front/rear end
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From: Rocky Point, North Carol
front/rear end
I was trying to find out what the stock front and rear ends are on a 77 f150 4wd. (gear ratio, size, and whether they are lockers, limited slip, or open.) I am going to put 37" or 39" tires on it eventually, and I need to decide what I should change on my drivetrain. The truck has a 351m, and a 6" susp. lift. :-
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Joined: Feb 2002
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From: Cleveland, WI USA
Yup, stock was the D44 front and 9" rear. 3.50 and 3.55 are the most common gear ratios. Some had factory LS rears if you're lucky. Check the rear dif for a metal plate between two of the bolts. That will tell you all about the axle. If it says something like 3.50, it's a 3.50:1 ratio open dif. If it says 3L50, it's 3.50:1 ratio with LS or (Track Lock as Ford called it)
I saw a chart somewhere that an FTE user posted a link to. It had max tire sizes for certain axles. I believe the max reccomended tire size for the Dana 44 was 35". The 9" should handle 44s if you have the 31 spline axles, but you have to pull the axle out to count the splines.
That doesn't mean you CAN'T run 44s, you're just a lot more likely to break something.
Kevin K.
I saw a chart somewhere that an FTE user posted a link to. It had max tire sizes for certain axles. I believe the max reccomended tire size for the Dana 44 was 35". The 9" should handle 44s if you have the 31 spline axles, but you have to pull the axle out to count the splines.
That doesn't mean you CAN'T run 44s, you're just a lot more likely to break something.
Kevin K.
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From: Rocky Point, North Carol
I think I will stick with 37's in the interest of cost and room. I don't wanna give up too much suspension travel by cramming all the rubber I can under the wheel wells. It looks like my next project will be the diff's. I would like LS or selectable lockers, and Dana 60's. I'm also hunting a 4bbl intake for my 351m if anyone has any ideas!
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