Originally Posted By: Miller88
Originally Posted By: clinebarger
I highly recommend Yukon gear sets...Even more than OEM Spicer or FoMoCo, Installed hundreds of Yukon gears with no issues.
The Carrier Breaks on Dana 60's can be deceiving.
The "High Pinion" "Reverse Spiral" Dana 60's do not technically have a "Carrier Break", They all use 3-series carriers, However anything above 4:10, Even factory gears, The Ring Gear is thicker than a standard Dana 60 that would use a 4-series carrier for anything above 4:10.
4:56's for the front,
Randy's Ring & Pinion
FoMoCo 10.5" diffs don't have a Carrier Break, So your good there, 4:56's for the rear.
Randy's Ring & Pinion
I cant believe Ford put 3:73's in a 5.4L F250 SuperDuty 4x4, That is a Diesel/V10 gear ratio! Even when the 460 was still around....Most 4x4's had 4:10's.
If your not going to go above 33" tires, 4:30's are a good split between 4:10 & 4:56.
I don't know about the 3V 5.4, but the 2V 5.4 has to be a real dog. Even the base model single cab we have with 4.10s is sluggish.
A number of different things going on here. 3V engine is 50hp stronger with a 15lb ft torque advantage over the 2V engine, and a much lower torque peak due to VCT. Second, the 3V engines got the torq-shift 5 speed transmission, with a much lower first gear than the 4R100. I don't find it doggish, but it is a 6000+ lb truck with a 330 cubic inch V8 (although I imagine it is a little lighter than 2V trucks due to coil spring front ends). Its all about perspective. The first truck I drove very much was my Dad's 1981 Dodge 1/2 ton with a 225 slant six and a 1bbl carb hooked to a three speed auto. We're kind of spoiled these days!