered for the rear but not the front, though gears from a currie HP 9" should work. Welcome to the wonderful world of IFS

 

i was just wondering with the 4:56's, how much would it slow down my top end, and how would it bee on the highway with 33 inch tires

 

Unless you're going to do some serious mud boggin or you want to smoke camaros in the holeshot, I would go with a higher gear. 4.11 at the lowest. 4.56's would make you're engine rev probably in the mid 2000's. If you drive over 65 mph on a normal basis 4.56's would kill you're fuel mileage, stress you're engine and just be overkill. I have a 4.6 in my 98 4x4, I put 35x12.50's on and i put in 4.11's, plenty of low end grunt with top end speed ability. Rock on dude

 

Click here and plug a few figures in the calculators on the left.
http://www.ring-pinion.com/calculato...latorsind.html

 

I have 35s and 4.56s on my truck. See my sig for all specs. It revs around 3100 doing 70 on the freeway.

-Abrams