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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

rear end housing style?

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Old 12-05-2011, 04:45 PM
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rear end housing style?

What style is the housing considered on 67-72? new big bearing or old or ??????? Housing ends that is.

Thanks,
Tim
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Old 12-05-2011, 05:51 PM
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housing

f100today,I have a 28 spline in my 71 which I consider a light duty rear end,can not remember the weight bearing capacities of it but I know it has a smaller axle bearing than my 72.The axle tubes on my 72 look bigger around than the 71 as it is a heavy duty axle.I overloaded my 71 with firewood and overheated the bearing and the bearing retainer to a point where the axle actually pulled away from the bearing about a foot before I got it stopped.Now I always have the shop press on the old retainer after the new retainer and bearing when I have to replace a rear bearing on a 9" just for a little added insurance.

"bowties in the rearview mirror"
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Old 12-05-2011, 07:03 PM
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your drivers door tag has the code for your diff/axles and other stuff...you can post that info and someone will decode it for you.
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Old 12-05-2011, 07:28 PM
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Quote:
Originally Posted by Nod View Post
f100today, I have a 28 spline in my 71 which I consider a light duty rear end, cannot remember the weight bearing capacity 3,300 lb. rear axle capacity of it but I know it has a smaller axle bearing than my 72.

The axle tubes on my 72 look bigger around than the 71 as it is a heavy duty axle
9" w/a 9 3/8" ring gear, 3,600 lb. rear axle capacity.
1968/72 F100: There are two different 9" rear axles.

9" with 28 spline axle shafts, with or without Limited Slip, 3,300 lb. Rear Axle Capacity.

Optional H/D 9" with a 9 3/8" ring gear, 31 spline axle shafts and Traction-Lok, 3,600 lb. Rear Axle Capacity.

9 vs 9 3/8: Only FIVE parts are the same as a 9 inch: One pinion bearing and cup, pilot bearing retainer, housing gasket and pinion seal.

EVERYTHING else is different!

The AXLE code is stamped on the Warranty Plate, located on the left door face below the latch.

I have no proof, but it's possible that the 9 3/8" rear axle was standard equipment in the following F100's:

1968/72 F100 Camper Special / 1969/70 Contractors Special & Farm and Ranch Special / 1969/72 Heavy Duty Special.

F250 2WD versions were also available.
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Old 12-05-2011, 08:37 PM
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Thanks for all the info. I guess I need to clarify something. I am looking at getting a disc brake kit for the rear end. The housing ends where the brakes bolt on are different throughout the years. They have different bolt patterns and shapes. I am not at home to check for myself so I was wondering if anyone knew what style the housing ends are. Generally they are referred as "new style big bearing" or "old style big bearing" or "old style small bearing". You have to know what housing end you have to order brakes. I figured all the 9 inch housings would have the same style ends for these years. So with the info from the above relies being given, if this were just the standard 9 inch rear end; which housing end would it have?

Thanks,
Tim
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Old 12-06-2011, 03:24 AM
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1979 9" could have either 1/2" or 3/8" backing plate bolts.

1957/83 F100 & 1975/86 F150

1957/60 used the small bearing. 1961/67 used the large bearing. 1968/72 could have either the large bearing or the one used w/the 9 3/8" rear axle.

1973 used the large bearing. 1974/79 used either the large bearing, or the axle bearing/seal combination. 1974/79: There's no way to know until you pull an axle.

1980/86 used the large bearing.

Bearings have BIN's (Bearing Industry Numbers) stamped on them. Parts stores, bearing shops go by these numbers.

D8AZ-1225-C (replaced C9AZ-1225-A & C1SZ-1225-A) .. Large Axle Bearing ~ Marked: F208-HL // C9AZ-1225-A marked 88128 or FPP or F208AKK // C1SZ-1225-A marked 88128.

E0TZ-1S177-CA (replaced C9AZ-1177-A & B7A-1177-A) .. Axle Seal-Use with large axle bearing.
---------------------------------------------------------------------------------------------
D4AZ-1225-A .. Axle Beariing/Seal Combination (Ford did not sell the bearing only) / Marked: U-399-A-1.

D4AZ-1177-A .. Axle Seal.
--------------------------
D0TZ-1225-A .. Axle Bearing-Use with 9 3/8" ring gear / Marked: 1580.

C9VY-1177-A .. Axle Seal-Use with 9 3/8" ring gear.

These same parts (including the 9 3/8" [1966/73 Lincoln, some LTD/Birds & Mercs]) were also used on specific Passenger Cars.
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Old 12-07-2011, 09:41 PM
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Here is what I was talking about.


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Old 12-09-2011, 12:20 AM
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You have to physically look under the truck where it mounts the backing plates and determine what you have. Can be big bearing old or big bearing new.

Garbz
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Old 12-09-2011, 02:13 AM
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Quote:
Originally Posted by NumberDummy View Post
1957/83 F100 & 1975/86 F150

1957/60 used the small bearing. 1961/67 used the large bearing. 1968/72 could have either the large bearing or the one used w/the 9 3/8" rear axle.

1973 used the large bearing. 1974/79 used either the large bearing, or the axle bearing/seal combination. 1974/79: There's no way to know until you pull an axle.

1980/86 used the large bearing.

D8AZ-1225-C (replaced C9AZ-1225-A & C1SZ-1225-A) .. Large Axle Bearing.

Marked: F208-HL // C9AZ-1225-A marked 88128 or FPP or F208AKK // C1SZ-1225-A marked 88128.

E0TZ-1S177-CA (replaced C9AZ-1177-A & B7A-1177-A) .. Axle Seal-Use with large axle bearing.
Quote:
Originally Posted by garbz2
Can be big bearing old or big bearing new.
1961/86: There is only one large (big) 9" axle bearing.
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