1977 f150 9" ford

[L67ss]

So after learning my olds had 2.14 gears my rear axle situation became a bit more urgent. My brother in law has a 77 f150 4wd with a good rear with what I believe is a 3.50 gear. I can do the fab to narrow the rear(would center the dif if I do) and swap mount tabs. My question is the axles. Is it possible to just shorten the long side to center the dif and then just use two shortside axles and still have it somewhere in the right neighborhood on width? If not what is a cheap place to get axles to work with the truck dif or is it possible to shorten the stock axles and have them resplined?

 

[Bar50]

The housing can be made to work.


There are mount kits available $100-130.

http://www.speedwaymotors.com/Search?query=9+inch+ford+metric+brackets

I would get the deluxe kit for the lower mounts with multiple holes for the money, you plan on a big block.


You can cut the lower mounts off of your housing and carefully open of the axle area to match the diameter of the 9 inch axle tube. Fab up something for the top. Save your spring cups/mounts.


Around here, the current rate to re-spline an axles is like $100-150. To cut them down, re-spline and weld up the flange and re-drill to car or whatever bolt pattern and press on new bearings ($30 each side with a seal) that you supply is $100 each...$70 less than brand new axles and bearings or $10 less than re-splined axles with new bearings.

Most will end up with different length axles on each side, big housing, has to fit under the car and to avoid really odd driveshaft angles.

New axles are around $270-300 a set, whatever length you want, with most spline counts, that will be the wheel bolt pattern you want and the correct flange offset to match aftermarket brakes. They will also have new bearings pressed in place. The truck should have 31 spline axles, you should pull one out and confirm as they could be 28 spline.


There is not a cheap swap for a rear for a G-body. Trust me, I wish there was.

Housing and axles for $745 or housing for $365:

http://www.quickperformance.com/GM-G-Body-Malibu_c_544.html

Speedway has the 9 inch housing for $459


The only other thing close is either a 64-72 A-body Chevelle 10 or 12 bolt with a kit to correct the control arm geometry OR a Fox body Ford 8.8 with similar kit to correct the geometry they range in price and how effective they are from $150-$500. Both will require unique offset wheels and the Ford will have its own wheel pattern.

 

[L67ss]

I guess I'll need to measure from center of dif to hub flange on the short side to see what overall width I'd end up with. If I can get away with two shortside axles I still have the short side shaft with new bearings from my old 79 f100. Bolt pattern change is something I can do myself.

 

[L67ss]

Way my rear suspension is setup the wheel offset part is pretty lax. I lifted the rear to dependably clear wide tires back in 04. A 60-62" wide rear would be close enough in my situation

 

[lilbowtie]

Bar 50 said it all - your center section has to line up w/ transmission which is off set so your cutting plans won't work. Since your cutting down you might want to put GM ends on it. Would go w/ at least 31 spline and I personally don't trust re-spline and it's not that much more for new(chevy pattern). Put pen to paper and you might want pay the man is money and buy a bolt in.

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Rear End Widths
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Home > Specs > Rear End Widths

Representative for comparison purposes only
Ford
Outside
Width Year Model
56.50 1969-1977 Maverick 8"
57.00 1974-1978 Mustang II 8"
57.25 1957-1959 Ford, Ranchero, Station Wagon
57.25 1965-1966 Mustang
58.00 1966-1977 Bronco
58.00 1964-1965 Falcon
58.00 1977-1981 Granada/Versailles
58.50 1977-1981 Versailles
59.25 1967-1970 Mustang, Fairlane, Comet, Cougar
60.00 1967 Cougar
60.00 1958-1960 Edsel
61.00 1964-1971 Ford Full Size
61.00 1949-1951 Mercury
61.25 1957-1972 Ford F-100 Pickup
61.25 1960-1964 Ford Full Size
61.25 1971-1973 Mustang
61.25 1967-1973 Torino, Ranchero, Fairlane
63.00 1970-1979 Ranchero & Torino
63.00 1972-1979 Ford Full Size & Intermediate
63.50 1967 Fairlane (Coil Springs)
65.25 1973-1986 Ford F-150 Pickup
65.25 1978-1986 Bronco
65.25 1973-1986 Ford Van 3/4 Ton
68.00 1972 Ford Van 3/4 Ton
69.25 1977-1986 Ford E-150 Van


Chevy

Outside
Width Year Model
54.25 1983-2004 Chevy S10 2WD, GMC S15 2WD
57.75 1962-1964 Chevy II/Nova
57.75 1965-1967 Chevy II/Nova
58.00 1978-1988 Chevy Malibu, Monte Carlo
59.50 1968-1982 Corvette
60.00 1955-1964 Chevy Car
60.00 1967-1969 Camaro
60.25 1968-1979 Chevy II/Nova
60.50 1984-1995 Corvette
60.50 1964-1967 Chevelle
62.00 1955-1959 Chevy Pickup
62.50 1968-1972 Chevelle
62.50 1970-1981 Camaro/Firebird
Mopar

Outside
Width Year Model
55.60 1960-1976 7 1/4 A-body
55.60 1973-1976 8 1/4 A-body
55.60 1966-1972 8 3/4 A-body
55.60 All 8 3/4 A-body
56.00 1932-1934 All Mopars
57.40 1963-1972 7 1/4 A-body
58.54 All 8 1/4 F-body
58.54 All 8 1/4 M-body
58.54 All 8 1/4 J-body
59.00 1935-1936 All Mopars
59.14 1966-1970 9 3/4 B-body
59.20 1962-1970 8 3/4 B-body
60.00 1937-1948 All Mopars
60.70 All 8 3/4 E-body
60.70 All 9 3/4 E-body
62.00 All 8 1/4 B-body
62.00 1971-1974 8 3/4 B-body
62.00 All 9 1/4 B-body
63.40 All 8 1/4 C-body
63.40 1971-1974 8 3/4 B-body S.W.
63.40 All 9 1/4 C-body
GM & Mopar Body Style Codes
Last Update: 04/21/09

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G. McDowell

est. 1996

 

[Bar50]

I guess I'll need to measure from center of dif to hub flange on the short side to see what overall width I'd end up with. If I can get away with two shortside axles I still have the short side shaft with new bearings from my old 79 f100. Bolt pattern change is something I can do myself.

Look man, make it work with what you have. I share information in an attempt to keep people (like you) from going through all the crap that I have had to, to save you from the hassle and wasted money. On the cheap, get a set of gears from an 7.5 S10.


If you really plan on building a big block for this car, all that stuff that is cheap or just not quite right, it will throw it out on the ground until you spend the money, trust me, or not, ask anyone with a big block in their car that has actually punished it a little bit.

Good luck.

If I said "Hey, don't touch that glowing red bolt, its hot, it will burn you!" Would you touch it to see anyway?

 

[Bar50]

https://gbodyforum.com/threads/9-inch-rear-for-gbody.62223/

 

[L67ss]

Well anyway after looking it up turns out even though the "pumpkin" is off center the axle shafts are equal length. So I'd be stuck modifying or buying shafts anyway. On the housing....if I were to buy a bolt in housing it'd be a Dana or a 12 bolt

 

[L67ss]

Another perk of modifying the housing myself is I can do stuff like raise my uca mounts. Handy as the rear is lifted 5-6"

 

[Bar50]

Well anyway after looking it up turns out even though the "pumpkin" is off center the axle shafts are equal length. So I'd be stuck modifying or buying shafts anyway. On the housing....if I were to buy a bolt in housing it'd be a Dana or a 12 bolt

Sure, me too, I have never seen one used for sale and new S60 $2500 for housing and axles.