I will snap a pic of the door sticker in the morning. Will it list the rear end with a code or what

 

EDIT: I just noticed you posted the axle ID tag: S 808A = 8.8" Rear Axle / 3.55-1 / Limited Slip / 3,750 lbs. Rear Axle Capacity.

There are two possible rear axles for a 1985 F150, both are EZ to identify.

Ford 8.8" has an inspection cover, 9" does not.

8.8" introduced in 1983 F100/150, Bronco & E100/150. But the 9" (introduced in 1957) continued to be used thru 1987.

It all depended on the application which type of rear axle was installed in these vehicles.

8.8" rear axle ID tag located under one of the bolts that retains the inspection cover to the housing.

9" rear axle ID tag located under one of the bolts that retains the carrier (pumpkin) to the housing, original location at approx. 3 o'clock.

But...by now, these tags could be missing.

AXLE code printed on the Certification Label. If the code begins w/a letter: Limited Slip. If with a number: No Limited Slip.

 

I need the same info its here on FTE but it can be hard to find I hope this helps.

Ford Rear axle codes used from 1981-1986
13- Ford 9" 2.75 ratio 1981-83
13- Ford 8.8 4.11 ratio 1985-86
H3- Ford 9" ls 2.75 ratio 1981-82
H3- Ford 8.8 axle 4.11 ratio with limited slip 1985-86 (3800 pound)
14- Ford 9" 3.00 1981-1986
H4- Ford 9" 3.00 Limited slip diff 1981-86
15- Ford 9" 3.25 1981-82 and 2.73 in 1983
H5-Ford 9" 3.25 limited slip 1981-82 and 2.73 in 1983
16- Ford 9" axle 3.50 ratio (3750 pound)verified
H6- Ford 9" axle 3.50 ratio with limited slip (3750 pound)verified
18- Ford axle 8.8 3.08 ratio (3800 pound) 1983-86verified
H8- Ford axle 8.8 3.08 ratio limited slip (3800 pound) 1983-86verified
19- Ford axle 8.8 3.55 ratio (3800 pound) 1983-86verified
H9- Ford axle 8.8 3.55 ratio with limited slip (3800 pound) 1983-86verified
23- Dana 60-3 axle 3.54 ratioverified
24- Dana 60-3 axle 3.73 ratio verified
29- Ford Semi Float Sterling 10.25, 3.55 ratio
B9- Ford semi Float Sterling 10.25, 3.55 ratio limited slip diff
B5-Ford semi Float Sterling 10.25, 4.10 ratio limited slip diff
39- Ford full float Sterling 10.25 3.55 (single rear wheel)
C9- Ford full float Sterling 10.25 3.55 (single rear wheel) with limited slip diff
35- Ford full float Sterling 10.25 4.10 (single rear wheel)
C5- Ford full float Sterling 10.25 4.10 (single rear wheel) with limed slip diff
33- Dana 61-1 3.54 ratioverified
C2- Dana 61-1 3.54 ratio with limited slip diffverified
52- Dana 70-1 HD 4.10 ratio (8700 rating)verified
53- Dana 70-1 HD 3.54 ratio from 1983-86 (4.56 in 1982) (7400 rating)verified
E2- Dana 70-1 Hd 4.10 ratio with limited slip diffverified
49- Ford Sterling 10.25 dual rear wheel 3.55 ratio (7400 rating)verified
D5- Ford Sterling 10.25 dual rear wheel 4.10 with limited slip diff (7400 rating)
69- Ford Ford Sterling 10.25 dual rear wheel 3.55 ratio (8250 rating)
F5- Ford Ford Sterling 10.25 dual rear wheel 4.10 ratio limited slip (8250 rating)

 

Codes refer to: 1980/89 F100/350, Bronco & Econoline. 1983/89 Ranger, 1984/89 Bronco II, 1986/89 Aerostar.

1980 Warranty Plate / 1981 thru today Certification Label.

 

I just copy and pasted that info and since number dummy knows his stuff he is probably right with his correction. Thanks number dummy.

 

Ok. Just so I'm clear here The rear end has been identified as a LS 8.8

Is this correct?

 

I don't know you never posted the door code.

 

Here is the door code pic

 

19- Ford axle 8.8 3.55 ratio (3800 pound) 1983-86verified
Yup that's the one you got.

 

LS as well?

 

Not according to the chart most of the ls have letters mine does any way.

 

Hmmm. I'm still uncertain of which gear lube to use so I don't mess up the rear end.

 

Numbers Dummy thought it was an LS I thought.

 

According to the door sticker it is just an open diff. So just use plain old 80/90W

 

This is the kind of confusion that comes when multiple people start talking about more than one truck....

Look at the pages that ND posted and one can see for themselves if it's LS (aka posi-traction) or not.... a Code 19 is NOT a LS axle, so, therefore, no special oil or additives are needed.