Originally Posted by 4Bangler
The 390/auto/divorced 203 '77 F-250 I cut up had 4.10's...both of my '77 F-150 front axles had 3.54's...
I've only owned two 73-77 trucks. Both were parts trucks, but originally FE motor manual trans f-250 models. Both had 4.10. I've read that 73-77 trucks used a wider array of gear ratios, but for 78-79 I've only seen the two. I'm not saying thats all they used, but the "norm" those two years seems to be manual - 4.10 Automatic - 3.54.